Class / Patent application number | Description | Number of patent applications / Date published |
324760410 | Frequency comparison, (e.g., heterodyne, etc.) | 34 |
20080203998 | ON-CHIP POWER SUPPLY MONITOR USING LATCH DELAY SENSOR - A system for on-chip power supply monitoring by using a single latch delay sensor, including a first delay chain; a second delay chain; a latch circuit; a latch counter; and a slate machine for controlling a voltage; wherein the one or more outputs of the first and second delay chains are compared via a digital logic circuit to detect transients above or below predetermined limits in a single clock cycle; and wherein the one or more outputs of the first and second delay chains are compared via a digital logic circuit to detect transients above or below predetermined limits in a single clock cycle; and wherein a ratio of (i) a number of signals counted by the latch counter and (ii) a number of signals counted by the clock counter yields a statistical measurement of the power supply or ground transients. | 08-28-2008 |
20090115397 | Preventing False Locks in a System That Communicates With an Implanted Wireless Sensor - The present invention determines the resonant frequency of a wireless sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. The system energizes the sensor with a low duty cycle, gated burst of RF energy having a predetermined frequency. The system receives the ring down response of the sensor and determines the resonant frequency of the sensor, which is used to calculate a physical parameter. The system uses a pair of phase locked loops to adjust the phase and the frequency of the energizing signal. The system identifies false locks by detecting an unwanted beat frequency in the coupled signal, as well as determining whether the coupled signal exhibits pulsatile characteristics that correspond to a periodic physiological characteristic, such as blood pressure. | 05-07-2009 |
20090309574 | DEVICE FOR COUNTING OSCILLATIONS OF AN OSCILLATING TEMPORAL SIGNAL - A device for counting oscillations of an oscillating temporal signal. The device comprises means for counting all the alternate crossings of a positive threshold value and of a negative threshold value by a monitored time signal. | 12-17-2009 |
20100315061 | MEASUREMENT APPARATUS AND RECORDING MEDIUM - Provided is a measurement apparatus that measures power of a modulated signal that is modulated with a carrier signal having a prescribed frequency, comprising an AD converting section that outputs a digital modulated signal obtained by AD converting the modulated signal; a frequency converting section that converts the digital modulated signal into a frequency component signal representing a plurality of signal components at respective frequencies; a correction coefficient output section that outputs, for each frequency, a correction coefficient corresponding to a frequency characteristic of a transmission path on which the modulated signal is transmitted; a correcting section that corrects the signal component of each frequency in the frequency component signal using the correction coefficient of the corresponding frequency; and a power calculating section that calculates the power of the modulated signal based on the signal component of each frequency in the corrected frequency component signal. | 12-16-2010 |
20110025298 | DETERMINING DEGRADED INSULATING ABILITY IN INSULATION PROVIDED BETWEEN TWO OBJECTS OF AN INDUCTIVELY OPERATING ELEMENT - A method, device and computer program product for determining the change in insulating ability of the insulation provided between two objects of an inductively operating element, where at least one of the objects is a winding. The device includes an analyzing unit, which obtains a first frequency spectrum associated with a frequency response to a signal of varying frequency, where the signal of varying frequency can be applied to a first object of the inductively operating element and the frequency response is obtainable from a second object of the inductively operating element, compares the obtained first frequency spectrum with a second reference frequency spectrum, detects a peak in the obtained first frequency spectrum that does not appear in the second reference frequency spectrum, analyzes the shape of the detected peak, and determines the change in insulating ability based on the analyzed shape. | 02-03-2011 |
20110074390 | Signal Acquisition System Having Reduced Probe Loading of a Device Under Test - A signal acquisition system has a signal acquisition probe having probe tip circuitry coupled to a resistive center conductor signal cable. The resistive center conductor signal cable of the signal acquisition probe is coupled to a compensation system in a signal processing instrument via an input node and input circuitry in the signal processing instrument. The signal acquisition probe and the signal processing instrument have mismatched time constants at the input node with the compensation system providing pole-zero pairs for maintaining flatness over the signal acquisition system frequency bandwidth. | 03-31-2011 |
20110163736 | METHOD TO DETECT CLOCK TAMPERING - This invention relates to a method of receiving a first potentially unreliable clock signal having a first frequency; receiving a second reliable clock signal having a second frequency; wherein the first frequency and the second frequency have an expected relationship; determining whether the first potentially unreliable clock signal has changed with respect to the second reliable clock signal by: determining an actual relationship between the first potentially unreliable frequency and the second reliable frequency; and generating an alarm signal if the actual relationship is different to the expected relationship. | 07-07-2011 |
20110215795 | DETECTOR AND DETECTION METHOD - A detector obtains an output signal from an input signal containing a target signal and outputs the output signal. The detector includes an amplifier configured to receive the input signal and the output signal, compare the input signal to the output signal to output a comparison result; an envelope generator configured to weight a first value and a second value having a sign opposite to that of the first value in accordance with the comparison result, integrate the weighted first value and the weighted second value, and output an integration result as the output signal; and a controller configured to control the envelope generator in accordance with the input signal. The controller controls the envelope generator to mitigate an increase in an absolute value of the integration result when the input signal contains a frequency component other than a frequency component of the target signal. | 09-08-2011 |
20120194169 | dF/dT TRIGGER SYSTEM AND METHOD - A dF/dT trigger system and method includes instantaneously triggering on a frequency deviation of a data signal, which can be associated with an SSC signal. After receiving a signal at an input terminal of a test and measurement instrument, the signal is low-pass filtered and transmitted to trigger circuitry. When a frequency deviation rate in the filtered signal exceeds or crosses one or more thresholds, a trigger event is produced. Also disclosed is a test and measurement instrument including an input terminal to receive the signal, input circuitry to receive and process the signal, and dF/dT trigger circuitry configured to receive the signal and produce a trigger event when a frequency deviation in the signal exceeds or crosses one or more thresholds. | 08-02-2012 |
20130106398 | GAIN MEASUREMENT CIRCUIT, GAIN MEASUREMENT METHOD, AND COMMUNICATION APPARATUS | 05-02-2013 |
20130147462 | FAST WIDEBAND FREQUENCY COMPARATOR - A frequency comparator outputs an input reference signal and a comparison target signal as pulse-form signals, and is charged or discharged with a voltage corresponding to the reference signal to output a reference voltage having a variable first frequency range, and charged or discharged with a voltage corresponding to the comparison target signal to output a comparison target voltage having a variable second frequency range. The frequency comparator compares the reference voltage having the first frequency range and the comparison output voltage having the second frequency range. | 06-13-2013 |
20130162241 | DETECTING MALICIOUS HARDWARE BY MEASURING RADIO FREQUENCY EMISSIONS - A method of testing an electronic device comprises measuring radio frequency emissions at a plurality of positions relative to a trusted unit of a particular electronic device during operation of the trusted unit, and measuring radio frequency emissions at the same plurality of positions relative to a second unit of the particular electronic device. For each of the plurality of positions, the radio frequency emissions measured from the second unit are compared to the radio frequency emissions measured from the trusted unit. The method then determines whether there is any frequency at which the measured amplitude of the radio frequency emissions from the second unit and the measured amplitude of the radio frequency emissions from the trusted unit exhibit a statistically significant difference. | 06-27-2013 |
20140028284 | METHOD FOR OBTAINING ELECTRIC POWER INFORMATION - A method for obtaining electric power information is applied with a power supply and includes following steps of coupling the power supply to an AC power source; detecting a voltage of the AC power source to obtain a first voltage; detecting a frequency of the AC power source to obtain a first frequency; and estimating an electric power information of the power supply in accordance with the first voltage and the first frequency. The electric power information includes an input current, an input voltage or an input power outputted from the AC power source to the power supply. | 01-30-2014 |
20140035560 | METHOD AND APPARATUS FOR LIMITING ACCESS TO AN INTEGRATED CIRCUIT (IC) - A method and apparatus for limiting access to an integrated circuit (IC) upon detection of abnormal conditions is provided. At least one of abnormal voltage detection, abnormal temperature detection, and abnormal clock detection are provided with low power consumption. Both abnormally low and abnormally high parameter values (e.g. abnormally low or high voltage, temperature, or clock frequency) may be detected. Abnormal clock detection may also detect a stopped clock signal, including a clock signal stopped at a low logic level or at a high logic level. Furthermore, abnormal clock detection may detect an abnormal duty cycle of a clock signal. A sampled bandgap reference may be used to provide accurate voltage and current references while consuming a minimal amount of power. Upon detection of an abnormal parameter value, one or more tamper indications may be provided to initiate tampering countermeasures, such as limiting access to the IC. | 02-06-2014 |
20140145707 | VOLTAGE FLUCTUATION DETECTION CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT - A voltage fluctuation detection circuit includes an oscillation circuit configured to receive an operation voltage and perform an oscillation operation, an operation voltage generation unit configured to reduce a detection target voltage and generate the operation voltage, and a fluctuation detection unit configured to measure an oscillation frequency of the oscillation circuit and detect a fluctuation of the detection target voltage. | 05-29-2014 |
20140176116 | QUANTIFYING SILICON DEGRADATION IN AN INTEGRATED CIRCUIT - A first instance and a second instance of an oscillating circuit are each formed as part of an integrated circuit and are used to monitor degradation over time of one or more portions of the integrated circuit. The first instance of the oscillating circuit is configured to be coupled to a power source during normal operation of the integrated circuit and the second instance is configured to be decoupled from the power source. Over the lifetime of the integrated circuit, the first instance undergoes degradation from use while the second instance of the oscillating circuit remains unpowered, therefore experiencing essentially no use-related degradation. During a testing operation, the second instance can be used as a reference circuit that accurately quantifies use-related degradation of the first instance of the oscillating circuit and, by extension, one or more portions of the integrated circuit. | 06-26-2014 |
20150008899 | METHODS AND SYSTEMS FOR ACCURACY IMPROVEMENT IN CURRENT COMPARATORS - Precision AC and DC voltage, current, phase, power and energy measurements and calibrations with current ranges from 1 uA to 20 kA and voltage ranges from 1V to 1000 kV are now performed with accuracies of better than one part per million. Continued demand for improved accuracy has led the inventors to address remnant magetization within the current comparators that form the basis of the measuring process within many of the measurement instruments providing the precision AC and DC measurements and calibrations. Accordingly, the inventors present current comparator and measurement system architectures together with control protocols to provide for correction of this remnant magnetization. | 01-08-2015 |
20150061640 | Method and Device for Sensorless Control of a Separately Excited Synchronous Machine - A method for sensorless control of a separately excited synchronous machine having a rotor includes the following steps: feeding a test signal on a parameter of an electrical current driving the rotor; measuring the parameter of the electrical current driving the rotor on an axis of the coordinate system describing the synchronous machine; determining an error signal by correlating the measured parameter of the electrical current driving the rotor with a temporally delayed test signal which is determined from the fed test signal; and adjusting a rotor angle as a reaction to the error signal if the error signal has a value not equal to zero. | 03-05-2015 |
324760420 | With sampler | 2 |
20130193952 | System and Method for Verifying the Operating Frequency of Digital Control Circuitry - A system and method are presented for verifying the operating frequency of digital control circuitry. The system and method according to the present disclosure provide for a digitally controlled system, such as an electrosurgical system, to confirm or verify its operating frequency using a single external device, and software and/or firmware. | 08-01-2013 |
20140159703 | SYSTEM AND METHOD FOR VERIFYING THE OPERATING FREQUENCY OF DIGITAL CONTROL CIRCUITRY - A system and method are presented for verifying the operating frequency of digital control circuitry. The system and method according to the present disclosure provide for a digitally controlled system, such as an electrosurgical system, to confirm or verify its operating frequency using a single external device, and software and/or firmware. | 06-12-2014 |
324760430 | With plural mixers | 1 |
20100007329 | DEVICE AND METHOD FOR THE ANALYSIS OF A MEASURED SIGNAL TRANSMITTED VIA A MULTI-CHANNEL SYSTEM - A device, in particular, a multi-channel oscilloscope, for the analysis of at least one measured signal transmitted via a multi-channel system, with several measurement channels. The device includes in each case a sampling device, a baseband mixing device, and a filter device, and an analysis device. The measured signal is supplied to the measurement channels and to the respective sampling devices for simultaneous sampling. The sampled measured signal is supplied to the baseband mixing devices connected downstream of the sampling devices for the mixing of the measured signal down into the baseband, to the filter devices connected downstream of the baseband mixing devices for the decimation of the sampled values of the measured signal in the baseband and to the analysis device connected to the filter devices for the analysis of the measured signal. | 01-14-2010 |
324760440 | With filtering | 9 |
20100213924 | MEASURING APPARATUS, TESTING APPARATUS AND MEASURING METHOD - Provided is a measurement apparatus that measures a characteristic of a filter, comprising a first transmission line that has the filter connected therein, the first transmission line receiving a multi-tone signal having signal components at a plurality of frequencies from an input end thereof, passing the multi-tone signal through the filter, and outputting the multi-tone signal from an output end thereof; a second transmission line that receives the multi-tone signal from an input end thereof, propagates the multi-tone signal therein, and outputs the multi-tone signal from an output end thereof; and a measuring section that calculates the characteristic of the filter based on the multi-tone signal output from the output end of the first transmission line and the multi-tone signal output from the output end of the second transmission line. | 08-26-2010 |
20110074391 | Signal Acquisition System Having a Compensation Digital Filter - A signal acquisition system has a signal acquisition probe having probe tip circuitry coupled to a resistive center conductor signal cable. The resistive center conductor signal cable is coupled to a compensation system in a signal processing instrument via an input node and input circuitry in the signal processing instrument. The signal acquisition probe and the signal processing instrument have mismatched time constants at the input node with the compensation system having an input amplifier with feedback loop circuitry and a compensation digital filter providing pole-zero pairs for maintaining flatness over the signal acquisition system frequency bandwidth. | 03-31-2011 |
20110074392 | Signal Acquisition System Having Reduced Probe Loading of a Device Under Test - A signal acquisition system has a signal acquisition probe having probe tip circuitry coupled to a resistive center conductor signal cable. The resistive center conductor signal cable of the signal acquisition probe is coupled to a compensation system in a signal processing instrument via an input node and input circuitry in the signal processing instrument. The signal acquisition probe and the signal processing instrument have mismatched time constants at the input node with the compensation system having an input amplifier with feedback loop circuitry and a shunt pole-zero pair coupled to the input circuitry providing pole-zero pairs for maintaining flatness over the signal acquisition system frequency bandwidth. | 03-31-2011 |
20110127990 | FREQUENCY RESPONSIVE BUS CODING - A data system | 06-02-2011 |
20140152293 | SENSING CIRCUIT - The present invention discloses a sensing circuit including a sensing device, a first amplifier circuit, a high-pass filter, a second amplifier circuit and a determination circuit. The sensing device produces a sensing signal. The first amplifier circuit reduces high-frequency components of the sensing signal and amplifies low-frequency components of the sensing signal to produce a first amplified signal. The high-pass filter removes the direct current of the first amplified signal to produce a filtered signal. The second amplifier amplifies low-frequency components of the filtered signal according to a first predetermined voltage to produce a second amplified signal. The determination circuit determines whether the second amplified signal is higher than a second predetermined voltage and lower than a third predetermined voltage, and produces a detection result when the second amplified signal is higher than the second predetermined voltage or lower than the third predetermined voltage. | 06-05-2014 |
20150115933 | OFFSET COMPENSATION FOR ZERO-CROSSING DETECTION - There is described a device for removing an offset from a signal, the device comprising (a) a frequency estimation unit ( | 04-30-2015 |
324760450 | Bandpass | 3 |
20090189595 | CIRCUIT FOR DETECTING THE DUTY CYCLE OF CLOCK SIGNALS - A circuit ( | 07-30-2009 |
20140239938 | LINE FREQUENCY DETECTOR - A line frequency detector receives an input signal representing a power source and detects a line frequency of the power source based on the input signal. The line frequency detector includes a first band pass filter having a pass band centered at an upper end of an expected frequency range of the power source and a second band pass filter having a pass band centered at a lower end of the expected frequency range. The input signal is filtered by the first and second band pass filters, generating a first characteristic signal and a second characteristic signal. The line frequency detector determines a characteristic ratio between the first characteristic signal and the second characteristic signal, and maps the characteristic ratio to the line frequency of the power source. | 08-28-2014 |
20150091547 | METHOD, DEVICE, SENSOR AND ALGORYTHM FOR DETECTION OF DEVICES STEALING INFORMATION FROM ATM DEVICES - Method for detection of skimming devices comprising detecting electromagnetic emissions by sensors of the invention located inside of ATM. Electromagnetic emission is monitored in broad band of 10 kHz to 30 MHz and narrow band, and only one determined frequency is passed through filters in the narrow band, and sensors' output is analyzed and processed according to algorithm of the invention. Alarm signal is generated upon achieving pre-assigned threshold chosen so that discriminating between useful signal and interference is not obstructed. The method is implemented by device comprising sensors for detecting electromagnetic emissions, microcontroller for controlling the sensors, master microcontroller for processing of sensors' output, and notifying module for sending signals to control center. According to the invention sensor is provided for detecting electromagnetic emissions comprising receiving, regulating, filtering and converting parts. | 04-02-2015 |
324760470 | Digital output | 4 |
20100052653 | Digital Oscilloscope Module with Glitch Detection - The present invention provides a digital oscilloscope with glitch detection, including a synchronous random access memory (RAM), a digital signal processing unit, coupled to the synchronous RAM, and a master control unit coupled to the digital signal processing unit. The digital signal processing unit includes an analog-to-digital (A/D) converter to digitize an analog signal and a digital signal processor. The digital signal processor includes a dual-port RAM, a plurality of processing blocks to process the digitized analog signal data, detect glitches in the digitized analog signal data, store the processed signal data in the synchronous RAM, create display data from the stored signal data, and store the display data in the dual-port RAM, and a communications interface to transmit the stored display data. The master control unit includes an internal communications interface coupled to the digital signal processor communications interface, an external communications interface, and a central processing unit to receive the display data over the internal communications interface and transmit the display data over the external communications interface. | 03-04-2010 |
20140232371 | APPARATUS AND METHOD FOR DETECTING FREQUENCY - There are provided an apparatus and a method for detecting a frequency, the apparatus including a signal converting unit removing a high frequency component from an input signal and then converting the input signal into a digital signal, an edge detecting unit detecting an edge of the digital to thereby generate an edge detection signal having a predetermined magnitude, and a frequency estimating unit generating a pulse signal based on the edge detection signal and averaging the pulse signal at a predetermined interval to thereby estimate a frequency of the input signal. | 08-21-2014 |
20140232372 | MEASUREMENT AND MODULATION IN REAL TIME OF THE ELECTRICAL CONSUMPTION OF A PLURALITY OF ELECTRICAL APPLIANCES - A method is provided for measuring and modulating in real time the electrical consumption of electrical appliances. The method includes measuring in real time the current consumed by each of the electrical appliances on each electrical line portion on which each electrical appliance is situated and extracting the frequency and the voltage of the electrical signal on each electrical line portion. The difference in frequency are calculated and an alert signal is generated associated with an electrical line portion when the difference in frequency on this electrical line portion is greater than a predetermined frequency threshold value (f | 08-21-2014 |
20140306689 | HIGH RESOLUTION CURRENT PULSE ANALOG MEASUREMENT - A measurement system includes a current source that is arranged to generate a current pulse to charge a capacitor as a function of an input clock signal. The accumulated charge on the capacitor is converted to a sample (e.g., resultant digital value) by an ADC (analog-to-digital converter). The samples can be aggregated as a distribution in order to estimate the jitter of the input clock signal. Variability of the measurement system can be minimized through calibrating the device-under-test at specific points of PVT (process, voltage, and temperature) conditions. A confidence metric such as a standard of deviation can be derived from the associated samples. The measurement system can be included on a substrate that includes the oscillator that generates the input clock signal. | 10-16-2014 |