Entries |
Document | Title | Date |
20090201009 | METHODS FOR MEASUREMENT AND CHARACTERIZATION OF INTERFEROMETRIC MODULATORS - Various methods are described to characterize interferometric modulators or similar devices. Measured voltages across interferometric modulators may be used to characterize transition voltages of the interferometric modulators. Measured currents may be analyzed by integration of measured current to provide an indication of a dynamic response of the interferometric modulator. Frequency analysis may be used to provide an indication of a hysteresis window of the interferometric modulator or mechanical properties of the interferometric modulator. Capacitance may be determined through signal correlation, and spread-spectrum analysis may be used to minimize the effect of noise or interference on measurements of various interferometric modulator parameters. | 08-13-2009 |
20090237070 | METHOD OF INSTANTANEOUSLY DETERMINING OR ESTIMATING THE FREQUENCY OR AMPLITUDE OF AN INPUT SIGNAL - A method of instantaneously determining or estimating the frequency of an input signal includes mixing a digitally sampled and quantized input signal ( | 09-24-2009 |
20090251129 | FREQUENCY MEASUREMENT DEVICE AND MEASUREMENT METHOD - A frequency measurement device includes: a short gate time counter section that continuously measures a pulse stream signal supplied, and outputs a series of count values that behave like a pulse stream corresponding to a frequency of the pulse stream signal; and a low-pass filter that removes high frequency components from the series of count values to obtain a level signal corresponding to the frequency of the pulse stream signal supplied. | 10-08-2009 |
20090261809 | TESTING DEVICE INCLUDING LOW-PASS FILTER WITH AUTOMATICALLY SWITCHING FUNCTION - A testing device including low-pass filter with automatically switching function is disclosed in the present invention, comprising: a control circuit used to control the operation of the testing device and provide a reference frequency (Fr); a frequency detection circuit, connected to the input end and the control circuit and used to output a high frequency control signal; a low-pass filter connected to the frequency detection circuit, used to filter the testing signal of the input end to output a frequency signal; a frequency evaluation circuit connected to the control circuit and to the frequency signal outputted from the low-pass filter, the frequency evaluation circuit outputting a medium frequency control signal to the low-pass filter and outputting a frequency testing value to a display at the same time; and a voltage measuring circuit, connected to the low-pass filter and the control circuit and used to output a voltage measuring value to the display. | 10-22-2009 |
20090322311 | Method and Apparatus for On-Chip Testing of High Speed Frequency Dividers - Embodiments of the disclosure provide systems and methods for using a PLL and a high frequency generator outside the loop to obtain the fmax of the divider. The divider in the PLL loop is fed by a VCO and its operation range is characterized by measuring the PLL lock range. An identical copy of the same divider is used outside the PLL loop and it is fed by a higher frequency clock. The high frequency clock is generated by the multiple phase of the VCO. By characterizing the outputs from both dividers, the fmax of the divider is obtained. | 12-31-2009 |
20100019758 | AC ELECTRIC QUANTITY MEASURING DEVICE - In the present invention, a measured realtime accurate frequency is used to determine estimated instantaneous voltage/current time-series data for each phase component in accordance with the least-squares method. The estimated instantaneous voltage/current time-series data are used to determine effective voltage, effective current, instantaneous active electric power, instantaneous reactive electric power, effective active electric power, and effective reactive electric power of each phase component and symmetrical component. The measured AC electric quantities are applied to any type of electric power system control/protection apparatus. | 01-28-2010 |
20100060258 | METHOD FOR MEASURING THE MAINS FREQUENCY, AND ELECTRICAL APPLIANCE THAT IMPLEMENTS SAID METHOD - A method for measuring the mains frequency by a digital control system of an electrical appliance, in particular an electrical household appliance, in which the digital control system is prearranged for performing rigorous measurements of the value of the mains frequency and of its variations through an operation of calibration of the means for measurement of the mains frequency performed prior to marketing of the product. | 03-11-2010 |
20100072978 | SYNCHROPHASOR MEASURING DEVICE AND INTER-BUS-LINE PHASE ANGLE DIFFERENCE MEASUREMENT UNIT USING THE SAME - Voltage instantaneous value time-series estimation data and a present-time voltage estimation value are calculated by using an actually-measured frequency and voltage instantaneous value time-series data according to a least square method. A present-time voltage effective value is determined by using the calculated voltage instantaneous value time-series estimation data, and a present-time synchrophasor, a voltage distortion degree and an inter-bus-line synchrophasor phase angle difference are determined by using the present-time voltage effective value and the present-time voltage estimation value. | 03-25-2010 |
20100141239 | Secum-Trahenz Method, Especially for a Network Analyzer - The invention relates to a method for measuring objects for measurement, by means of a network analyzer with several measurement ports, at least one signal generator, for stimulating the object for measurement and at least one local oscillator, for measurement of the signal transmitted or reflected from the object for measurement by the superposition principle. According to the invention, on a frequency change, only the frequency of the local oscillator or the frequency of the signal generator is changed but not the frequency of the local oscillator and the signal generator simultaneously. | 06-10-2010 |
20100141240 | METHODS FOR DETERMINING THE FREQUENCY OR PERIOD OF A SIGNAL - Methods for determining timestamps for signal timing edges for use in, e.g., a reciprocal counter for determining the frequency of a signal is disclosed, comprising the steps of inputting the signal into a tapped delay line, producing a plurality of delay line tap signals at the output of each of the delay line taps. In one embodiment, after detecting the signal timing edge and determining an initial time value corresponding to the timer clock cycle count at the signal timing edge or the next clock timing edge, the delay line tap signals are monitored to determine a fractional correction time value adjustment to be made to the initial value to account for the delay between the signal timing edge and the next clock timing edge to determine the timestamp. In another embodiment, after detecting the signal timing edge, the average of a plurality of delay line timer clock cycle counts corresponding to the timer clock cycle counts at the delay line tap signal timing edges is used to determine the timestamp. | 06-10-2010 |
20100188071 | SYSTEMS AND METHODS FOR DETECTING RESONANCE ON A DIRECT CURRENT VOLTAGE BUS - Systems and methods are provided for detecting a resonance on a bus coupled to an inverter module. A method comprises generating a first signal on the bus with a first frequency and sweeping the first signal from the first frequency to a second frequency. A second signal, which may be influenced by a characteristic of a component coupled to the bus, is obtained from the bus during the sweep of the first signal from the first frequency to the second frequency. The method further comprises determining a resonant frequency based on the first signal and the second signal and updating the inverter module such that the resonant frequency is not used as a switching frequency for the inverter module. | 07-29-2010 |
20100289479 | SENSOR SYSTEM AND METHOD - The present invention provides a sensor system and a corresponding sensing method employing the sensor system. The sensor system comprises a sensor ( | 11-18-2010 |
20100295533 | PASSIVE INTERMODULATION DISTORTION MEASURING METHOD AND SYSTEM - According to a reception passive intermodulation measurement method of the present invention, a device under test is set to the mismatching condition, and a standing wave is generated on a transmission line where the sample is connected. Since the tip of the transmission line is short-circuited using the sample, the sample is positioned at the anti-node of the standing wave, and test signals are applied at a high current density. System noise is calibrated with the tip of the transmission line being open. Since impedance matching is not required and terminators are not employed, a large measurement dynamic range is obtained without being affected by passive intermodulation that is generated in terminators. The sample is very small, and an arbitrary shape can be selected. The property measurement is enabled for a wide range of materials, regardless of a conductive material, an insulating material and a magnetic material. | 11-25-2010 |
20100295534 | ELECTROMAGNETIC WAVE MEASURING APPARATUS, MEASURING METHOD, PROGRAM, AND RECORDING MEDIUM - According to the electromagnetic wave measurement device of the present invention, an electromagnetic wave output device outputs an electromagnetic wave having a frequency equal to or more than 0.01 [THz] and equal to or less than 100 [THz] toward a device under test. An electromagnetic wave detector detects the electromagnetic wave which has transmitted through the device under test. A relative position changing unit changes a relative position of an intersection across which an optical path of the electromagnetic wave transmitting through the device under test and the device under test intersect with respect to the device under test. A characteristic value deriving unit derives a characteristic value of the electromagnetic wave based on a detection result of the electromagnetic wave detector while the characteristic value is associated with an assumed relative position which is the relative position if it is assumed that the electromagnetic wave is not refracted by the device under test. A first association correction unit changes the assumed relative position to an actual relative position, which is the relative position if the refraction of the electromagnetic wave by the device under test is considered, thereby associating the result derived by the characteristic value deriving unit with the actual relative position. A corrected characteristic value deriving unit that derives the characteristic value associated with a predetermined relative position based on an output from the first association correction unit. | 11-25-2010 |
20100295535 | FREQUENCY MEASUREMENT DEVICE - A frequency measurement device for measuring a frequency of a signal to be measured including a pulse signal, includes: a signal multiplier section that multiplies the signal to be measured by n is an integer) and outputs a multiplied signal; a counter section that counts the multiplied signal with a predetermined gate time and outputs a count value of the frequency of the signal to be measured at a predetermined period; and a low-pass filter that outputs a signal corresponding to the frequency of the signal to be measured based on the count value outputted at the predetermined period. | 11-25-2010 |
20100295536 | FREQUENCY MEASURING APPARATUS - A frequency measuring apparatus includes: a counter section adapted to count a signal including a pulse signal for a predetermined time period, and output a binary count value corresponding to a frequency of the signal including the pulse signal; and a low pass filter section adapted to perform a filtering process on the count value, wherein the low pass filter section includes a first stage filter and a second stage filter, the first stage filter is a moving average filter to which the count value is input, and which provides a binary output with a high-frequency component reduced, and the second stage filter performs an average value calculation on the binary output to provide an output with the high-frequency component reduced. | 11-25-2010 |
20100295537 | FREQUENCY MEASURING APPARATUS - A frequency measuring apparatus includes: a high-order digit calculation section adapted to measure an input signal and output a high-order digit value of a frequency value of the input signal; a low-order digit calculation section adapted to measure the input signal and output a low-order digit value of the frequency value of the input signal; and an adding section adapted to add the high-order digit value and the low-order digit value to each other to output the frequency value of the input signal. | 11-25-2010 |
20110001468 | FREQUENCY CHARACTERISTICS MEASURING DEVICE - It is possible to provide a frequency characteristics measuring device which can simplify the configuration for performing a measurement and reduce the undue effort required for the measurement. | 01-06-2011 |
20110025297 | PARAMETER CALCULATING APPARATUS AND SIMULATION APPARATUS - A parameter calculating apparatus includes a signal generator that generates at least two input signals which each contain different frequency components; a signal inputting unit that inputs the input signals generated by the signal generator to respective ports of a test object at the same time; a frequency component deconstructing unit that deconstructs an output signal which is obtained by synthesizing the input signals input by the signal inputting unit and output from an output port into the frequency components; and a parameter calculator that calculates parameters which indicate transfer coefficients among ports of the test object based on output values of the frequency components obtained via the deconstruction performed by the frequency component deconstructing unit and on input values of the frequency components of the input signals input at the same time to a plurality of ports. | 02-03-2011 |
20110057643 | OSCILLOGRAPH AND SIGNAL INTEGRITY TEST METHOD USING THE OSCILLOGRAPH - A oscillograph and a signal integrity test method are provided. The oscillograph measures a serial data bus to obtain captured signals transmitted by each communication channel of the oscillograph. By identifying a time sequence for the captured signals transmitted by each communication channel, a test signal is determined. The oscillograph measures a clock frequency of the test signal, sampling a part of the test signal, and testing the part according to pre-set test items. If a predetermined number of samples of the test signal is tested, the oscillograph constitutes a completed signal integrity test of the serial data bus and a test report is generated. | 03-10-2011 |
20110062943 | TIMING DETECTION DEVICE - A timing detection device includes a draw back amount acquiring unit and a detecting unit. The draw back amount acquiring unit is configured to acquire a draw back amount of a received signal with respect to a peak value of the signal. The detecting unit is configured to detect the timing at which the draw back amount acquired by the draw back amount acquiring unit has exceeded a constant value as the timing at which a value of the signal is switched. | 03-17-2011 |
20110074389 | Signal Acquisition System Having Probe Cable Termination in a Signal Processing Instrument - A signal acquisition system has a signal acquisition probe having probe tip circuitry coupled to a resistive center conductor signal cable with the signal cable coupled to a signal processing instrument via an input node. The input node is coupled to an input current amplifier via input circuitry. The input circuitry provides at least one of resistive and capacitive termination of the resistive center conductor signal cable. The termination of the resistive center conductor signal cable in the signal processing instrument provides a signal acquisition system where the capacitive loading of a device under test at higher frequencies is reduced by reducing the input capacitance of the probe tip circuitry resulting in an increase in the signal acquisition system bandwidth. | 03-31-2011 |
20110095747 | METHOD AND DEVICE FOR FAST MEASUREMENT OF FREQUENCY RESPONSE WITH SCALABLE SHORT CHIRP SIGNALS - A method and device are provided for fast impedance measurement of a biological object having dynamically varying in time parameters, wherein a titlet shaped pulse is introduced into the object and a voltage response signal is measured and analyzed by a processing unit for estimating the impedance of the object. The titlet pulse has a start frequency substantially in one end of the frequency range of interest and a stop frequency substantially in the other end of the frequency range of interest and a duration of the titlet pulse is one cycle or less. | 04-28-2011 |
20110095748 | DIFFERENTIAL TARGET ANTENNA COUPLING (DTAC) - Sub-surface detection systems include a transmitter antenna and a receiver antenna that is coupled to a receiver circuit. The receiver antenna is rotated to three different orientations, and a reference null field direction is determined. Based on variations in the null field direction at other frequencies or variations in a magnitude of a field component in the reference null field direction, the presence, location, depth, size, and electrical properties of a target can be determined. | 04-28-2011 |
20110156693 | Operating an Integrated Circuit at a Minimum Supply Voltage - In one embodiment, an integrated circuit comprises at least one measurement unit configured to generate an output indicative of a supply voltage at which the integrated circuit is operable for a given operating frequency and a control unit coupled to receive the output. The control unit is configured to generate a voltage control output indicative of a requested supply voltage for the integrated circuit responsive to the output. The voltage control output may be output from the integrated circuit for use by circuitry external to the integrated circuit in generating the supply voltage for the integrated circuit. | 06-30-2011 |
20110163735 | SYSTEM FOR MEASURING HIGH-FREQUENCY SIGNALS WITH STANDARDIZED POWER-SUPPLY AND DATA INTERFACE - In a system for measuring at least one high-frequency signal, comprising at least one broadband probe and at least one measuring apparatus, each broadband probe and each measuring apparatus comprise a high-frequency connection for transmitting a high-frequency signal, and each measuring apparatus, or instead of a measuring apparatus each signal processing unit, comprises power supply connections for supplying power to each of the broadband probes, and comprise data signal connections for transmitting communication data between the measuring apparatus or signal processing unit and the broadband probe head. The power supply and data signal connections of each measuring apparatus, each signal processing unit, and each broadband probe are each identical with respect to the signal assignment and signal specification and are designed in accordance with an interface standard, and in each measuring apparatus, each signal processing unit and either directly in the broadband probe or in an adapter unit electrically connected to the broadband probe head are each guided in an identically standardized jack. | 07-07-2011 |
20110234201 | HIGH-FREQUENCY MEASURING DEVICE AND HIGH-FREQUENCY MEASURING DEVICE CALIBRATION METHOD - A method is provided for calibrating a high-frequency, measuring device so as to accurately measure high-frequency parameters within a chamber. A calibration parameter is calculated from impedance of a first set of three reference loads measured by a high-frequency measuring device and the true values of those impedances. A calibration parameter is calculated from an S parameter measured between a connection point where the high-frequency measuring device is connected and the inside of the chamber of a plasma processing device. An impedance within the chamber is calculated from a voltage signal and a current signal calibrated using the above calibration parameters. A second set of three reference loads, which include the impedance calculated in Step | 09-29-2011 |
20110241651 | INDICATOR POSITION DETECTING DEVICE AND INDICATOR POSITION DETECTING METHOD - An indicator position detecting device and method are provided, which allow accurate position detection without the influence of noise in detection of the position of an indicator (e.g., a finger, a stylus pen) by a capacitive coupling system. To a conductor pattern in which plural conductors for signal transmission and plural conductors for signal reception intersect with each other, signals with frequencies different from each other are simultaneously supplied to the plural conductors on the transmission side, and signals of respective frequencies corresponding to the plural signals with the different frequencies are detected on the reception side, to thereby detect the position of an indicator on the conductor pattern. The amount of noise of each of the detected frequencies is detected. Any frequency that cannot be properly detected due to noise is switched to another frequency, and detection is carried out based on the newly selected frequency. | 10-06-2011 |
20110241652 | METHOD AND ARRANGEMENT FOR ESTIMATING ANGULAR FREQUENCY - An exemplary method and arrangement for estimating the frequency and the positive sequence of a fundamental component of a measured three-phase voltage are disclosed (ν | 10-06-2011 |
20110285380 | GRID MONITORING SYSTEM AND RELATED METHOD - The present invention relates to a grid monitoring system, in particular a grid monitoring system enabling real-time monitoring of grid variables, e.g. voltage and current, in electrical power systems, such as single or three-phase networks. The grid monitoring system comprises a harmonic detection unit being adapted to subtract harmonics of an input signal before feeding the input signal to a plurality of signal generators in the harmonic detection unit. | 11-24-2011 |
20120007583 | METHOD AND DEVICE FOR FREQUENCY RESPONSE MEASUREMENT - A method is provided for measuring a frequency response of an object, the method involving: generating an excitation signal having relatively fast changing frequency, defined by a time-domain function; generating at least one reference signal, having a waveform corresponding to the excitation signal; introducing the excitation signal into the object, receiving a response signal from the object; analyzing said response signal in a signal analyzer by correlating the response signal with at least one reference signal during a relatively short sliding time-domain window. | 01-12-2012 |
20120043960 | NON-INTRUSIVE DETECTION OF LIVE ELECTRICAL LINES - A method for determining a presence of live 3-phase electrical lines inside a buried pipe or conduit from outside the pipe or conduit and preferably from an above ground location. A sensor suitable for detecting vibratory signals is placed on the ground proximate the location of the buried pipe. The sensor is then used to determine the presence of a current frequency signal and a current harmonic frequency signal, whereby presence of the current frequency signal and/or the current harmonic frequency signal corresponds to a presence of a live 3-phase electrical line within the buried pipe or conduit. Although intended primarily for use in connection with buried pipes, the method may also be employed on exposed pipes and conduits. | 02-23-2012 |
20120068690 | BULK ACOUSTIC WAVE RESONATOR SENSOR - A bulk acoustic wave resonator (BAWR) sensor is provided. The BAWR sensor includes a signal BAWR that measures a resonance frequency that is modified due to a reaction with a target material, a reference BAWR that measures a reference resonance frequency without reaction with an external environment, and a sensing unit that senses the target material, based on the modified resonance frequency and the reference resonance frequency. | 03-22-2012 |
20120105049 | SYNTHESIZER HAVING ADJUSTABLE, STABLE AND REPRODUCIBLE PHASE AND FREQUENCY - A measuring device provides a synthesizer device, at least two controlling devices and at least two controlled oscillators. The synthesizer device contains at least one direct digital synthesizer and generates at least two signals of known phase ratio. Signals generated by the synthesizer device form reference signals of at least one controlling device. Signals formed by the controlling devices control the controlled oscillators. The measuring device contains only frequency splitters, which divide by integer division factors. | 05-03-2012 |
20120217952 | CIRCUIT ARRANGEMENT FOR FREQUENCY DETERMINATION - A device and a method for frequency analysis. The frequency of an output signal is divided, and an auxiliary signal with a known frequency is subtracted from the low-frequency signal to define a low-frequency differential signal. The output frequency is determined on the basis of the frequency of the low-frequency differential signal. | 08-30-2012 |
20120274310 | ELEMENT MEASUREMENT CIRCUIT AND METHOD THEREOF - An element measurement circuit is provided, comprising a oscillator for generating a first oscillation clock and second oscillation clock, a frequency divider for dividing the first oscillation clock to generate a third oscillation clock and for dividing the second oscillation clock to generate a fourth oscillation clock, a frequency detector for detecting the third oscillation clock to generate a first count value and for detecting the fourth oscillation clock to generate a second count value, and a controller for generating a first oscillation period according to the first count value, for generating a second oscillation period according to the second count value, and for generating a measurement value according to the first oscillation period and the second oscillation period. | 11-01-2012 |
20130063127 | NOISE REDUCTION SYSTEM AND METHOD - A system and method for measuring frequency which reduces the impact of noise. The system and method includes the steps of sampling a signal train ( | 03-14-2013 |
20130069626 | Perpendicular spin torque oscillator FMR frequency measurement method - A method for measuring the frequency in a spin torque oscillator having at least a magnetic oscillation layer (MOL), junction layer, and magnetic reference layer (MRL) is disclosed. In a first embodiment, a small in-plane magnetic field is applied to the STO after a DC current is applied to excite the MOL into an oscillation state. The MRL has a perpendicular magnetization that is tilted slightly to give an in-plane magnetization component to serve as a reference layer for measuring the oscillation frequency of the MOL in-plane magnetization component. An AC voltage change is produced in the DC current as a result of variable STO resistance and directly correlates to MOL oscillation frequency. Alternatively, a field having both perpendicular and in-plane components may be applied externally or by forming the STO between two magnetic poles thereby producing an in-plane magnetization reference component in the MRL. | 03-21-2013 |
20130141077 | CURRENT METER - Apparatus, usable to measure current in a multiple-conductor cable having supply and return conductors spaced apart by a nominal conductor spacing and carrying respective supply and return currents in opposite directions, includes (1) a non-magnetic body having a cable-engaging portion defining a location and an orientation axis of the multiple-conductor cable relative to the apparatus when the cable-engaging portion engages the cable during use, (2) a planar, multi-turn wire coil supported by the body immediately adjacent to the location and lying in a plane parallel to the orientation axis, the wire coil having a coil diameter at least four times the nominal conductor spacing, and (3) signal conditioning circuitry operative in response to a voltage signal developed across output ends of the wire coil to generate a conditioned voltage signal having a voltage magnitude determined by and indicative of a magnitude of the supply current during use. | 06-06-2013 |
20130193951 | Convolution Integral for Synchronized Phasor - Systems, methods, and apparatus for providing a synchronized phasor in power system based on voltage and current measurements, sampling of the voltage and current measurements and convolving the samples with a function. | 08-01-2013 |
20130241531 | Wide Range, High Resolution Frequency Monitor - A frequency monitor provides high resolution frequency monitoring over a range of input signal frequencies by measuring the time period of the signal to produce a raw frequency value and then filtering the raw frequency value with a low pass filter to remove an error component caused by quantization effects at high input signal frequencies. The system automatically accommodates changes in the input frequency eliminating a need for manual adjustment of the system based on anticipated measured frequencies. | 09-19-2013 |
20130307524 | INFERRING THE PERIODICITY OF DISCRETE SIGNALS - A method for testing a signal comprises obtaining a signal, determining whether the signal has at least one period, measuring that period and providing the measurement as output. A power spectral density estimation can be used for signals having a single period, and an autocorrelation function with slicing can be used in an iterative procedure for finding multiple periods within signals. | 11-21-2013 |
20140002056 | SYSTEMS AND METHODS FOR MEASURING THE FREQUENCY OF SIGNALS GENERATED BY HIGH FREQUENCY MEDICAL DEVICES | 01-02-2014 |
20140049248 | SPARK DETECTION DEVICE CAPABLE OF DETECTING CHARACTERISTICS OF A SPARK SIGNAL - A spark detection device includes a sensing element and a comparing element. The sensing element is for sensing a spark signal to generate a sensing signal. A first end of the comparing element is coupled to the sensing element, and a second end of the comparing element is for receiving a threshold signal. The comparing element is for generating an output signal at an output end of the comparing element by performing a comparing operation according to the sensing signal and the threshold signal. | 02-20-2014 |
20140062455 | MEASUREMENT APPARATUS AND MEASUREMENT METHOD - To accurately measure a frequency characteristic of a waveform generating apparatus, provided is a measurement apparatus that measures a frequency characteristic of a waveform generating apparatus generating a signal having a waveform corresponding to waveform data, comprising a control section that causes a plurality of sine wave signals having different frequencies to be sequentially output from the waveform generating apparatus; a measuring section that measures each of the sine wave signals output from the waveform generating apparatus; and a calculating section that calculates a frequency characteristic of the waveform generating apparatus based on the measurement results of the measuring section. The control section causes trigger signals to be output from the waveform generating apparatus and causes the sine wave signals to be output in synchronization with the trigger signals, and the measuring section measures a phase of each sine wave signal with the corresponding trigger signal as a reference. | 03-06-2014 |
20140091783 | SYSTEM AND METHOD FOR MONITORING AC RIPPLE - A system capable of identifying various possible technical malfunctions with an uninterruptible power supply system by detecting AC ripple on a power bus of the UPS system. A battery monitor is positioned on the terminal posts of one or more batteries of the UPS system. The monitor, since it is connected with the power bus, is configured to measure and/or record AC ripple on the power bus. At the monitor or by way of communicating the AC ripple to a remote database and server, excessive ripple changes may generate an alert when such changes exceed a threshold or may be viewed through a graphical user interface. | 04-03-2014 |
20140097825 | Duty Cycle Detecting Circuit for Pulse Width Modulation - A duty cycle detecting circuit for pulse width modulation (PWM). The circuit includes a clock generating circuit, a sampling circuit and a calculation circuit. The clock generating circuit is for generating a clock signal. The sampling circuit receives a PWM signal and the clock signal, samples the PWM signal based on the clock signal, and generates a sampling signal. The calculation circuit is for calculating the duty cycle of the PWM signal based on the sampling signal. | 04-10-2014 |
20140111184 | INTERNAL CHIRP GENERATOR WITH TIME ALIGNED ACQUISITION IN A MIXED-DOMAIN OSCILLOSCOPE - A mixed-domain oscilloscope (MDO) includes a signal generator configured to generate a test signal having a span ranging from a user-configurable start frequency to a user configurable stop frequency, an output channel coupled to the signal generator and configured to transmit the test signal, an RF input channel configured to receive a return signal based on the test signal, an acquisition section configured to acquire and digitize the return signal as an acquisition record, and a ramp busy signal generator configured to substantially time-align the acquisition record with the test signal. The test signal includes a chirp signal that is a linearly swept sine wave that spans between the user-configurable start frequency and the user-configurable stop frequency. Methods include calibrating the chirp signal, connecting the MDO in various test configurations relative to external return loss bridge and DUT equipment, and performing measurements such as S | 04-24-2014 |
20140210451 | CONDITION MONITORING BY CROSS-CORRELATION OF SWITCHING-MODE POWER SUPPLIES - A method of monitoring an output signal of a switching-mode power supply for the presence and magnitude of the switching frequency comprises sampling the output signal at a sampling frequency above the minimum Nyquist limit to provide a succession of samples; cross-correlating a reference signal and the samples to provide cross-correlation values; and monitoring the cross-correlation values to ascertain the magnitude of a component of the output signal at or near the frequency of the reference signal. | 07-31-2014 |
20140218009 | DEVICE FOR MEASURING A DURATION OF A LEVEL OF AN ELECTRICAL SIGNAL - A device for measuring a duration of a level of an electrical signal, comprising first ring oscillator comprising inverting gates, whose electrical power supply is modulated by the electrical signal; second ring oscillator whose electrical power supply is not modulated by the electrical signal; first counting unit configured to count a total number of gate-to-gate transitions of a point of instability of the first ring oscillator, a point of instability being present at an inverting gate when a logic level at an input to the inverting gate is equal to a logic level at an output from the inverting gate; second counting unit configured to count a total number of gate-to-gate transitions of a point of instability of the second ring oscillator; and determining unit configured to determine a duration of a level of the electrical signal on a basis of values of the first and second counting units. | 08-07-2014 |
20140253094 | METHOD FOR THE RAPID INTERROGATION OF A PASSIVE SENSOR, IN PARTICULAR OF THE SURFACE ACOUSTIC WAVES TYPE, AND SYSTEM FOR MEASURING THE UNIQUE FREQUENCY OF SUCH A SENSOR - For passive sensor with resonator having a natural frequency, a method comprises: a first phase emission of an electromagnetic signal toward the passive sensor at an emission frequency, the resonator oscillating in a forced regime at the emission frequency and then oscillating at its natural frequency when the emission is cut off; a first phase reception of the damped signal oscillating at natural frequency emitted by passive sensor, a measurement of the frequency being performed; a second phase emission of an electromagnetic signal at the measured frequency toward the passive sensor, the resonator oscillating in a forced regime at the measured frequency and then oscillating at its natural frequency when the emission is cut off; a second phase reception of the damped signal oscillating at natural frequency, a measurement of the frequency being performed, determination of the natural frequency being stopped due to measurement performed in this second reception phase. | 09-11-2014 |
20140312881 | SYSTEM AND METHOD FOR DETERMINING ROTOR POSITION OFFSET OF AN ELECTRIC MACHINE - A method according to an exemplary aspect of the present disclosure includes, among other things, detecting a position, including a polarity, of a rotor to detect incorrect rotor position offset of an electric machine without generating torque or motion within the electric machine. | 10-23-2014 |
20140340073 | SIGNAL PROCESSING DEVICE AND MEASURING METHOD - A signal processing device and a measuring method are provided. A ring oscillator includes (2n+1) signal transmission circuits (n is an integer greater than or equal to 1). One of the signal transmission circuits comprises an inverter, a first transistor, and a second transistor; one of an input terminal and an output terminal of the inverter is connected to one of a source and a drain of the first transistor; one of a source and a drain of the second transistor is connected to a gate of the first transistor; an output of a k-th (k is an integer greater than or equal to 1 and less than or equal to 2n) signal transmission circuit is connected to an input of a (k+1)-th signal transmission circuit; and an output of a (2n+1)-th signal transmission circuit is connected to an input of a first signal transmission circuit. | 11-20-2014 |
20140347035 | METHOD FOR MEASURING THE FREQUENCY OF AN ELECTRICAL SIGNAL AND AN ELECTRICAL MEASURING SYSTEM - Described is an electrical measuring system with a six-gate circuit and a delay line. An electrical signal is fed from a resonator, at least one of directly and or via the delay line, to the six-gate circuit. The frequency of the signal is computed by the six-gate circuit in dependence on the length of the delay line. | 11-27-2014 |
20140354261 | METHOD, CIRCUIT AND INTEGRATED CIRCUIT FOR DETECTING RESONANCE FREQUENCY - A method, circuit, and integrated circuit for detecting resonance frequency is disclosed in which a first operational amplifier circuit receives an input signal and provides an output signal for a resonance circuit to store energy, a zero crossing comparator circuit samples a discharge current of the resonance circuit and transforms the sampled current into a sampled voltage and outputs a square signal to a digital signal processor based on the sampled voltage, and the digital signal processor obtains a resonance frequency based on the square signal. | 12-04-2014 |
20150008898 | MONITORING AN ELECTRICAL POWER SUPPLY NETWORK - A method and a device are provided for monitoring an electrical power supply network. A temporal frequency change value is determined for at least two sections or for at least two points of the power supply network. The frequency change value indicates the respective temporal frequency change of the network frequency. A conclusion is drawn regarding a possible islanding within the power supply network, and a warning signal which indicates the possible islanding within the power supply network is generated when the difference between the frequency change values, exceeds a predetermined frequency change threshold value. | 01-08-2015 |
20150015239 | APPARATUS AND METHOD FOR REAL TIME HARMONIC SPECTRAL ANALYZER - In one embodiment, a measuring device may comprise two oscillators. The first oscillator may generate a local reference signal in a frequency detector to detect a fundamental frequency of the AC. The second oscillator may generate two substantially mutually orthogonal sinusoid signals having the selected frequency. The measuring device further may comprise a first group of multipliers that mixes the two sinusoid signals with a current and a voltage data signal of the AC respectively, a group of low-pass filters for removing high frequency components from the multiplication products, a second group of multipliers for mixing the filtered multiplication produces respectively, and a plurality of adders each to sum together a pair of multiplication products of the second group of multipliers. | 01-15-2015 |
20150054490 | ELECTRICAL COMBINER BOX WITH IMPROVED FUNCTIONALITY - A combiner box capable of monitoring energy output from a photovoltaic system (or other alternative energy system) having improved troubleshooting functionality, the ability to independently verify utility charges, and a mechanism for reducing incorrect readings of energy output and consumption due to noise and interference. | 02-26-2015 |
20150061639 | Dead-Time Selection In Power Converters - A method is provided of determining a time interval between switching events for a switching device in a power converter, the switching device being for coupling a direct current (DC) source to provide an alternating current (AC) output at a particular switching frequency. The method comprises selecting an initial length of a time interval between a first switching event and a second, subsequent switching event for the switching device and obtaining a current measurement value for the switching device when the time interval between the first switching event and the second, subsequent switching event takes said initial length. The method further comprises changing the length of the time interval between the first switching event and the second, subsequent switching event and obtaining a current measurement value for the switching device when the length of the time interval is changed. The current measurement values which have been obtained are used to detect generation of a current in the switching device. It is then determined, from the change made to the length of the time interval and the current measurement values obtained, a length (t | 03-05-2015 |
20150097550 | CABLE DETECTION IN A PIN CONSTRAINED CONNECTOR - A method of detecting a cable connected to a first device includes generating a second signal within the first device, and outputting the second signal onto an input-only pin of a cable connector on the first device, wherein the input-only pin is assigned to receive a first signal from a driver on a second device when a cable is connected from the second device to the cable connector, and wherein the second signal has a frequency that is at least four times greater than the frequency of the first signal. The method further comprises determining that a cable is not connected to the cable connector in response to the detecting the second signal on a wire coupled to the input-only pin, and determining that the cable is connected to the cable connector in response to detecting a signal other than the second signal. | 04-09-2015 |
20150323579 | DUTY CYCLE DETECTOR AND SEMICONDUCTOR INTEGRATED CIRCUIT APPARATUS INCLUDING THE SAME - A duty cycle detector may include a rising clock detection unit enabled in response to a first control signal; a falling clock detection unit enabled in response to a second control signal with a different activation timing from the first control signal; and a comparison unit configured to compare an output signal of the rising clock detection unit to an output signal of the falling clock detection unit in response to a comparison enable signal, and output a duty cycle detection signal. | 11-12-2015 |
20150331026 | FREQUENCY DETECTION CIRCUITS - A frequency monitoring circuit includes a monitoring lead, a D-type flip-flop, and a one-shot. The D-type flip-flop has a switchable logic state, a clear input, and a clock input. The one-shot has an input and an output connected to the D-type flip-flop clear input. The monitoring lead connects the one-shot input to the latch clock input for switching the logic state of the D-type flip-flop based on change in voltage applied to the monitoring lead. | 11-19-2015 |
20150331027 | METHOD AND APPARATUS FOR DETERMINING CHARACTERISTICS OF AN INPUT SIGNAL - Aspects are directed to systems and methods of determining a value of a characteristic related to timing between sequential events of an input electronic signal using an input capture counter having a maximum counting value, the input electronic signal having an expected variable period between events whose value is between a maximum period value and a minimum period value with a delta period value equal to a difference between the maximum period value and the minimum period value. | 11-19-2015 |
20150362535 | METHOD FOR DETERMINING THE AVERAGE VALUE OF A PERIODIC OR QUASI-PERIODIC VOLTAGE SIGNAL - A method for determining an average value of a periodic or quasi-periodic voltage signal that can be transmitted on a communication bus with a transmission period greater than the period of the signal. The method includes acquiring measurements of the signal with a measurement period corresponding to the transmission period of the average value on the bus, obtaining the average value from the acquired measurements, applying, for each measurement, a variable delay, defining a time of measurement within the measurement period, relative to a reference time, and obtaining the average value from the result of the measurement made at each time of measurement and from the results of the measurements made previously. | 12-17-2015 |
20160047847 | LOW POWER HIGH RESOLUTION OSCILLATOR BASED VOLTAGE SENSOR - Systems and methods for sensing voltage on a chip are described herein. In one embodiment, a voltage sensor comprises a voltage-controlled oscillator coupled to a voltage being sensed, and a plurality of transition detectors, wherein each of the transition detectors is coupled to a different location on the oscillator, and wherein each of the transition detectors is configured to count a number of transitions at the respective location over a time period. The voltage sensor also comprises an adder configured to add the numbers of transitions from the transition detectors to generate an output value that is approximately proportional to the voltage. | 02-18-2016 |
20160069939 | LOW POWER SMALL AREA OSCILLATOR-BASED ADC - In one embodiment, a method for measuring current comprises generating a sensor current based on a current being measured. The method also comprises converting a combined current into a first frequency, wherein the combined current is a sum of the sensor current and a common-mode current, and converting the first frequency into a first count value. The method further comprises converting the common-mode current into a second frequency, converting the second frequency into a second count value, and subtracting the second count value from the first count value to obtain a current reading. | 03-10-2016 |
20160077134 | ENHANCED RADAR DETECTION FOR COMMUNICATION NETWORKS - A network device is disclosed for determining whether a received signal includes a radar signal. The network device can determine a beginning of a pulse within the signal as the time instant at which a power level of the signal exceeds an upper threshold. The network device can determine an end of the pulse as the time instant at which a drop in the power level associated with the signal exceeds a power drop threshold. The network device determines whether the pulse is part of the radar signal based, at least in part, on the beginning of the pulse and the end of the pulse. In some embodiments, the network device may cancel a DC offset from the signal prior to determining whether the signal includes a radar signal. | 03-17-2016 |
20160103154 | INTERNAL CHIRP GENERATOR WITH TIME ALIGNED ACQUISITION IN A MIXED-DOMAIN OSCILLOSCOPE - A mixed-domain oscilloscope (MDO) includes a signal generator configured to generate a test signal having a span ranging from a user-configurable start frequency to a user configurable stop frequency, an output channel coupled to the signal generator and configured to transmit the test signal, an RF input channel configured to receive a return signal based on the test signal, an acquisition section configured to acquire and digitize the return signal as an acquisition record, and a ramp busy signal generator configured to substantially time-align the acquisition record with the test signal. The test signal includes a chirp signal that is a linearly swept sine wave that spans between the user-configurable start frequency and the user-configurable stop frequency. Methods include calibrating the chirp signal, connecting the MDO in various test configurations relative to external return loss bridge and DUT equipment, and performing measurements such as S21 (db), S11 (db), and distance-to-fault type measurements. | 04-14-2016 |
20160103164 | IDENTIFICATION OF A POWER SOURCE IN A MULTIPLE POWER SOURCE SCENARIO AND CHARACTERIZATION OF LOADS - Identification of a power source in a multiple power source scenario and characterization of loads. Embodiments herein relate to loads being supplied by multiple power sources and more particularly to identifying the power source supplying power to the load. Embodiments herein disclose a method and system for determining a power source providing power to a load, wherein the load is connected to a plurality of power sources. Disclosed herein is a method and system for characterizing at least one load currently connected to at least one power supply. | 04-14-2016 |
20160139182 | SINE WAVE ANALYSIS METHOD AND APPARATUS - Provided, is an apparatus and method for sampling or otherwise processing an alternating wave. A sensor senses a value of the alternating wave at a plurality of equally-spaced times during a period of the alternating wave. These equally-spaced times are determined independent of at least one of a frequency and a phase of the alternating wave. A controller determines, independently of the frequency and the phase of the alternating wave, a desired value of the alternating wave pertinent to a predetermined application of the apparatus based on the value of the alternating wave sensed by the sensor. | 05-19-2016 |
20160202297 | SYSTEMS AND METHODS FOR SIGNAL QUANTIZATION | 07-14-2016 |
20190146017 | Fast Frequency Calculator | 05-16-2019 |