| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 09/08/1988 | DE3706126A1 Method and device for determining the frequency of a scalar measurement value |
| 09/07/1988 | WO1988006737A1 Electro-optic measurement (network analysis) system |
| 09/06/1988 | US4769798 Successive period-to-voltage converting apparatus |
| 08/31/1988 | EP0280421A1 Circuit arrangement for detecting a critical frequency of input pulses |
| 08/31/1988 | EP0280389A2 Tranking YIG tuned filter-mixer |
| 08/17/1988 | EP0278718A2 Time variant frequency correction technique |
| 08/17/1988 | EP0278669A2 Methods and apparatus for frequency response analysis |
| 08/17/1988 | EP0278163A2 Signal viewing instrumentation control system |
| 08/10/1988 | EP0277638A2 Successive period-to-voltage converting apparatus |
| 08/09/1988 | US4763025 Frequency discrimination circuit |
| 08/02/1988 | US4761604 Identification of carrier frequency for pulsed signals |
| 07/27/1988 | EP0275974A2 Methods of and apparatus for measuring the frequency response of optical detectors |
| 07/26/1988 | US4760536 Autoranging frequency sensor |
| 07/19/1988 | US4758962 Electrical power line and substation monitoring apparatus and systems |
| 07/19/1988 | US4758783 Compensation network for compensating the frequency response of a spectrum analyzer |
| 07/12/1988 | US4757253 Circuit arrangement for frequency analysis of received signals which lie in a wide overall frequency band |
| 07/05/1988 | US4755795 Adaptive sample rate based on input signal bandwidth |
| 07/05/1988 | US4755745 Incoherent light optical processor |
| 07/05/1988 | CA1238954A1 Frequency comparator circuits |
| 06/29/1988 | EP0272965A1 Frequency-to-voltage converter |
| 06/21/1988 | US4752728 Tunable resonant sensing means to sense a particular frequency in a high energy charged particle beam and generate a frequency-domain signal in response |
| 06/16/1988 | DE3641590A1 Phase shift detector |
| 06/15/1988 | EP0271301A2 Time interval to digital converter with smoothing |
| 06/14/1988 | US4751576 Digital circuit for classifying the frequency of a signal in frequency ranges |
| 06/08/1988 | EP0269827A1 Digital measuring apparatus |
| 06/07/1988 | US4749277 Methods of and apparatus for measuring the frequency response of optical detectors |
| 06/01/1988 | EP0269309A2 A circuit for determining frequency response |
| 06/01/1988 | EP0268796A2 Static electricity meter |
| 06/01/1988 | CN87211277U High-seed fourier transformation algorithm type frequency spectrum analyser |
| 05/31/1988 | US4748399 Multichannel phase noise measurement system |
| 05/26/1988 | DE3638568A1 Device for analysing the transmission quality of digital radio links |
| 05/25/1988 | EP0268447A2 Improvements in or relating to frequency response analysis |
| 05/24/1988 | US4747095 Use in a digital communications system |
| 05/24/1988 | US4746820 Pulse frequency responsive switch |
| 05/19/1988 | WO1988003652A1 Linear position sensor |
| 05/17/1988 | US4745361 Electro-optic measurement (network analysis) system |
| 05/17/1988 | US4745356 Method and apparatus for quickly and precisely measuring the frequency of a signal |
| 05/17/1988 | CA1236914A1 Interlaced digital video input/filter/decimator and/or expander/interpolator filter |
| 05/10/1988 | CA1236529A1 Enhanced frequency determination for spectrum analyzers and the like |
| 05/03/1988 | US4742577 Device and method for signal transmission and optical communications |
| 05/03/1988 | US4742458 Method and apparatus for performing pattern recognition analysis |
| 05/03/1988 | US4742248 Random signal isolation circuit |
| 04/27/1988 | EP0264381A1 Enhanced frequency determination for spectrum analyzers |
| 04/26/1988 | US4740790 Antenna polarization measuring methods |
| 04/21/1988 | DE3727636A1 Circuit arrangement for the rapid digital measurement of frequency |
| 04/19/1988 | US4739251 Analysis circuit for an amplitude-modulated electric signal comprising a frequency transposer |
| 04/13/1988 | EP0263745A1 Method and device for measuring the frequency of an electrical signal |
| 04/12/1988 | US4737705 Linear position sensor using a coaxial resonant cavity |
| 03/22/1988 | US4733364 Period detecting circuit |
| 03/22/1988 | US4733169 Digital frequency detector |
| 03/22/1988 | US4732043 System and method for obtaining digital outputs from multiple transducers |
| 03/08/1988 | US4730257 Apparatus for analyzing signals, to obtain parameters of constituents |
| 03/01/1988 | US4728816 Error and calibration pulse generator |
| 03/01/1988 | CA1233512A1 Phase-locked sampling of a periodic signal |
| 02/25/1988 | DE3628740A1 Method for suppressing mutual interference in pulse-processing systems |
| 02/24/1988 | EP0256811A2 Obtaining digital outputs from multiple transducers |
| 02/23/1988 | US4727270 Noise immune circuit for use with frequency sensor |
| 02/17/1988 | EP0255838A1 Signal processing system |
| 02/16/1988 | US4725774 Integrated interferometric acousto-optic spectrum analyzer |
| 02/09/1988 | US4724421 Time interval to digital converter with smoothing |
| 02/04/1988 | DE3720634A1 Frequency discriminator |
| 02/02/1988 | US4722596 Acousto-optic analyzer with dynamic signal compression |
| 01/28/1988 | DE3719954A1 Verfahren zur bestimmung der zeitlichen aenderung mehrerer spektrallinien von signalverlaeufen Method for the determination of the temporal aenderung several spectral lines of signalverlaeufen |
| 01/27/1988 | EP0254388A2 Frequency-measuring electrical apparatus |
| 01/26/1988 | US4721958 Real-time pulse processor |
| 01/26/1988 | CA1232023A1 Method and apparatus for supervising digital radio transmission line |
| 01/20/1988 | EP0253482A1 Measuring adjacent channel power |
| 01/19/1988 | US4720674 Doppler signal analyzing apparatus |
| 01/19/1988 | US4720673 Spectrum analyzer and logarithmic amplifier therefor |
| 01/13/1988 | EP0252620A1 Spectrum analyser |
| 01/12/1988 | US4719581 Signal processing unit |
| 01/12/1988 | US4719413 For determining the quality of signal transmission through an array |
| 01/07/1988 | EP0250917A1 Method for signal transmission and optical communications |
| 01/07/1988 | EP0250682A2 Pulse measurement circuit |
| 01/05/1988 | US4718104 Filter-subtract-decimate hierarchical pyramid signal analyzing and synthesizing technique |
| 12/29/1987 | US4716363 Exponential decay time constant measurement using frequency of offset phase-locked loop: system and method |
| 12/29/1987 | US4716362 Surface wave dispersive filter spectrum analyzer |
| 12/22/1987 | US4715000 Digital phase-locked loop and frequency measuring device |
| 12/15/1987 | US4713782 Method and apparatus for measuring a transfer function |
| 12/09/1987 | EP0248737A1 Circuit for analysing an electric amplitude-modulated signal comprising a frequency converter |
| 12/08/1987 | US4712059 Broadband optical processor for determination of frequency and time of arrival of multiple signals |
| 12/03/1987 | DE3617936A1 Arrangement for digital voltage measurement |
| 12/02/1987 | EP0247654A2 Noise immune circuit for use with frequency sensor |
| 12/01/1987 | US4710721 Apparatus for monitoring the period of separation of impulses |
| 12/01/1987 | US4710702 Heterodyne type signal-measuring method and a measuring apparatus including automatic detuning correction means |
| 12/01/1987 | US4710653 Edge detector circuit and oscillator using same |
| 11/25/1987 | EP0246355A2 Error and calibration pulse generator |
| 11/24/1987 | US4709407 Band discriminating method in a receiver |
| 11/17/1987 | US4707653 Frequency measurement circuit |
| 11/10/1987 | US4706290 Method and apparatus evaluating auditory distortions of an audio system |
| 11/10/1987 | US4705969 High accuracy tachometer circuit |
| 11/05/1987 | WO1987006734A1 Method and apparatus for optical rf amplitude equalization |
| 11/04/1987 | EP0244071A1 RF spectrum analysing receiver |
| 11/04/1987 | EP0243771A2 Method and arrangement for the quick and precise measurement of the frequency of a signal |
| 11/04/1987 | CN86108191A Enhanced frequency determination for spectrum analyzers and like |
| 11/03/1987 | US4704737 Compressive receiver having pulse width expansion |
| 11/03/1987 | US4704036 Pulse measurement circuit |
| 10/27/1987 | US4703267 High dynamic range in NMR data acquisition |
| 10/27/1987 | CA1228673A1 Apparatus for and method of, analysing signals |
| 10/15/1987 | DE3611689A1 Recording tester having an upstream-connected measurement converter |