| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 12/30/1986 | US4633170 Bragg cell spectrum analyzer |
| 12/30/1986 | EP0205554A1 Interlaced digital video input filter/decimator and/or expander/interpolator filter. |
| 12/23/1986 | USRE32314 Frequency control circuits such as for use in modulation measurement |
| 12/16/1986 | US4630228 Transmission line analyzer for automatically identifying the severities and locations of multiple mismatches |
| 12/16/1986 | US4629981 Meter overdrive protection circuit |
| 12/16/1986 | US4629915 Frequency discrimination circuit |
| 12/10/1986 | EP0204310A2 Method of measuring the frequency of a wave |
| 12/09/1986 | US4628255 AGC technique for spectrum analyzers |
| 12/09/1986 | CA1215139A1 Frequency to current converter circuit |
| 12/04/1986 | WO1986007157A1 Portable spectrum analyzer |
| 12/04/1986 | WO1986007156A1 High speed digital frequency counter |
| 11/20/1986 | EP0202163A2 Spectrum analyzer and logarithmic amplifier therefor |
| 11/20/1986 | EP0201692A1 Method and device making use of it for the processing of a measured voltage with a band-limited processing circuit |
| 11/12/1986 | EP0200836A2 Channelized fiber optic receiver |
| 11/12/1986 | CN85204684U Piezoelectric ceramic-type reso-meter |
| 11/11/1986 | US4622478 Power frequency detection system |
| 10/29/1986 | EP0091466B1 Method and apparatus for registering the use of a television receiver in connection with at least one video tape player |
| 10/28/1986 | US4620167 Surface acoustic wave systems and methods |
| 10/28/1986 | US4620147 Signal detector |
| 10/23/1986 | WO1986006174A1 Heterodyne-type method and apparatus for measuring signals, having means for automatically correcting the detuning |
| 10/21/1986 | US4618981 Tone detector with pseudo phase locked loop |
| 10/21/1986 | US4618969 Digital ratemeter |
| 10/07/1986 | US4616173 Frequency counter |
| 09/23/1986 | US4613865 Radiation source identification system |
| 09/23/1986 | US4613807 Low-noise system for measuring frequency in multiphase power transmission systems |
| 09/17/1986 | CN86100930A Tone detector with pseudo phase locked loop |
| 09/17/1986 | CN85102595A Fast response counting ratio counter and moisture content detector |
| 09/16/1986 | US4612665 Graphic equalizer with spectrum analyzer and system thereof |
| 09/16/1986 | US4612657 Device for detecting momentary cutoff of AC power source |
| 09/16/1986 | US4611926 Time interval measuring instrument |
| 09/10/1986 | EP0194085A2 Tone detector with pseudo phase locked loop |
| 09/09/1986 | US4611165 Pulse RF frequency measurement apparatus |
| 09/09/1986 | US4611164 Spectrum analyzer with automatic peak frequency tuning function |
| 09/09/1986 | US4610540 Frequency burst analyzer |
| 09/03/1986 | EP0193453A1 Device for controlling a pulse period |
| 09/03/1986 | EP0193212A2 Method for processing as a frequency submitted measured value |
| 09/03/1986 | EP0192652A1 Frequency comparator circuits |
| 09/02/1986 | US4609990 Frequency measurement system |
| 08/21/1986 | EP0177557A4 Counting apparatus and method for frequency sampling. |
| 08/19/1986 | US4607217 Subsynchronous resonance detection |
| 08/19/1986 | US4607216 Apparatus for measurement by digital spectrum analyzer |
| 08/19/1986 | US4607215 Spectrum analyzer |
| 08/05/1986 | US4604719 Oscillator having a sixteen bit signal generation utilizing an eight bit processor |
| 08/05/1986 | US4604713 Tone detector and multifrequency receiver using said detector |
| 08/05/1986 | US4604588 Digital delay line tester |
| 07/29/1986 | US4603350 Interlaced digital video input filter/decimator and/or expander/interpolator filter |
| 07/29/1986 | US4603331 Method of identifying remote objects |
| 07/29/1986 | CA1208791A1 Real-time hierarchal pyramid signal processing apparatus |
| 07/09/1986 | EP0186936A1 Method and apparatus for evaluating auditory distortions of an audio system |
| 07/09/1986 | EP0186740A1 Power frequency detection system |
| 07/08/1986 | US4599580 Circuit for comparing two or more frequencies |
| 07/08/1986 | US4599567 Signal representation generator |
| 07/03/1986 | WO1986003921A1 Interlaced digital video input filter/decimator and/or expander/interpolator filter |
| 07/01/1986 | US4598251 Frequency to current converter circuit |
| 07/01/1986 | US4598247 Spectrum analyzer and analysis method for measuring power and wavelength of electromagnetic radiation |
| 06/24/1986 | US4597107 Modulation detector and classifier |
| 06/17/1986 | US4595991 Position measuring method and apparatus |
| 06/10/1986 | US4594555 Frequency selective sampling detector |
| 06/04/1986 | EP0182999A1 Self-arming, prescaling frequency counter system |
| 06/03/1986 | US4592367 Apparatus and method for digital rate averaging |
| 05/27/1986 | US4591241 Acousto-optical spectrum analyzer |
| 05/21/1986 | EP0181808A1 Spectrum analyser using surface wave dispersion filters |
| 05/21/1986 | EP0181565A1 Digital oscilloscope |
| 05/06/1986 | US4587483 Measurement of elapsed time for a predetermined frequency shift |
| 05/06/1986 | US4587482 Digital frequency meter for measuring radiation |
| 05/06/1986 | CA1204159A1 Frequency response display for use with a graphic equalizer |
| 04/16/1986 | EP0177557A1 Counting apparatus and method for frequency sampling. |
| 04/08/1986 | US4581713 Method of and arrangement for producing numerical values proportional to the frequency of measured pulses of a measured pulse train |
| 04/01/1986 | US4580281 Self-arming, prescaling frequency counter system |
| 03/26/1986 | EP0175515A1 Low distortion limiter circuit |
| 03/25/1986 | US4578653 Frequency selective filter circuit |
| 03/25/1986 | US4578638 Spectrum analyzer |
| 03/18/1986 | EP0112380A4 Frequency to current converter circuit. |
| 03/10/1986 | CN85100349A Self-adjustable universal eletionic counter |
| 02/27/1986 | WO1986001356A1 Frequency comparator circuits |
| 02/13/1986 | WO1986000997A1 Doppler signal analyzer |
| 02/04/1986 | US4568878 Analyzing frequencies that indicated present in an input signal |
| 02/04/1986 | CA1200316A1 Multiple simultaneous tone decoder |
| 02/04/1986 | CA1200282A1 Method and apparatus for sampling broad band spectra in fuel quantity measurement systems |
| 01/29/1986 | EP0169487A2 Frequency determining and lockon system |
| 01/29/1986 | CN85200143U Measuring device combining micro-computer with microwave net device and frequency scanistor |
| 01/29/1986 | CN85200036U Realtime spectrum analyzer for supersonic doppler signal of blood-flowing |
| 01/21/1986 | US4565983 Filter |
| 01/14/1986 | US4564805 Oscilloscope with integrated frequency counter and method of measuring frequency |
| 01/07/1986 | US4563638 Time selective frequency detection by time selective channel to channel energy comparison |
| 01/02/1986 | EP0166380A2 frequency selective filter circuit |
| 12/24/1985 | US4561021 Frequency determining apparatus |
| 12/18/1985 | EP0164710A2 Method for phase locked sampling during measurement of a periodic quantity and device for carrying out the method |
| 12/18/1985 | EP0164551A1 Circuitry for monitoring a pulsetrain |
| 11/13/1985 | EP0161040A1 Surface acoustic wave spectrum analyzer |
| 11/06/1985 | EP0160352A2 Dual homodyne detection system to measure asymmetric spectrum by using angle mirrors |
| 10/29/1985 | US4550381 Spectrometer gun |
| 10/22/1985 | US4548464 Frequency analyzer in planar waveguide technology and method of manufacture |
| 10/15/1985 | US4547727 Simultaneous signal detection for IFM receivers by transient detection |
| 10/15/1985 | US4547726 Means and method for measuring power system frequency |
| 10/15/1985 | CA1195389A1 Narrow band digital filter |
| 10/10/1985 | WO1985004487A1 Counting apparatus and method for frequency sampling |
| 10/08/1985 | CA1194972A1 Acousto-optical channelized processor |
| 10/01/1985 | US4544884 Period and frequency measuring instrument |
| 10/01/1985 | CA1194547A1 Electronic instrument for measuring the overall phase and amplitude distortion of a transmission channel |