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Class Information
Number: 455/263
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Local control of receiver operation > Local oscillator frequency control > Automatic > Utilizing particular local oscillator control > Discriminator or detector
Description: Subject matter wherein the control means comprises a device in which amplitude variations are derived in response to frequency or phase variations.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7299022 |
Carrier detecting circuit and infrared communication device using same |
Nov. 20, 2007 |
| 7297756 |
Melt-adhesives for sealing off rocks or building materials |
Nov. 20, 2007 |
| 7272368 |
System and method for reduced deviation time domain FM/PM discriminator to achieve a reduced bandwidth frequency or phase modulation communications channels |
Sep. 18, 2007 |
| 7224952 |
Charge pump having sampling point adjustment |
May. 29, 2007 |
| 7142818 |
Systems and methods for reducing radio receiver interference from an on-board avionics transmitter |
Nov. 28, 2006 |
| 7092689 |
Charge pump having sampling point adjustment |
Aug. 15, 2006 |
| 7054389 |
Carrier detection circuit and infrared ray remote control receiver |
May. 30, 2006 |
| 7013117 |
Analog power detection for gain control operations |
Mar. 14, 2006 |
| 6397048 |
Signal processing apparatus and communication apparatus |
May. 28, 2002 |
| 6140809 |
Spectrum analyzer |
Oct. 31, 2000 |
| 6091306 |
Circuit configuration with main and subordinate oscillators |
Jul. 18, 2000 |
| 6072997 |
Frequency discriminator for a direct conversion receiver |
Jun. 6, 2000 |
| 6064870 |
Interference detection circuit having amplitude frequency domain defined discrimination |
May. 16, 2000 |
| 5929716 |
High performance voltage controlled oscillator that is cost efficient |
Jul. 27, 1999 |
| 5793819 |
Radio communication terminal station |
Aug. 11, 1998 |
| 5654674 |
Oscillator control circuit with phase detection feedback |
Aug. 5, 1997 |
| 5552838 |
Apparatus for tuning offset signals by controlling a tuner based on a difference in frequency of signals tuned by that tuner |
Sep. 3, 1996 |
| 5548243 |
Demodulator for demodulating a single side band signal, a real zero single side band signal and a frequency modulated signal, and a carrier signal reproducing circuit for the demodulator |
Aug. 20, 1996 |
| 5438591 |
Quadrature amplitude modulation type digital radio communication device and method for preventing abnormal synchronization in demodulation system |
Aug. 1, 1995 |
| 5241687 |
Phase controlling phase of local subcarrier signal to correspond to transmitted pilot signal |
Aug. 31, 1993 |
| 5175881 |
FM signal detection apparatus with automatic gain control circuit connected to phase detector input terminal |
Dec. 29, 1992 |
| 4864252 |
Sample-and-hold phase detector for use in a phase locked loop |
Sep. 5, 1989 |
| 4777449 |
Threshold-extension FM demodulator apparatus and method |
Oct. 11, 1988 |
| RE32314 |
Frequency control circuits such as for use in modulation measurement |
Dec. 23, 1986 |
| 4610031 |
Receiver including surface acoustic wave amplifier |
Sep. 2, 1986 |
| 4607393 |
Receiver circuit comprising two phase control loops |
Aug. 19, 1986 |
| 4607392 |
Circuit for improving the tuning behavior of a receiver frequency control loop |
Aug. 19, 1986 |
| 4601061 |
Automatic frequency control circuit having an equalized closed loop frequency response |
Jul. 15, 1986 |
| 4580285 |
Scanning AM radio with discriminator-driven-scan-stop-circuit |
Apr. 1, 1986 |
| 4554679 |
Noise reduction system for a single sideband multiplex signal |
Nov. 19, 1985 |
| 4547902 |
Radio receiver comprising a frequency locked loop with audio frequency feedback, and a muting circuit |
Oct. 15, 1985 |
| 4504973 |
Automatic disabling of AFC/AFT controller during receiver circuit tuning |
Mar. 12, 1985 |
| 4466128 |
Automatically centered pulsed FM receiver |
Aug. 14, 1984 |
| 4426735 |
Radio receiver comprising a frequency locked loop with audio frequency feedback, and a muting circuit |
Jan. 17, 1984 |
| 4426732 |
Receiver having a surface elastic wave high frequency amplifier with a frequency-controlled pump oscillator |
Jan. 17, 1984 |
| 4424593 |
Suppressed carrier communications system |
Jan. 3, 1984 |
| 4403345 |
Device for detecting the tuning frequency of a frequency modulation radio receiver |
Sep. 6, 1983 |
| 4397039 |
Instantaneous phase tracking in single sideband systems |
Aug. 2, 1983 |
| 4386435 |
Space diversity receiver with means for combining signals from the two channels |
May. 31, 1983 |
| 4320533 |
Frequency stabilized downconverter facilitating output frequency alteration |
Mar. 16, 1982 |
| 4293818 |
Frequency modulation threshold extension demodulator utilizing frequency compression feedback with frequency drift correction |
Oct. 6, 1981 |
| 4263554 |
Frequency discriminator apparatus |
Apr. 21, 1981 |
| 4245354 |
Radio frequency regenerators |
Jan. 13, 1981 |
| 4241452 |
Automatic frequency control system |
Dec. 23, 1980 |
| 4220974 |
AFT circuit |
Sep. 2, 1980 |
| 4217552 |
Receiver |
Aug. 12, 1980 |
| 4206410 |
Automatic frequency control system for single sideband signal receiver |
Jun. 3, 1980 |
| 4092602 |
Automatic frequency control for FM-receiver |
May. 30, 1978 |
| 4087756 |
FM Feedback demodulator having threshold extension circuit with two-pole crystal filters |
May. 2, 1978 |
| 4063039 |
Stereo noise reduction circuit |
Dec. 13, 1977 |
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