| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 09/24/1985 | US4542657 Ultrasonic system for measuring the velocity of blood and similar liquids |
| 09/24/1985 | CA1194115A1 Electromagnetic signal receiver and processor for providing frequency data of received signals |
| 09/17/1985 | US4542470 Frequency determining and lock-on system |
| 09/17/1985 | US4542336 Method and apparatus for sampling broad band spectra in fuel quantity measurement systems |
| 09/17/1985 | US4541687 Signal processing system and method |
| 09/10/1985 | US4541105 Counting apparatus and method for frequency sampling |
| 09/10/1985 | US4541070 Pulse characteristic meter |
| 09/04/1985 | EP0153479A2 Data processing system |
| 09/03/1985 | US4539518 Signal generator for digital spectrum analyzer |
| 08/28/1985 | EP0153093A2 Isotropic acoustic wave substrate |
| 08/27/1985 | CA1192614A1 Process and device for detecting frequency variations |
| 08/20/1985 | US4536666 Trigger coupling circuit for providing a plurality of coupling modes |
| 08/06/1985 | US4534057 Frequency response display for use with a graphic equalizer |
| 08/06/1985 | US4533868 Electronic instrument for measuring the overall phase and amplitude distortion of a transmission channel |
| 08/06/1985 | US4533867 Method and apparatus for measuring high frequency signals |
| 08/06/1985 | US4533866 Circuit for automatically setting a predetermined frequency component of the sweep oscillator of a spectrum analyzer to a prescribed point of the frequency coordinates of a display device |
| 07/23/1985 | CA1190966A1 Circuit for monitoring the frequency of signal for controlling choppers of electric cars |
| 07/09/1985 | USRE31943 Multichannel coherent receiver |
| 07/09/1985 | US4527866 Acousto-optic transducer |
| 07/03/1985 | EP0146749A1 Method and circuit arrangement for determining the presence of at least one frequency of a known value in an input signal composed of multiple frequencies |
| 07/03/1985 | EP0146640A1 Period detection circuit |
| 07/02/1985 | US4527080 Digital phase and frequency comparator circuit |
| 07/02/1985 | CA1189723A1 Speed measurement system |
| 06/19/1985 | EP0145184A2 Apparatus for digitally controlled calibration of frequency response of amplifiers |
| 06/11/1985 | US4523289 Time interval measuring system |
| 06/11/1985 | CA1188735A1 Fast frequency measuring system |
| 06/04/1985 | US4521779 Decoding device |
| 06/04/1985 | US4521692 Motor generator shutdown circuit for extended ridethrough |
| 05/28/1985 | CA1188015A1 Tone detector and multifrequency receiver using said detector |
| 05/22/1985 | EP0142171A2 Frequency comparing circuit |
| 05/15/1985 | EP0141255A1 Method for measurement by digital spectrum analyzer |
| 05/14/1985 | US4517684 Method of and arrangement for providing numerical values indicative of relationsips between pulse train pulses |
| 04/24/1985 | EP0138693A1 Method and apparatus for supervising digital radio transmission line |
| 04/23/1985 | US4513385 Apparatus and method for suppressing side lobe response in a digitally sampled system |
| 04/16/1985 | US4511917 Determining agreement between an analysis signal and at least one reference signal |
| 04/16/1985 | US4511206 Lensless spectrum analyzer |
| 04/09/1985 | US4510622 High sensitivity millimeter-wave measurement apparatus |
| 04/09/1985 | US4510454 Apparatus for digitally controlled calibration of frequency response of amplifiers |
| 04/09/1985 | US4510440 Methods and apparatus for frequency response analysis |
| 04/03/1985 | EP0136114A2 Signal processing system |
| 03/26/1985 | US4507578 Frequency discriminating circuit |
| 03/26/1985 | CA1184604A1 Continuous variable frequency measurement apparatus |
| 03/12/1985 | US4504786 Signal detector |
| 03/12/1985 | US4504785 Sampling spectrum analyzer |
| 03/05/1985 | US4503388 Acousto-optic signal detection system |
| 03/05/1985 | US4503382 Method and device for centroid detection of a beam of electromagnetic energy |
| 03/05/1985 | US4503374 Speed detection apparatus and method |
| 02/26/1985 | US4501149 Micro fracture detector |
| 02/26/1985 | CA1183208A1 Measuring device for measuring the carrier frequency of short duration pulses |
| 02/13/1985 | EP0132807A2 Signal representation generator |
| 02/12/1985 | US4499588 System for converting the frequency of a pulse train to a binary number |
| 02/12/1985 | US4499433 Autolock for resonators for frequency standards |
| 02/12/1985 | US4499393 Surface acoustic wave spectrum analyzer |
| 01/29/1985 | CA1181879A1 Electronic tuning radio receiver |
| 01/29/1985 | CA1181811A1 Apparatus for testing the linearity of a frequency modulated oscillator |
| 01/29/1985 | CA1181810A1 Apparatus for testing the linearity of a frequency modulated oscillator |
| 01/29/1985 | CA1181809A1 Frequency deviation testing and adjusting system |
| 01/23/1985 | EP0131781A1 Frequency discrimination circuit |
| 01/22/1985 | US4495585 Method of and apparatus for indicating characteristics of undulating data |
| 01/17/1985 | WO1985000228A1 Period detection circuit |
| 01/15/1985 | US4494067 Fast frequency measuring system |
| 01/08/1985 | US4492917 Display device for displaying audio signal levels and characters |
| 01/08/1985 | CA1180812A1 Method and apparatus for speech recognition and reproduction |
| 12/11/1984 | US4488238 Selection stage of the AC signal of greater amplitude between two signals of different frequencies |
| 12/11/1984 | US4488123 Frequency synthesizer |
| 11/27/1984 | US4485452 Speed measurement system |
| 11/21/1984 | EP0125796A1 System and apparatus for monitoring and control of a bulk electric power delivery system |
| 11/20/1984 | US4484356 Apparatus and method for acquiring and processing radio signals received at different frequencies |
| 11/20/1984 | US4484035 Dual tone multi frequency digital detector |
| 11/13/1984 | US4482861 Waveform measurement and display apparatus |
| 10/31/1984 | EP0123039A1 Signal detector |
| 10/23/1984 | US4479255 Apparatus for acquiring and collecting radio signals coming from a plurality of stations |
| 10/23/1984 | US4479249 Apparatus for collecting and processing messages transmitted at different signal frequencies |
| 10/16/1984 | US4477773 Frequency measuring apparatus |
| 10/16/1984 | CA1176310A1 Method of measuring thermal properties of a resonator |
| 10/11/1984 | WO1984003949A1 Modulation detector and classifier |
| 10/09/1984 | US4476579 Electronic tuning radio receiver |
| 10/09/1984 | US4476498 Deviation detector for FM video recording system |
| 10/03/1984 | EP0120209A2 Method of detecting frequency in power system |
| 10/02/1984 | US4475074 Apparatus for determining the common frequency of two independently variable electrical a-c variables, especially in a rotating-field machine |
| 09/18/1984 | CA1174734A1 Period measurement system |
| 09/18/1984 | CA1174733A1 Period measurement system |
| 09/05/1984 | EP0117421A1 Process and apparatus for measuring weak noise frequency signals in a polyphase power transmission line |
| 08/29/1984 | EP0116625A1 Multiple simultaneous tone decoder. |
| 08/28/1984 | US4468766 Optical RF downconverter |
| 08/28/1984 | US4468614 Average frequency measuring apparatus |
| 08/21/1984 | US4467277 Programmable detector for tone signals |
| 08/21/1984 | US4467276 Arrangement for evaluating an optical beam |
| 08/08/1984 | EP0028103B1 A spectrum analyzer |
| 08/07/1984 | US4464624 Broadband optical spectrum analyzer |
| 08/02/1984 | WO1984002991A1 Apparatus and method for suppressing side lobe response in a digitally sampled system |
| 07/31/1984 | US4463425 Period measurement system |
| 07/17/1984 | US4460250 Acousto-optical channelized processor |
| 07/17/1984 | CA1171139A1 Dual mode tone detector circuit |
| 07/11/1984 | EP0113275A2 Spectrum display device for audio signals |
| 07/04/1984 | EP0112380A1 Frequency to current converter circuit. |
| 06/27/1984 | EP0041968B1 A measuring device for measuring the carrier frequency of short duration pulses |
| 06/26/1984 | US4456959 Period measurement system |
| 06/26/1984 | US4456877 Hybrid spectrum analyzer system |
| 06/26/1984 | US4456876 Frequency counter |