| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 324760190 | Frequency spectrum analyzer | 67 |
| 20080231254 | SPECTRUM ANALYZER, SPECTRUM ANALYSIS METHOD AND RECORDING MEDIUM - A spectrum analyzer that measures a signal component for every frequency of an input signal includes a local signal generating section generating a local signal having a designated frequency, a multiplying section outputting a synthesized signal obtained by multiplying the local signal with the input signal, a band-pass filter through which a signal component having a prescribed frequency band of the synthesized signal is passed, an A-D conversion section outputting a digital output signal obtained by sampling and digitalizing the passed signal component, a spectrum generation section that passes a signal component within a measured frequency range of the input signal through the band-pass filter and generates a first frequency spectrum based on the digital output signal acquired from the signal component passed through the band-pass filter, and an elimination section generating a frequency spectrum free of noise based on the first frequency spectrum generated by the spectrum generation section. | 09-25-2008 |
| 20080265868 | Measurement Of Distortion In An Amplifier - Parametric measurement of first- and second-generation telecommunications equipment has been relatively straightforward. The evolution to more complex transmission schemes such as those proposed for third-generation (3G) telecommunications devices can employ the subject methods and apparatus and apply AM-PM test procedures to a multicarrier amplifier RF environment to properly characterize the parametric performance of these transmission systems, particularly those operating in a multicarrier environment. | 10-30-2008 |
| 20090009154 | WIDE-BAND ANTENNA COUPLED SPECTROMETER USING CMOS TRANSISTOR - To create a broad band spectrometer, a plurality of individual antenna based bolometers are fabricated on the surface of a single spectrometer chip, each bolometer having an individual antenna which is sized differently from all others, thus being responsive to a generally unique frequency of radiation. Each antenna is coupled to a related transistor, which is easily formed using CMOS technology. The antennas are connected to opposite sides of a transistor gate, thus creating a termination resistor for the particular antenna. Multiple outputs from the various antennas are then coupled, thus providing responsiveness to electromagnetic radiation of a very broad spectrum. | 01-08-2009 |
| 20090015237 | Classification technique for powered devices using selective frequency filtering - A method, performed by a power sourcing apparatus is provided. The method includes (a) providing an electronic signal to a powered device (PD) over a wire through a circuit device, the circuit device permitting current to flow at pre-determined frequencies, the pre-determined frequencies forming a first set of frequency components, (b) sensing the electronic signal over the wire to detect frequency components present in the electronic signal, the detected frequency components forming a second set of frequency components, and (c) classifying the electronic signal into one of a plurality of classes according to a pattern of frequency components present in the first and second sets. Apparatus for use in conjunction with the method are also provided. | 01-15-2009 |
| 20090015238 | Integrated Spectrum Analyzer Circuits and Methods for Providing On-Chip Diagnostics - Spectrum analyzer circuits and methods are provided which implement “zero-IF” (direct conversion) or “near-zero IF” (or very low IF) architectures that enable implementation of integrated (on-chip) spectrum analyzers for measuring the frequency spectrum of internal chip signals. An integrated spectrum analyzer circuit, which comprises a zero IF or near-zero IF framework, enables a low-power compact design with sufficient resolution bandwidth for on-chip implementation and diagnostics of internal chip signals. | 01-15-2009 |
| 20090045798 | Synchronization of Spectrum Analyzer Frequency Sweep and External Switch - A measuring receiver comprises a spectrum analyzer having a local oscillator for sweeping the measurement frequency of the spectrum analyzer through multiple frequency bands. A preselector has multiple filter paths with frequency bands corresponding to frequency bands of the spectrum analyzer. The filter paths for passing signals through the preselector and outputting filtered signals to the spectrum analyzer. Switches of the preselector switch between filter paths to switch in a filter path having a frequency band corresponding to a frequency band being swept by the spectrum analyzer. A controller delays the sweeping of the measurement frequency during intervals when the switches are switching between filter paths. | 02-19-2009 |
| 20090128123 | VECTOR/SIGNAL ANALYZER EQUALIZATION APPARATUS AND METHOD - Disclosed is a method of equalization of a vector/signal analyzer including: providing a structured test signal within a selected frequency range, the structured test signal comprising a plurality of frequency components each having a respective amplitude and phase; inputting the test signal to the analyzer; the analyzer operating to condition the test signal; determining information representative of frequency distortion of the conditioned test signal introduced by the analyzer; generating a set of equalization coefficients based on the information representative of the frequency distortion, the set of coefficients corresponding to the selected frequency range; and storing the set of equalization coefficients and the correspondence of the set of coefficients to the selected frequency range. | 05-21-2009 |
| 20090189594 | Detection and monitoring of partial discharge of a power line - There is provided a method that includes (a) acquiring a first spectral component of a single noise pulse on a power line, and a second spectral component of the single noise pulse, (b) determining that the single noise pulse is synchronous with a power voltage on the power line, (c) determining a first magnitude of the first spectral component, (d) determining a second magnitude of the second spectral component, and (e) determining a condition of the power line from the first and second magnitudes. There is also provided a system that employs the method. | 07-30-2009 |
| 20090195239 | FREQUENCY CHARACTERISTIC MEASURING APPARATUS - A frequency characteristic measuring apparatus capable of measuring a frequency characteristic of a device under test in which the frequency of an input signal and the frequency of an output signal differ from each other, capable of simplifying the configuration of a tracking generator and peripheral circuits associated with the tracking generator, and capable of simultaneously measuring the characteristics of the input signal and the output signal of the device under test. A spectrum analyzer | 08-06-2009 |
| 20090237069 | METHOD AND APPARATUS FOR DETERMINING A RESPONSE OF A DUT TO A DESIRED LARGE SIGNAL, AND FOR DETERMINING INPUT TONES REQUIRED TO PRODUCE A DESIRED OUTPUT - A method for determining input tones required to produce a desired output includes the step of extracting a linearization of a spectral map representing a device under test (DUT) that i) is under drive of a large signal having one or more fundamental frequencies with associated amplitudes and phases, and ii) produces an approximation of a desired output having at least one unwanted spectral component. The method includes the further step of using an inverse of the extracted linearization to determine the input tones required to produce the desired output under a given load condition. | 09-24-2009 |
| 20090302829 | SPECTRUM ANALYZER SYSTEM AND SPECTRUM ANALYZE METHOD - Provided is a spectrum analysis system that measures a signal component at each frequency of an input signal, comprising a sampling section that samples the input signal at prescribed bandwidths to digitize the input signal, and outputs a resulting digital output signal; a converting section that converts the digital output signal from the sampling section into the signal component at each frequency of a unit bandwidth; and an output section that (i) outputs the digital output signal output by the sampling section when a frequency span, which is a frequency range in which the measurement result of the signal component at each frequency of the input signal is output, is greater than or equal to a predetermined reference bandwidth and (ii) outputs the signal component at each frequency converted by the converting section when the frequency span is less than the predetermined reference bandwidth. | 12-10-2009 |
| 20100052652 | APPARATUS AND METHOD FOR SPURIOUS-FREE SIGNAL RANGE MEASUREMENT FOR RF CIRCUITRY - The present invention is directed to an apparatus and methodology for performing spurious-free dynamic range (SFDR) measurements on an RF circuit, such as a mixer, using a single analog input port. The present invention is designed for use when access to the intermediate frequency (IF) port in a radio frequency (RF) front-end circuit is not available, when the traditional two-port method for making an SFDR measurement is inadequate. Passing the analog input through a directional coupler between the RF combiner and the mixer facilitates the performance of the traditional third order intermodulation (IMD) test. Key differences between the single-port and traditional two-port setups are considered and examined, and experimental data obtained using the single-port setup is compared to data obtained using the traditional two-port set-up for different mixer models. Comparison of similar results yields confirmation and a calibration to account for the additional losses introduced by the directional coupler. | 03-04-2010 |
| 20100156391 | MEASURING DEVICE - The invention relates to a measuring device comprising a signal unit ( | 06-24-2010 |
| 20100213923 | PROCESS FOR MEASURING PEAK VALUES AND POWER OF AN AUDIO FREQUENCY SIGNAL - The process for measuring peak and power values of an audiofrequency signal S including:
| 08-26-2010 |
| 20100237851 | SYSTEM FOR COMPLEX IMPEDANCE MEASUREMENT - A measurement system is provided for measuring a complex transfer function of a system under test. The measurement system comprises a signal source for generating an input signal to be applied to the system under test, a signal detection device for detecting a response signal of the system under test in response to the input signal; and a signal analysing system for determining the gain and phase shift of the system under test by comparing the response signal to the input signal. The signal analysing system includes phase adjustment means to adjust a relative phase difference of the detected response signal and input signal; and curve fitting means to identify a phase difference adjustment of the phase adjustment means which gives the best fit of the response signal to the input signal. The phase measurement of the response signal is determined from the best fit phase difference adjustment. | 09-23-2010 |
| 20100289477 | MEASURING DEVICE AND MEASURING METHOD FOR MEASURING THE ENVELOPE POWER AND THE MEAN-POWER VALUE - A measuring device for measuring the envelope power and the mean-power value of a high-frequency signal. The measuring device includes a detector for detecting the high-frequency signal and for generating an analog detector signal, an analog/digital converter for generating a digital signal and an evaluation device for evaluating the digital signal. A dither supply device for the supply of a dither signal is disposed between the detector and the analog/digital converter, and a dither elimination device for eliminating the dither signal is disposed between the analog/digital converter and the evaluation device. The dither supply device supplies a different dither signal for the measurement of the envelope power than for the measurement of the mean-power value. | 11-18-2010 |
| 20100295531 | MEASURING DEVICE - The invention relates to a measuring device, especially for a machine tool and/or a manual measuring device, comprising a measuring unit ( | 11-25-2010 |
| 20110025296 | High Frequency Circuit Analyser - An analyser for measuring the response of an electronic device (DUT | 02-03-2011 |
| 20110074387 | METHOD AND APPARATUS FOR SPECTRUM DETECTION - A spectrum detection method, system and base station are provided, which relate to the field of communications technology, and improve the spectrum utilization in a cellular multi-hop network. The spectrum detection method includes: receiving an intermediate spectrum detection result sent by each node; and integrating the intermediate spectrum detection results to obtain a final spectrum detection result. The spectrum detection method, system, and base station are mainly applied to cellular multi-hop networks. | 03-31-2011 |
| 20110084686 | NATURE TONE RECOGNIZING METHOD AND APPARATUS - An apparatus and method to recognize tones from human singing or similar characteristics is described. | 04-14-2011 |
| 20110084687 | SIGNAL GENERATION CIRCUIT, FREQUENCY MEASUREMENT DEVICE INCLUDING THE SIGNAL GENERATION CIRCUIT, AND SIGNAL GENERATION METHOD - A signal generation circuit includes: a first signal source that generates a first signal; and a variable rate frequency divider section that generates a variable rate frequency-divided signal in which a first frequency-divided signal obtained by frequency-dividing the first signal by a first frequency dividing ratio and a second frequency-divided signal obtained by frequency-dividing the first signal by a second frequency dividing ratio temporally alternately appear in a specified mixing ratio. | 04-14-2011 |
| 20110193547 | METHOD AND APPARATUS FOR IDENTIFYING AND REDUCING SPURIOUS FREQUENCY COMPONENTS - A method for identifying and reducing spurious frequency components is provided. A method in accordance with at least one embodiment of the present disclosure may include generating a digital sinusoidal waveform at a direct digital synthesizer (DDS) and receiving the digital sinusoidal waveform at an audio digital-to-analog converter. The method may further include converting the digital sinusoidal waveform to an analog sinusoidal waveform containing spurious frequency components, combining the analog sinusoidal waveform with an analog distortion correction waveform to generate a composite output waveform and receiving the composite output waveform at notch filter circuitry. The method may also include filtering the composite output waveform to generate a filtered composite output waveform and amplifying a difference between the filtered composite output waveform and a signal from a circuit-under-test (CUT) to generate an amplified analog signal. The method may also include converting the amplified analog signal to an amplified digital signal. Of course, additional implementations are also within the scope of the present disclosure. | 08-11-2011 |
| 20120081105 | Signal Generation For Spectral Measurements - Embodiments related to signal generation for spectral measurements are described and depicted. | 04-05-2012 |
| 20120242324 | FREQUENCY ERROR DETECTION APPARATUS - Embodiments are provided: a known signal extraction circuit a distributing arrangement circuit which distributes a known signal in a fixed section; a frequency conversion circuit which causes the distributed output to be a frequency-domain signal; a delay detection circuit which determines an amount of phase variation between adjacent frequency components in the frequency-domain signal; a distributing arrangement circuit which distributes a signal of the same sequence as the known signal described above in a fixed section; a frequency conversion circuit which causes the distributed output to be a frequency-domain signal; a delay detection circuit which determines an amount of phase variation between adjacent frequency components in the frequency-domain signal; a correlation operation circuit which obtains a correlation value between two delay detection outputs; and a peak detection circuit which detects one or more high power peaks among the correlation values and obtain frequency difference from a reference value. | 09-27-2012 |
| 20130141076 | Spread Spectrum Clock Signal Detection System and Method - A spread spectrum clock signal detection system includes: a spread spectrum clock signal input terminal; a reference clock signal input terminal; a frequency difference detection module connected with the spread spectrum clock signal input terminal and the reference clock signal input terminal; a spread spectrum pulse detection module connected with the spread spectrum clock signal input terminal, the reference clock signal input terminal and the frequency difference detection module; a spread spectrum value calculating module connected with the spread spectrum pulse detection module; a spread spectrum value reference input terminal connected with the spread spectrum value calculating module; and an output module connected with the spread spectrum value calculating module, wherein the spread spectrum clock signal detection system judges whether the spread spectrum clock signal exists according to the information of the spread spectrum value with magnitude and direction. A spread spectrum clock signal detection method is also provided. | 06-06-2013 |
| 20130154611 | CHIRPED PULSE FREQUENCY-DOMAIN COMB FOR SPECTROSCOPY - A pulse train comprising chirped pulses of electromagnetic energy can be used to excite a sample, such as for spectroscopic analysis. The respective chirped pulses can include a frequency sweep across a first specified bandwidth during a respective chirped pulse duration, the respective chirped pulse duration establishing a first frequency-domain comb peak separation. A width of a frequency-domain comb peak can be established at least in part by a total duration of the pulse train, and a bandwidth of the first frequency-domain comb can be determined at least in part by the first specified bandwidth of the frequency sweep of the respective chirped pulses. | 06-20-2013 |
| 20130271112 | Adaptive Threshold Voltage For Frequency Input Modules - Systems and methods for an industrial I/O controller circuit for frequency input modules that measure the frequency of an electrical input signal using adaptive threshold voltage and/or adaptive hysteresis feedback are shown and described. The systems and methods provide advantages in that the I/O controller circuit can better distinguish between actual input pulses from the electrical input signal, as opposed to unwanted Electromagnetic Interference (EMI) induced input pulses. This maximizes the amount of EMI rejection, independent of the frequency of the moving machine, and results in less time to commission and adjust a sensor, fewer false frequency measurements and less system down time. | 10-17-2013 |
| 20140043014 | PHASE-LOCKED LOOP - A phase-locked loop and method for estimating a phase angle of a three-phase reference signal is disclosed, which includes an adaptive quadrature signal generator configured to calculate an estimated first state and an estimated second state of a model of an unbalanced three-phase system at a fundamental frequency of the reference signal on a basis of the reference signal and an estimated fundamental frequency; a reference frame transformation block configured to calculate a direct component and a quadrature component in a rotating reference frame synchronous with an estimated phase angle on a basis of the fundamental positive sequence component and the estimated phase angle, and configured to determine an estimate of an amplitude of the fundamental positive sequence component on the basis of the direct component; and an estimator configured to determine estimates of the estimated fundamental frequency and the estimated phase angle on the basis of the quadrature component. | 02-13-2014 |
| 20150015238 | Measurement System Utilizing a Frequency-Dithered Local Oscillator - An improved receiver system may include an input to receive an input signal, and a signal generating circuit to generate a desired oscillator signal that is a single sideband radio frequency signal of time varying frequency. The receiver may also include a downconversion stage to generate an intermediate frequency (IF) signal based on the input signal and the desired oscillator signal. A signal processing block in the receiver may be used to produce an output signal based on the IF signal by frequency shifting the IF signal by an amount that compensates for the time varying frequency of the desired oscillator signal. The desired oscillator signal may be generated using a vector signal generator that receives a control value from the signal processing block, converts the control value to a pair of analog input signals, and generates the desired oscillator signal by quadrature modulating the pair of analog input signals. | 01-15-2015 |
| 20150362538 | High Speed Adaptive Sweep Capable Digital Transceiver - This invention describes a method by which the frequency and the modulation characteristics of a wire or wirelessly transmitted signal can be identified in a matter of milliseconds with significantly higher speed and accuracy than with existing or prior art receivers and spectrum analyzers, without erroneous image signals. Such signals can be then demodulated and decisions made based upon the demodulated data. The system then can be reconfigured to act as a transmit-receive module, with the transmit frequency enabled to address many different applications. This has applications in, terrestrial and satellite communications, and defense. | 12-17-2015 |
| 324760210 | By Fourier analysis | 8 |
| 20080218153 | POWER WAVEFORM HARMONIC ANALYSIS USING SUMMED SAMPLES - Provided are methods and apparatus for characterizing a power waveform. Some such methods include sampling the power waveform to generate a plurality of samples and, for each of the samples, recursively processing the sample to generate an aggregate signal energy value, processing the sample to generate a harmonic component signal energy value associated with at least one target harmonic frequency, and accumulating the aggregate signal energy value and the component signal energy value with previously generated aggregate signal energy values and component signal energy values to generate an accumulated aggregate signal energy value and an accumulated harmonic component signal energy value. Methods also include characterizing the power waveform responsive to the accumulated aggregate signal energy value and the accumulated harmonic component signal energy value. | 09-11-2008 |
| 20090153132 | Methods and apparatus for computing and using a spectral map for performing nonlinear calibration of a signal path - In one embodiment, a spectral map for performing nonlinear calibration of a signal path is developed by 1) identifying a set of frequency locations for a set of particular output signal spurs that result from applying one-tone and two-tone input signals covering a bandwidth of interest to the signal path; 2) developing, based on the set of frequency locations, a spectral map for predistorting, in the frequency domain, signals that are applied to, or received from, the signal path in the time domain; and 3) saving the spectral map for performing nonlinear calibration of the signal path. | 06-18-2009 |
| 20100109639 | FREQUENCY SPECTRUM ANALYSIS SYSTEM AND METHOD - A frequency spectrum analysis system includes a control platform, a driver, and a controlled system. The control platform includes a first transmission device. The driver includes a second transmission device, a signal source, and a data logger. The first transmission device is connected to the second transmission device. The second transmission device is connected to the signal source. The signal source is connected to the data logger and the controlled system. The data logger is connected to the controlled system and the first transmission device. | 05-06-2010 |
| 20100176790 | Testing Method and Device for a Wireless Receiver - A testing method for a wireless receiver includes processing a test signal to generate an in-phase and a quadrature signal, performing a Fourier transform process to the in-phase signal and the quadrature signal to generate a first transformation result and a second transformation result, and displaying the first transformation result and the second transformation result by means of graphic, to generate a test result corresponding to the test signal. | 07-15-2010 |
| 20100271002 | DISCHARGE AMOUNT MEASURING DEVICE AND METHOD FOR ROTATIONAL ELECTRIC MACHINE - A discharge amount measuring device includes a power source, first and second sensors, a calibration wire, and a measuring portion. The power source applies a voltage to a coil of a rotational electric machine. The first sensor detects a current flowing through the coil. The calibration wire has an end connected to the coil. The second sensor detects a current flowing through the calibration wire. The measuring portion forms a calibration line based on a first waveform detected by the first sensor and a second waveform detected by the second sensor. The measuring portion calculates a discharge amount based on the calibration line. | 10-28-2010 |
| 20120105048 | SYSTEM AND METHOD FOR SPACE CONTROL AND REMOTE MONITORING - A system and method for space control and remote monitoring is disclosed. According to one embodiment, a frequency modulated signal is emitted from a radioscopic device having an antenna. The frequency of the reflected signal from a target is compared with the emitted frequency modulated signal to obtain a low-frequency signal. The low-frequency signal is processed to form signal pulsations spectrum using a fast Fourier transform. Each spectrum frequency represents a distance to the target. | 05-03-2012 |
| 20140028283 | METHOD OF EXTRACTING ZERO CROSSING DATA FROM FULL SPECTRUM SIGNALS - Methods and apparatus for using Fourier techniques to detect and isolate the fundamental frequency sweep of echolocation calls produced by bats, or of other narrow-band whistles as produced by other kinds of animals such as birds and whales. According to one example, a Fourier transform is applied on blocks of input samples to produce output frames, and a narrowband frequency modulated signal is detected and traced through the output frames. A filter is applied in each frame to attenuate frequencies above or below the narrowband signal, and an inverse Fourier transform is applied to produce an output signal. The resulting signal may then be analyzed with zero crossing techniques to measure the precise instantaneous frequency sweep. | 01-30-2014 |
| 20140167734 | METHOD AND DEVICE FOR DETECTING AIRCRAFT RADIO SIGNALS TRANSMITTED IN THE SAME CHANNEL SIMULTANEOUSLY - A method for detecting at least two amplitude-modulated transmitted signals contained in a received signal within the same frequency channel with respectively different frequency displacement determines from the received signal a modified received signal by means of a nonlinear signal processing. Following this, the spectrum of the modified received signal is determined by means of Fourier transform, and at least two transmitted signals contained in the received signal are detected if at least two first spectral lines each associated with carrier signals are significantly distinguishable within the determined spectrum from spectral components associated with noise signals and payload signals. | 06-19-2014 |
| 324760220 | Real-time spectrum analyzer | 4 |
| 20080211481 | Handheld spectral scanner - A handheld spectrum scanner has a radio module, a central processing unit (CPU), a display module, a power module for supplying power, and a switch setting module acting as controlling interfaces for inputting scan conductions. The radio module comprises an antenna, a filter amplifier, a transducer and a demodulator. The antenna receives frequency signals of wireless electric waves. The filter amplifier amplifies the frequency signals. The transducer and the demodulator analyze energy of the frequency signals and output scanned result to the CPU. The CPU compares variation of voltage level of the scanned result from the radio module based on scan conductions inputted by the switch setting module, and outputs determined result. The display module has a display for displaying the determined result from the CPU. | 09-04-2008 |
| 20080258706 | Wide-Bandwidth Spectrum Analysis of Transient Signals Using a Real-Time Spectrum Analyzer - A system and method for performing wide-band spectral analysis of transient signals using a real-time spectrum analyzer (RTSA). A frequency window is selected for RTSA acquisition, the frequency window being narrower in bandwidth than the frequency spectrum of interest. An RTSA is successively tuned to a plurality of different frequencies within the frequency spectrum of interest, where such successive tuning is controlled based on a characteristic of the signal. The RF signal is received, and, for each of the plurality of different frequencies, power data is acquired for the signal in a band centered on the frequency and having a bandwidth equal to that of the frequency window. A representation of the frequency spectrum of interest is then constructed from the power data acquired during the successive tunings of the RTSA. | 10-23-2008 |
| 20100039098 | SYSTEM FOR EXTRACTION AND ANALYSIS OF SIGNIFICANT RADIOELECTRIC SIGNALS - Embodiments of the invention relate to a system for extracting and analyzing radioelectric signals of interest. It includes an integer number N of channels. Each channel V | 02-18-2010 |
| 20100225301 | DEVICE, METHOD, PROGRAM, AND RECORDING MEDIUM FOR ERROR FACTOR DETERMINATION, AND OUTPUT CORRECTION DEVICE AND REFLECTION COEFFICIENT MEASUREMENT DEVICE PROVIDED WITH THE DEVICE - An error factor determination device includes an error factor recording unit which records error factors Eija in a signal generation system which includes a signal generation unit for generating a signal and an output terminal for outputting the signal, a reflection coefficient deriving unit which derives a reflection coefficient Xm of the output terminal based on measurement results R | 09-09-2010 |
| 324760230 | With mixer | 13 |
| 20080258707 | Test Method for Frequency Converters with Embedded Local Oscillators - A method is presented where the phase trace is offset for each sweep such that the first point is always at zero degrees. The resulting traces are then averaged. The average reduces the noise in the phase trace and results in a less noisy group delay trace. | 10-23-2008 |
| 20090160429 | FREQUENCY COMPONENT MEASURING DEVICE - It is possible to provide a frequency component measuring device capable of narrowing the range of transmission frequency of a local oscillator, preventing degradation of the level measurement accuracy, and measuring the level of a modulation wave. The device includes: a local oscillator ( | 06-25-2009 |
| 20090160430 | HAND-HELD MICROWAVE SPECTRUM ANALYZER WITH OPERATION RANGE FROM 9 KHz TO OVER 20 GHz - A spectrum analyzer is provided that includes components to achieve from below 9 kHz to above 20 GHz operation range while remaining hand-held. Components of the spectrum analyzer include an integrated precision stand-alone step attenuator that does not rely on printed circuit board (PCB) mounted circuit elements within the signal path. Further, a PIN diplexing switch separates signals into different base-band and highband paths. The baseband path includes a pre-amplifier for low frequency signals, while the higher frequency bands may not necessarily include a pre-amplifier. The baseband path further provides improved broadband termination of its 1 | 06-25-2009 |
| 20090179630 | Gated sweep in spectrum analyzers - A measurement technique that provides a full solution to the gated local oscillator sweep measurement and improves the accuracy of signal analyzers in gated sweep mode by pre-sweeping the local oscillator at the beginning of a gate pulse and over-sweeping the local oscillator at the end of each gate pulse. | 07-16-2009 |
| 20100244811 | High bandwidth oscilloscope for digitizing an analog signal having a bandwidth greater than the bandwidth of digitizing components of the oscilloscope - A method for improving bandwidth of an oscilloscope involves, in preferred embodiments, the use of frequency up-conversion and down-conversion techniques. In an illustrative embodiment the technique involves separating an input signal into a high frequency content and a low frequency content, down-converting the high frequency content in the analog domain so that it may be processed by the oscilloscope's analog front end, digitizing the low frequency content and the down-converted high frequency content, and forming a digital representation of the received analog signal from the digitized low frequency content and high frequency content. | 09-30-2010 |
| 20100259245 | 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. | 10-14-2010 |
| 20120161749 | METHOD FOR MEASURING ABSOLUTE MAGNITUDES AND ABSOLUTE PHASE RELATIONSHIPS OVER A WIDE BANDWIDTH - A new measurement system, with two receiver channels per measurement port, has been developed that provides absolute magnitude and absolute phase relationship measurements over wide bandwidths. Gain ranging is used at RF to provide optimum noise performance and a swept YIG preselector filter is used to avoid spurious signals. A new absolute vector error correction method is used to calibrate the measurement system in order to allow for absolute vector measurements, and it also removes the time-varying responses caused by the swept YIG preselector filters. A quasi-reciprocal mixer with a characterized non-reciprocal ratio is used to provide the absolute calibration standard. The two receiver channels can be adapted to a wide variety of applications, including wide bandwidth vector signal analyzer measurements, mixer measurements, and harmonic measurements. The two-channels can also be used as an absolute calibrated transmitter/reflectometer. | 06-28-2012 |
| 20120256616 | HAND-HELD MICROWAVE SPECTRUM ANALYZER WITH OPERATION RANGE FROM 9 KHz TO OVER 20 GHz - A spectrum analyzer that provides from below 9 kHz to above 20 GHz operation range while remaining hand-held. The spectrum analyzer includes an integrated precision stand-alone step attenuator that does not rely on printed circuit board (PCB) mounted circuit elements within the signal path. Further, a PIN diplexing switch separates signals into different base-band and highband paths. The baseband path includes a pre-amplifier for low frequency signals, while the higher frequency bands may not necessarily include a pre-amplifier. The highband path incorporates multi-throw MMIC PIN diode switches to selectively filter different bands of input signals. | 10-11-2012 |
| 20120299579 | TEST AND MEASUREMENT INSTRUMENT INCLUDING ASYNCHRONOUS TIME-INTERLEAVED DIGITIZER USING HARMONIC MIXING - A test and measurement instrument including a splitter configured to split an input signal having a particular bandwidth into a plurality of split signals, each split signal including substantially the entire bandwidth of the input signal; a plurality of harmonic mixers, each harmonic mixer configured to mix an associated split signal of the plurality of split signals with an associated harmonic signal to generate an associated mixed signal; and a plurality of digitizers, each digitizer configured to digitize a mixed signal of an associated harmonic mixer of the plurality of harmonic mixers. A first-order harmonic of at least one harmonic signal associated with the harmonic mixers is different from an effective sample rate of at least one of the digitizers. | 11-29-2012 |
| 20140292305 | MILLIMETER-WAVE BAND SPECTRUM ANALYSIS DEVICE AND ANALYSIS METHOD - An input signal Sx in a first millimeter-wave frequency band higher than 100 GHz is input to a millimeter-wave band filter | 10-02-2014 |
| 20140306688 | Method and Apparatus for a SuperSpeed USB Bus Powered Real-Time Spectrum Analyzer - An RF processing module that when coupled to a computer having appropriate signal processing software will function as a spectrum analyzer. The RF processing module has a first stage mixer and a switch that allows either port of the first stage mixer to be selected as the input and receive the RF signal. The RF processing module has a sample packing buffer that packs digitized signal samples into a fewer number of longer words and loads the words into a circular buffer and from thence to one of two DMA channels on a USB link. The circular buffer can be emptied faster than it can be filled, allowing the sample packing buffer to create time intervals for a USB controller to switch DMA channels. LO leakage through the mixer-to-IF path is used to self-calibrate the filter's frequency response as temperature and other environmental factors change. | 10-16-2014 |
| 20160003878 | Method and Apparatus for a SuperSpeed USB Bus Powered Real-Time Spectrum Analyzer - An RF processing module that when coupled to a computer having appropriate signal processing software will function as a spectrum analyzer. The RF processing module has a first stage mixer and a switch that allows either port of the first stage mixer to be selected as the input and receive the RF signal. The RF processing module has a sample packing buffer that packs digitized signal samples into a fewer number of longer words and loads the words into a circular buffer and from thence to one of two DMA channels on a USB link. The circular buffer can be emptied faster than it can be filled, allowing the sample packing buffer to create time intervals for a USB controller to switch DMA channels. LO leakage through the mixer-to-IF path is used to self-calibrate the filter's frequency response as temperature and other environmental factors change. | 01-07-2016 |
| 20160033563 | ELECTRONIC ARRANGEMENT AND VECTOR NETWORK ANALYZER CHARACTERIZED BY REDUCED PHASE NOISE - An electronic arrangement and method for providing a signal characterized by reduced phase noise having a signal source for providing a stimulus signal, a modulator coupled to the signal source for generating a modulated signal as function of the stimulus signal and a local oscillator signal, and a mixer combining the stimulus and modulated signals to generate a mixed signal that includes a component characterized by a mathematical difference of the stimulus signal and the modulated signal. The modulated signal substantially identical to the stimulus signal and being offset by a frequency of the local oscillator signal, so that the difference component of the mixed signal results in a local oscillator signal wherein the stimulus signal phase noise generated by the signal source has been mathematically cancelled. | 02-04-2016 |
| 324760240 | With sampler | 7 |
| 20100164475 | DEVICE AND METHOD FOR MEASURING THE FREQUENCY OF A SIGNAL CODED MODULATED CARRIER SIGNAL | 07-01-2010 |
| 20100225302 | Measured-Signal Repetition Frequency Detection Method, and Sampling Apparatus and Waveform Observation System Using the Method - In a method of detecting a repetition frequency of a measured signal, in order to detect the waveform repetition frequency of the measured signal with high accuracy even in the presence of a frequency fluctuation in the measured signal, the repetition frequency of the measured signal acquired by the conventional method is used as a provisional repetition frequency, and the frequency change amount of the specified signal obtained in the case where the measured signal is sampled sequentially with a sampling frequency greatly changed from the provisional sampling frequency to generate a frequency fold at the time of sampling is detected. Based on the detected frequency change amount of the specified signal and the change amount of the sample number indicating how many times the frequency fold has occurred in the process, the error contained in the sampling number with a frequency fluctuation contained in the measured signal is calculated. Then, based on the error contained in this sample number, the provisional repetition frequency of the measured signal is corrected, thereby calculating the regular repetition frequency of the measured signal. | 09-09-2010 |
| 20100225303 | METHOD AND DEVICE FOR MULTICHANNEL MULTIFREQUENCY ANALYSIS OF AN OBJECT - A method for multichannel multifrequency analysis of an object, applying a set of excitation signals to the object and sampling the response signal from the object, using uniform and non-uniform undersampling. Non-uniform sampling of the response signal is performed, i.e., the sampling is performed for two or more different frequencies in one observation time slot. Also, uniform sampling of the response signal is performed, i.e., the sampling of a signal, corresponding to one frequency, is performed for two or more channels within one observation time slot and then sampling the same signal for another frequency for two or more channels within the next observation time slot. | 09-09-2010 |
| 20100264902 | DETECTION AND ESTIMATION OF RADIO FREQUENCY VARIATIONS - A system includes a sampling module, a counter module, and a frequency characteristic module. The sampling module samples radio frequency (RF) signals on a first channel for a first predetermined period and a second predetermined period that is subsequent to the first predetermined period. The counter module increments first and second counts when the samples collected during the first and second predetermined periods reverse polarity, respectively. The frequency characteristic module determines a frequency of the RF signal based on at least one of the first and the second counts and determines frequency variation of the RF signal based on the first and second counts. | 10-21-2010 |
| 20110304318 | FREQUENCY-SCALABLE SHOCKLINE-BASED SIGNAL-SOURCE EXTENSIONS - A system is provided using one or more shocklines or non-linear transmission lines (NLTLs) to extend the bandwidth of an RF signal source. Extension of the RF bandwidth is achieved by means of multiplexing as well as frequency scaling. Frequency scaling tailors the performance of each NLTL for operation in a particular output frequency band(s) by adjusting the varactor spacing in the NLTL. Multiplexing amalgamates the output frequency bands of one or more NLTLs, thus resulting in a broad output frequency range. | 12-15-2011 |
| 20150042310 | METHOD FOR DETERMINING A SAMPLING TIME OF A SIGNAL, DEVICE FOR DETERMINING THE SAME, AND METHOD FOR DETERMINING A SAMPLING PARAMETER OF A SIGNAL - A method for determining a sampling time of a signal, the method including: determining a candidate sampling time of a signal for input to a sampling circuit; determining a resultant sampling time at which the sampling circuit samples the signal when input with the candidate sampling time; and determining a sampling time of the signal based on a noise shaping of a difference between the resultant sampling time and the candidate sampling time. | 02-12-2015 |
| 20160018447 | SAMPLING CIRCUITRY AND SAMPLING METHOD FOR A PLURALITY OF ELECTRODES - A sampling circuitry for a plurality of electrodes the circuitry comprising a plurality of charge amplifiers and a plurality of modulators, wherein each charge amplifier and each modulator, comprised in the plurality of charge amplifiers and the plurality of modulators, respectively, corresponds to an electrode of the plurality of electrodes, wherein each modulator is capable of generating a residue signal and a rough code corresponding to each sampled electrode of the plurality of electrodes, a multiplexer capable of receiving a plurality of residue signals generated by the plurality of modulators, a residue analog to digital converter capable of receiving a multiplexed residue signal from the multiplexer and outputting a digitized multiplexed residue signal, and a digital summation circuitry capable of receiving the digitized multiplexed residue signal and a plurality of rough codes, comprising each rough code corresponding to each sample electrode, and outputting a plurality of output codes. | 01-21-2016 |
| 324760250 | With slope detector | 2 |
| 20090115396 | Communicating with an Implanted Wireless Sensor - The present invention determines the resonant frequency of a 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 or set of frequencies and a predetermined amplitude. The energizing signal is coupled to the sensor via magnetic coupling and induces a current in the sensor which oscillates at the resonant frequency of the sensor. The system receives the ring down response of the sensor via magnetic coupling and determines the resonant frequency of the sensor, which is used to calculate the measured physical parameter. The system uses a pair of phase locked loops to adjust the phase and the frequency of the energizing signal. | 05-07-2009 |
| 20100117624 | NETWORK-DISTRIBUTED OSCILLOSCOPE AND METHOD OF OPERATION THEREOF - A system and method for achieving oscilloscope functionality over a network. In one embodiment, the system includes: ( | 05-13-2010 |
| 324760260 | Scanning-panoramic receiver | 1 |
| 324760270 | With particular sweep circuit | 1 |
| 20090085555 | SYSTEMS AND METHODS FOR PROVIDING SIGNAL ANALYSIS DATA - A method for displaying signal analysis data comprises performing a plurality of sweep operations upon a received signal. With the sweep operations, spectral analysis is performed upon a first frequency band of the received signal. Displays are rendered of data generated from the spectral analysis in the first band and a second band different from the first band simultaneously, and the displays in the first band and the second bands are updated according to the sweep operations. | 04-02-2009 |
| 324770110 | Nonscanning | 2 |
| 324760290 | With filtering | 2 |
| 20100141238 | MINIATURE RF CALIBRATOR UTILIZING MULTIPLE POWER LEVELS - A small light-weight battery operated calibrator device provides a precise sine wave output for use in calibration of test equipment, such as a RF Power Meter or a Spectrum Analyzer. The calibration device includes two power levels, one −40 dBm and one 0 dBm. The purpose of the two power levels is to obtain a slope and offset for correction of the RF power measuring device being calibrated. Operation indication LED lights are provided to indicate which of the two powers are in use, and if battery power is below acceptable levels. Miniature low power components including a crystal oscillator and a divide by 2 integrated circuit that generates a precise square wave and a low pass filter for converting the square wave into a precise sine wave allows the calibrator to be battery operated and stored as a calibration component. | 06-10-2010 |
| 20120274309 | METHOD FOR AUTOMATICALLY SETTING FREQUENCY SPAN IN A SPECTRUM ANALYZER - Embodiments of this invention include a test and measurement instrument and associated methods for automatically setting frequency span in a spectrum analyzer. For example, starting with a high reference level, the power level can be automatically measured for each band. If a suitable minimum power is not found in one of the bands, the reference level can be automatically and iteratively decreased until the suitable minimum power is found, or until the most sensitive power level is reached. This assures enough sensitivity to correctly determine the signal power level and not make decisions based on noise. When power on any band is greater than the predefined noise criteria, then the band having the highest power level can be selected, and the center frequency and span for the band measuring the most power can be automatically set. | 11-01-2012 |
