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Class Information
Number: 329/358
Name: Demodulators > Amplitude modulation demodulator > Input signal combined with local oscillator or carrier frequency signal (e.g., synchronous demodulator)
Description: Subject matter where the modulated signal input to the demodulator interacts therein with oscillations from a secondary source.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6927623 |
Amplitude-modulated signal receiving circuit |
Aug. 9, 2005 |
| 6847256 |
Electromagnetic transponder reader |
Jan. 25, 2005 |
| 6744309 |
Absolute value amplitude baseband detector |
Jun. 1, 2004 |
| 6735428 |
Wireless communication apparatus |
May. 11, 2004 |
| 6512799 |
Digital communication system and method for increased bit rates |
Jan. 28, 2003 |
| 6366164 |
Integrated circuit layout for LF - signal acquisition in the case of contactless data transmission |
Apr. 2, 2002 |
| 6363105 |
Flexible sliding correlator for direct sequence spread spectrum systems |
Mar. 26, 2002 |
| 6181198 |
Amplitude and phase demodulation circuit for signals with very low modulation index |
Jan. 30, 2001 |
| 5946358 |
Receiver circuit for a mobile communications system |
Aug. 31, 1999 |
| 5912929 |
Method and apparatus for performing carrier detection |
Jun. 15, 1999 |
| 5579338 |
Spread spectrum receiver using partial correlations |
Nov. 26, 1996 |
| 5548244 |
Method and apparatus for eliminating DC offset for digital I/Q demodulators |
Aug. 20, 1996 |
| 5541958 |
Clock recovery circuit of demodulator |
Jul. 30, 1996 |
| 5469126 |
I/Q-modulator and I/Q-demodulator |
Nov. 21, 1995 |
| 5452331 |
Symbol lock detection implemented with nonoverlapping integration intervals |
Sep. 19, 1995 |
| 5379456 |
Multiplying saw phase shift envelope detector |
Jan. 3, 1995 |
| 5339040 |
AM demodulation receiver using digital signal processor |
Aug. 16, 1994 |
| 5121057 |
Media flaw detection apparatus for a magnetic disk drive with squaring and summing of in-phase and quadrature-phase detected signals |
Jun. 9, 1992 |
| 5095363 |
Method of demodulating multi-standard TV signals and a circuit device for implementing the method |
Mar. 10, 1992 |
| 5052401 |
Product detector for a steady visual evoked potential stimulator and product detector |
Oct. 1, 1991 |
| 5029271 |
Superregenerative detector |
Jul. 2, 1991 |
| 5006811 |
Dual quadrature frequency converter |
Apr. 9, 1991 |
| 4955039 |
Quadrature receiver |
Sep. 4, 1990 |
| 4945313 |
Synchronous demodulator having automatically tuned band-pass filter |
Jul. 31, 1990 |
| 4943982 |
Baseband carrier phase corrector |
Jul. 24, 1990 |
| 4929905 |
Synchronous demodulation circuit for a carrier-modulated television signal |
May. 29, 1990 |
| 4907092 |
Modulating/demodulating circuit for multiplex recording/playback of data in a magnetic recording/playback system |
Mar. 6, 1990 |
| 4862098 |
Continuous-wave-modulation detectors using prediction methods |
Aug. 29, 1989 |
| 4833417 |
Synchronous demodulation system with digital output |
May. 23, 1989 |
| 4726069 |
A muiti-mode modulation and demodulation system and method |
Feb. 16, 1988 |
| 4677690 |
Baseband demodulator for FM and/or AM signals |
Jun. 30, 1987 |
| 4636736 |
Variable phase signal demodulator |
Jan. 13, 1987 |
| 4631485 |
Synchronous demodulator for amplitude modulated signals |
Dec. 23, 1986 |
| 4611177 |
Signal demodulator using a multiplying digital-to-analog converter |
Sep. 9, 1986 |
| 4560942 |
Demodulation circuit having triangular wave for blocking harmonics |
Dec. 24, 1985 |
| 4471311 |
Detector circuit having AGC function |
Sep. 11, 1984 |
| 4387398 |
Television video signal detector |
Jun. 7, 1983 |
| 4371747 |
AM Stereophonic decoder |
Feb. 1, 1983 |
| 4370676 |
Carrier regenerating circuit for a synchronous detector |
Jan. 25, 1983 |
| 4307347 |
Envelope detector using balanced mixer |
Dec. 22, 1981 |
| 4228546 |
AM Radio receiver |
Oct. 14, 1980 |
| 4167650 |
Stereo signal demodulating circuits |
Sep. 11, 1979 |
| 4163196 |
Demodulating apparatus with phase shift compensation |
Jul. 31, 1979 |
| 4130806 |
Filter and demodulation arrangement |
Dec. 19, 1978 |
| 4105981 |
Synchronous demodulation device |
Aug. 8, 1978 |
| 4074075 |
Circuit for demodulating a stereo signal |
Feb. 14, 1978 |
| 3971988 |
AM/FM receiver using spectral parameter estimators |
Jul. 27, 1976 |
| 3961135 |
Synchronized demodulation system |
Jun. 1, 1976 |
| 3940716 |
Double-balanced modulating and demodulating apparatus |
Feb. 24, 1976 |
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