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Class Information
Number: 329/309
Name: Demodulators > Phase shift keying or quadrature amplitude demodulator > Input signal combined with local oscillator or carrier frequency signal > Including phase or frequency locked loop > With parallel signal combiners (e.g., costas loop) > Including logic element (e.g., logic gate or flip-flop)
Description: Subject matter containing a component which performs a Boolean Algebraic operation.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7215190 |
Magnetic resonance imaging method involving sub-sampling |
May. 8, 2007 |
| 7109787 |
High-efficiency circuit for demodulating carriers in quadrature |
Sep. 19, 2006 |
| 6781448 |
Method and apparatus for demodulating data |
Aug. 24, 2004 |
| 6704344 |
Broad-brand MPSK spread spectrum communications receiver with carrier recovery and tracking using correlation techniques |
Mar. 9, 2004 |
| 6696889 |
Acquisition of MR signals using multiple-quantum-coherence transfer |
Feb. 24, 2004 |
| 6341146 |
Phase-shift-keying demodulator and demodulation method using a period-width windowing technique |
Jan. 22, 2002 |
| 6289063 |
QAM receiver with improved immunity to crosstalk noise |
Sep. 11, 2001 |
| 6169448 |
Digital demodulator |
Jan. 2, 2001 |
| 6151367 |
Digital demodulator |
Nov. 21, 2000 |
| 6097768 |
Phase detector for carrier recovery in a DQPSK receiver |
Aug. 1, 2000 |
| 6069524 |
FPLL with third multiplier in an analog input signal |
May. 30, 2000 |
| 6021159 |
Circuit for measuring transmission quality of demodulated digital signal transmitted under carrier modulation transmission system |
Feb. 1, 2000 |
| 5881111 |
Frequency sweep circuit |
Mar. 9, 1999 |
| 5757862 |
Demodulator, modulation and demodulation system, and demodulation method |
May. 26, 1998 |
| 5745004 |
FPLL with third multiplier in an AC path in the FPLL |
Apr. 28, 1998 |
| 5671254 |
Modulation, demodulation and antenna coupling circuits used in IC card reading/writing apparatus, and method of supplying power to the IC card |
Sep. 23, 1997 |
| 5652769 |
Costas loop and data identification apparatus |
Jul. 29, 1997 |
| 5614861 |
N-phase modulated signal demodulation system with carrier reproduction |
Mar. 25, 1997 |
| 5594389 |
Carrier regeneration circuit including area judging device |
Jan. 14, 1997 |
| 5528195 |
Selective type quadrature demodulator |
Jun. 18, 1996 |
| 5440268 |
AFC circuit for QPSK demodulator |
Aug. 8, 1995 |
| 5440266 |
Demodulating apparatus having quick pull-in synchronization facility at instantaneous disconnection of input signal |
Aug. 8, 1995 |
| 5440267 |
Demodulator |
Aug. 8, 1995 |
| 5373247 |
Automatic frequency control method and circuit for correcting an error between a received carrier frequency and a local frequency |
Dec. 13, 1994 |
| 5347228 |
BPSK demodulator using compound phase-locked loop |
Sep. 13, 1994 |
| 5341105 |
Quadratore demodulator circuit utilizing automatic frequency control signal and method thereof |
Aug. 23, 1994 |
| 5239561 |
Phase error processor |
Aug. 24, 1993 |
| 5214390 |
Method and apparatus for partial response demodulation |
May. 25, 1993 |
| 5202643 |
Demodulator for demodulating a .pi./4-shift DQPSK signal |
Apr. 13, 1993 |
| 5168511 |
Manchester data recorder with synchronously adjustable clock |
Dec. 1, 1992 |
| 5117195 |
Data referenced demodulation of multiphase modulated data |
May. 26, 1992 |
| 5093848 |
Method of controlling the frequency of a coherent radio receiver and apparatus for carrying out the method |
Mar. 3, 1992 |
| 5048053 |
Detecting and tracking circuit for component PN codes |
Sep. 10, 1991 |
| 4987375 |
Carrier lock detector for a QAM system |
Jan. 22, 1991 |
| 4980648 |
Local oscillator signal phase acquisition system for digital demodulator |
Dec. 25, 1990 |
| 4866395 |
Universal carrier recovery and data detection for digital communication systems |
Sep. 12, 1989 |
| 4757266 |
Demodulation system capable of establishing synchronization in a transient state |
Jul. 12, 1988 |
| 4755763 |
Demodulator capable of avoiding abnormal demodulation |
Jul. 5, 1988 |
| 4751478 |
Multilevel modulator capable of producing a composite modulated signal comprising a quadrature amplitude modulated component and a phase modulated component |
Jun. 14, 1988 |
| 4739284 |
Phase locked loop having fast frequency lock steering circuit |
Apr. 19, 1988 |
| 4703282 |
Digital demodulation system |
Oct. 27, 1987 |
| 4651108 |
Demodulation circuit having means for detecting phase difference |
Mar. 17, 1987 |
| 4628271 |
Differential phase shift keying demodulator |
Dec. 9, 1986 |
| 4620159 |
Demodulator for multiphase PSK or multilevel QAM signals |
Oct. 28, 1986 |
| 4614910 |
Quarternary differential PSK demodulator |
Sep. 30, 1986 |
| 4574246 |
Demodulator with AGC circuit for multi-level quadrature amplitude-modulated carrier wave |
Mar. 4, 1986 |
| 4571550 |
QAM Demodulator carrier recovery loop using n-m LSB's |
Feb. 18, 1986 |
| 4559499 |
Direct microwave demodulator of PSK signals with automatic gain control |
Dec. 17, 1985 |
| 4549142 |
Phase demodulator including variable phase shifter for controlling reference carrier |
Oct. 22, 1985 |
| 4546323 |
Quadrature amplitude demodulator comprising a combination of a full-wave rectifying circuit and binary detectors |
Oct. 8, 1985 |
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