| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 11/28/1995 | US5471396 Estimator of amplitude and frequency of a noisy-biased sinusoid from short bursts of samples |
| 11/28/1995 | US5471133 Digital device for measuring the frequency of an electrical signal |
| 11/22/1995 | EP0683398A1 Non-harmonic analysis of waveform data and synthesizing processing system |
| 11/22/1995 | CN2213342Y Digital frequency indicator for doubling circuit made of phase locked loop |
| 11/21/1995 | US5469466 System for highly repeatable clock parameter recovery from data modulated signals |
| 11/21/1995 | US5469171 HF background noise measurement in HF environments |
| 11/21/1995 | US5469148 Frequency monitoring device |
| 11/07/1995 | US5465417 Integrated barium-ferrite tuned mixer for spectrum analysis to 60 GHz |
| 11/07/1995 | US5465414 Automatic determination of the presence of a microwave signal and whether the signal is CW or pulsed |
| 10/31/1995 | US5463310 Instrument for measuring the frequency and power of a microwave signal |
| 10/31/1995 | US5463226 Electromagnetic wave detecting apparatus |
| 10/26/1995 | DE19520836A1 Measuring period and wavelength of dominant oscillations and waves |
| 10/18/1995 | CN1110462A Apparatus and method for evaluating audio distortions |
| 10/05/1995 | DE4411098A1 Spectrum or network analyser |
| 10/03/1995 | CA2011029C Frequency detector circuit |
| 09/28/1995 | WO1995025960A1 Method and apparatus for analyzing a waveform |
| 09/27/1995 | EP0527995B1 Electric circuit for measuring the frequency of laser doppler signals |
| 09/26/1995 | US5453834 Digital burst frequency translator |
| 09/21/1995 | DE4420348C1 Determn. of harmonics of fundamental oscillation of electrical signal |
| 09/20/1995 | EP0673014A2 Acoustic signal transform coding method and decoding method |
| 09/20/1995 | EP0672256A1 Method and apparatus for discriminating computer network signals |
| 09/19/1995 | US5452320 Method for detecting fine frequency deviation |
| 09/13/1995 | EP0671010A1 Method for measuring frequency modulation rate characteristics for a swept frequency signal. |
| 09/06/1995 | EP0670470A1 Pulse width modulation and signal averaging circuit for a meter driver |
| 08/31/1995 | DE19507826A1 Verfahren zur Feststellung einer Unregelmäßigkeit für elektrische Ausrüstungen, insbesondere für eine rotierende elektrische Maschine, und eine Vorrichtung zur Durchführung des Verfahrens A method for detecting an irregularity for electrical equipment, in particular for a rotating electric machine, and a device for carrying out the method |
| 08/30/1995 | CN1029647C Method and apparatus for monitoring subsynchronous oscillation in power system |
| 08/29/1995 | US5446681 Method of estimating property and/or composition data of a test sample |
| 08/29/1995 | US5446322 Apparatus and method for determining when the frequency of an alternating signal is below a predetermined threshold |
| 08/15/1995 | US5442278 Apparatus for detecting the frequency of an input signal by counting pulses during an input signal cycle |
| 08/10/1995 | WO1995021385A1 Phase testing device |
| 08/08/1995 | US5440602 Method and device for counting clock pulses for measuring period length |
| 08/08/1995 | US5440592 Method and apparatus for measuring frequency and high/low time of a digital signal |
| 08/08/1995 | US5440228 Simultaneous signals IFM receiver using plural delay line correlators |
| 08/01/1995 | US5438328 Circuit for measuring pulse width of remote control signal |
| 08/01/1995 | US5438254 Phase difference measuring device |
| 07/26/1995 | EP0664459A2 Waveform display apparatus for easily realizing high-definition waveform observation |
| 07/26/1995 | EP0664458A2 Waveform display apparatus for easily realizing high-definition waveform observation |
| 07/26/1995 | EP0664457A2 Waveform display apparatus for easily realizing high-definition waveform observation |
| 07/25/1995 | US5436927 Method and apparatus for testing frequency symmetry of digital signals |
| 07/25/1995 | US5436847 Method for determining a periodic pattern in a line spectrum |
| 07/19/1995 | EP0663745A1 System for highly repeatable clock parameter recovery from data modulated signals |
| 07/19/1995 | EP0663597A2 Dual comparator trigger circuit with independent voltage level adjustment |
| 07/18/1995 | US5434954 Waveform display apparatus for easily realizing high-definition waveform observation |
| 07/14/1995 | CA2123773A1 Dual comparator trigger circuit with independent voltage level adjustment |
| 07/12/1995 | EP0497847B1 A wide bandwidth rf spectrum analyser |
| 07/05/1995 | EP0660938A1 Full and partial cycle counting apparatus and method. |
| 07/05/1995 | EP0473664B1 Analysis of waveforms |
| 07/05/1995 | CN1104818A Synchronization circuit using a high speed digital slip counter |
| 07/04/1995 | US5430690 Method and apparatus for processing signals to extract narrow bandwidth features |
| 06/13/1995 | US5424631 Hybrid instantaneous frequency measurement compressive receiver apparatus and method |
| 06/06/1995 | US5422977 Apparatus and methods for the generation of stabilised images from waveforms |
| 06/01/1995 | WO1995015035A1 Method and apparatus for testing telecommunications equipment |
| 06/01/1995 | DE4403059C1 Single-pole phase testing device for MV and HV networks |
| 06/01/1995 | CA2171864A1 Method and apparatus for testing telecommunications equipment |
| 05/30/1995 | US5420516 Method and apparatus for fast response and distortion measurement |
| 05/30/1995 | US5420514 Swept signal analysis instrument and method |
| 05/30/1995 | US5420501 Frequency spectrum analyzer |
| 05/23/1995 | US5418821 Method and apparatus for sample-data receiver squelch |
| 05/18/1995 | WO1995013465A1 Electronic metering circuit |
| 05/17/1995 | EP0653070A1 High speed power analyzer |
| 05/16/1995 | US5416800 Mobile radio receiver for a radio transmission system |
| 05/03/1995 | EP0651259A1 Method and apparatus for measuring modulation acccuracy and a transmitted signal |
| 05/03/1995 | EP0650600A1 Hf background noise measurement in hf environments |
| 04/27/1995 | WO1995011456A1 Frequency counter and frequency counting method |
| 04/25/1995 | US5410196 Circuit for finding the frequency band of an input signal which might have different frequency bands |
| 04/19/1995 | EP0648357A1 High-speed processing apparatus and method, signal analyzing system, and measurement apparatus and method. |
| 04/06/1995 | DE4333393A1 Method for determining spectral frequency components of radio-frequency voltage signals |
| 04/05/1995 | EP0647017A1 Synchronization circuit using a high speed digital slip counter |
| 03/29/1995 | EP0645637A2 Circuit for generating pulses |
| 03/29/1995 | EP0645612A1 Method and apparatus for determining line frequency and detecting light sources of various frequencies |
| 03/21/1995 | US5400261 Method and apparatus for wave analysis and event recognition |
| 03/07/1995 | US5396444 Terminator keys having reciprocal exponents in a data processing system |
| 03/02/1995 | DE4328971A1 Method for receiver-side detection of an AC signal voltage transmitted via a communication line |
| 03/01/1995 | EP0640839A2 Apparatus and method for evaluating audio distortions |
| 02/28/1995 | US5394217 Method and apparatus for determining line frequency and detecting variable frequency light sources |
| 02/21/1995 | US5391982 Apparatus for automatically recognizing a frequency of a power supply and method thereof |
| 02/16/1995 | DE4327275A1 Method for digital processing for narrow-band signals with variable centre frequency |
| 02/15/1995 | EP0638869A1 Procedure for a high-resolution spectral analysis for multichannel observations |
| 02/15/1995 | EP0638811A2 Estimator of amplitude and frequency of a noisy biased sinusoid from short bursts of samples |
| 02/15/1995 | CN1027663C Count signal synchronous type no-crack counter |
| 02/08/1995 | EP0637753A2 Circuit device for detecting a frequency in a composite signal |
| 02/08/1995 | CN1027605C Three phase line-frequency harmonic wave analyzing circuit |
| 02/07/1995 | US5388053 Data processing method for obtaining data indicating pulse period |
| 02/02/1995 | DE4325680A1 Device for detecting a signal frequency and for controlling a display device |
| 01/26/1995 | DE4424135A1 Measuring device for electromagnetic waves |
| 01/24/1995 | US5384638 Sampling-type optical voltage detector utilizing movement of interference fringe |
| 01/24/1995 | US5384545 Sequential circuitry for recreating CW components from chirp-Z pulses |
| 01/18/1995 | CN2187796Y Digital wave-display spectrum analyzer |
| 01/17/1995 | US5383222 Feedback circuitry for recreating CW components from chirp-Z pulses |
| 01/17/1995 | US5383084 Circuit analyzing system |
| 01/11/1995 | EP0632899A1 Method and apparatus for time varying spectrum analysis |
| 01/10/1995 | US5381442 Coherent Fourier transform radiometer for determining the thickness distribution of an oil film on a body of water based on the brightness temperature of the oil film and water over a range of radiation frequencies |
| 01/10/1995 | US5381150 Partial intercept LPI (low probability of intercept) reconnaissance system |
| 01/03/1995 | US5379390 Computer-implemented method |
| 12/22/1994 | DE4320181A1 Spectrum analyser |
| 12/21/1994 | CN2185896Y Operating frequency harmonic analyzer |
| 12/15/1994 | DE4326524C1 Circuit arrangement for establishing the presence or absence of at least one frequency of known value in an input signal consisting of a plurality of frequencies |
| 12/14/1994 | EP0472524B1 Device for identifying traffic on a paired cable |
| 12/13/1994 | US5373236 Highly accurate zero crossings for frequency determination |
| 12/07/1994 | CN1096103A Frequency-measuring instrument |