| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 06/26/1984 | CA1169929A1 Maximum frequency detector |
| 06/20/1984 | EP0111396A1 Programmable trigger coupling circuit |
| 06/19/1984 | US4455617 Multiple simultaneous tone decoder |
| 06/19/1984 | US4455613 Technique of reconstructing and displaying an analog waveform from a small number of magnitude samples |
| 06/12/1984 | US4454531 Digital circuit for providing a binary signal on the occurrence of a predetermined frequency ratio of two signals |
| 06/12/1984 | US4454470 Method and apparatus for frequency measurement of an alternating current signal |
| 06/12/1984 | US4454434 Calibration and status monitor comparator apparatus and method |
| 06/12/1984 | US4453550 Method and means for detecting a periodic wave structure |
| 05/30/1984 | EP0109886A1 Acousto-optical device for analysing spectra |
| 05/29/1984 | US4451782 Spectrum analyzer |
| 05/29/1984 | US4451781 Moisture tester |
| 05/29/1984 | CA1168363A1 Speed measurement system |
| 05/09/1984 | EP0107884A1 Digital circuit for measuring the instantaneous frequency of a frequency-modulated or non modulated signal, as well as a television or radio receiver equipped with such a circuit |
| 05/08/1984 | CA1167107A1 Automatic im distortion test selector |
| 05/02/1984 | EP0107050A2 Signal generator for digital spectrum analyzer |
| 05/02/1984 | EP0106951A1 Position measuring method and device for performing this method |
| 05/01/1984 | US4446439 Frequency/voltage conversion circuit |
| 05/01/1984 | CA1166707A1 Stage for selecting the alternating signal with the largest amplitude between two signals with different frequencies |
| 04/24/1984 | US4445223 Apparatus and method for determining the presence and frequency of a periodic signal |
| 04/17/1984 | CA1165890A1 Sampling spectrum analyzer |
| 04/17/1984 | CA1165840A1 Apparatus and method for determining the presence of a periodic signal |
| 04/10/1984 | US4442500 Narrow band digital filter |
| 04/10/1984 | US4442406 Frequency monitor with adjustable tolerance |
| 04/10/1984 | US4441368 Method and means for determining ultrasonic wave attenuation in tissue |
| 04/03/1984 | CA1164960A1 Digitally controlled bandwidth sampling filter- detector |
| 03/20/1984 | US4438504 Adaptive techniques for automatic frequency determination and measurement |
| 03/20/1984 | US4438412 In a circuit arrangement |
| 03/20/1984 | US4438406 Signal processing means acting as a frequency range translator and as a filter |
| 03/20/1984 | US4438392 Device for sampling and holding the carrier frequency of short duration pulses |
| 03/20/1984 | CA1164066A1 Automatic intermodulation distortion analyzer |
| 03/15/1984 | WO1984001044A1 Multiple simultaneous tone decoder |
| 03/13/1984 | US4437057 Frequency detection system |
| 03/07/1984 | EP0102165A1 Speed detection apparatus and method |
| 02/28/1984 | US4434470 Speed measurement system with means for calculating the exact time period of a known quantity of speed pulses |
| 02/07/1984 | US4430618 Input buffer circuit |
| 02/07/1984 | US4430611 Frequency spectrum analyzer with phase-lock |
| 01/31/1984 | US4428224 Apparatus and method for testing of a rotary movement-electrical signal transducer system |
| 01/24/1984 | US4427938 Very-wide-band samplers |
| 01/24/1984 | US4427937 Method of measuring time constant using a spectrum analyzer |
| 01/17/1984 | US4426648 Simultaneous signal detection for IFM receivers by detecting intermodulation products |
| 01/11/1984 | EP0097845A1 Process and device for determining the distortion of the attenuation and of the group transit time of a measuring object, especially of a data transmission route |
| 01/11/1984 | EP0097754A1 Tone detector and multifrequency receiver using this detector |
| 01/05/1984 | WO1984000087A1 Frequency to current converter circuit |
| 01/03/1984 | US4424482 For encoding a pulse signal |
| 12/22/1983 | WO1983004438A1 Process and device for detecting frequency variations |
| 12/13/1983 | US4420809 Frequency determining apparatus |
| 12/13/1983 | US4419897 Apparatus for harmonic oscillation analysis |
| 12/07/1983 | EP0095732A1 Spectrum analyser |
| 11/22/1983 | US4417310 Apparatus for measuring distortion factor |
| 11/15/1983 | US4415854 Microwave spectrum analyzer with a synthesized local oscillator |
| 11/15/1983 | US4415767 Method and apparatus for speech recognition and reproduction |
| 11/08/1983 | US4414517 Non-ringing phase responsive detector |
| 11/08/1983 | US4414505 Microwave instantaneous frequency measurement apparatus |
| 11/08/1983 | US4414504 Fractional doppler counting |
| 11/01/1983 | US4412547 Neurological monitoring device |
| 10/25/1983 | US4412172 Method of measuring the thermal properties of a resonator |
| 10/19/1983 | EP0091466A1 Method and apparatus for registering the use of a television receiver in connection with at least one video tape player. |
| 10/18/1983 | US4410762 Dual mode tone detector circuit |
| 10/05/1983 | EP0090717A1 Speed measurement system |
| 10/05/1983 | EP0090134A1 Programmable fine frequency detector |
| 10/04/1983 | US4408289 Simplified monitoring apparatus for sensors in motor vehicles |
| 10/04/1983 | US4408158 Frequency transducer |
| 09/20/1983 | US4405897 Frequency deviation testing and adjusting system for frequency modulated oscillators |
| 09/20/1983 | CA1154094A1 Digital read-out meter circuit with variable meter update rate |
| 09/13/1983 | US4404520 Differential absolute equalization measurement circuit |
| 09/06/1983 | US4403185 Process and device for detecting frequency variations |
| 09/06/1983 | US4403184 Autocorrelation apparatus and method for approximating the occurrence of a generally periodic but unknown signal |
| 08/16/1983 | US4399409 Apparatus for testing the linearity of a frequency modulated oscillator |
| 08/16/1983 | US4399408 Apparatus for testing the linearity of a frequency modulated oscillator |
| 08/10/1983 | EP0085338A1 Device for determining the common frequency of two independently variable alternating values, in particular in a rotating field machine |
| 08/03/1983 | EP0084731A2 Frequency response displays for graphic equalizers |
| 07/27/1983 | EP0084394A1 Equipment for measuring and security command |
| 07/26/1983 | US4395762 Frequency counter |
| 07/20/1983 | EP0083823A1 Frequency synthesizing circuit |
| 07/19/1983 | US4394617 Swept-dip probe |
| 07/12/1983 | CA1149872A1 System and method for measuring the frequency or the frequency deviation of low frequency signals |
| 06/28/1983 | US4390838 Broadband measurement system |
| 06/21/1983 | US4389538 Multiplexer for single-octave data processor |
| 06/15/1983 | EP0081172A1 Radio receiving device |
| 06/09/1983 | WO1983002024A1 Technique of reconstructing and displaying an analog waveform from a small number of magnitude samples |
| 06/01/1983 | EP0080140A1 A method of and measuring instrument for measuring the overall phase and amplitude distortion of a transmission channel |
| 05/17/1983 | US4384365 Superheterodyne receiver frequency tracking circuit |
| 04/28/1983 | WO1983001526A1 Method and apparatus for determining the agreement between an analysis signal and at least one reference signal |
| 04/27/1983 | EP0077587A1 Narrow band digital filter |
| 04/27/1983 | EP0077558A1 Method and apparatus for speech recognition and reproduction |
| 04/26/1983 | CA1145473A1 Apparatus and method for testing of a rotary movement electrical signal transducer system |
| 04/26/1983 | CA1145399A1 Frequency counter |
| 04/19/1983 | US4380732 Signal spectrum display apparatus |
| 04/19/1983 | CA1144986A1 Frequency determining apparatus |
| 04/13/1983 | EP0076373A2 Planar waveguide technology frequency analyzer and method for the construction of a planar geodetic lens on or in a substrate |
| 03/29/1983 | US4377961 Fundamental frequency extracting system |
| 03/15/1983 | CA1143040A1 Method of controlling operation of rotary machines by diagnosing abnormal conditions |
| 03/01/1983 | CA1142237A1 Radioelectric apparatus for collecting data coming from several stations |
| 02/15/1983 | US4374358 Apparatus for measuring the oscillation frequency of a voltage controlled oscillator |
| 02/09/1983 | EP0071589A1 Lensless spectrum analyzer |
| 02/08/1983 | US4373203 Circuit arrangement and method for assessing communication activity on a particular radio communication channel |
| 02/08/1983 | US4372642 Multiple thin film absorption of reflected substrate modes in waveguide system |
| 01/25/1983 | US4370650 Tone detection circuitry |
| 01/25/1983 | US4370520 AM Stereo receiver |
| 01/25/1983 | US4369687 Pitch sensor |