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Class Information
Number: 329/308
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)
Description: Subject matter utilizing a plurality of signal combiners where the modulated input signal is combined with relatively phase shifted versions of the secondary oscillations, or where the secondary oscillations are combined with relatively phase shifted versions of the modulated input signal.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7456682 |
Demodulator and phase compensation method thereof |
Nov. 25, 2008 |
| 7426243 |
Preprocessing signal layers in a layered modulation digital signal system to use legacy receivers |
Sep. 16, 2008 |
| 7394874 |
Up/down conversion circuitry for radio transceiver |
Jul. 1, 2008 |
| 7194044 |
Up/down conversion circuitry for radio transceiver |
Mar. 20, 2007 |
| 7109787 |
High-efficiency circuit for demodulating carriers in quadrature |
Sep. 19, 2006 |
| 7019599 |
Apparatus for continuous phase quadrature amplitude modulation and demodulation |
Mar. 28, 2006 |
| 6980059 |
Data directed frequency acquisition loop that synchronizes to a received signal by using the redundancy of the data in the frequency domain |
Dec. 27, 2005 |
| 6931082 |
Digital phase locked loop |
Aug. 16, 2005 |
| 6895063 |
Frequency changer and digital tuner |
May. 17, 2005 |
| 6771713 |
Data aided carrier phase tracking system for precoded continuous phase modulated signals |
Aug. 3, 2004 |
| 6757336 |
Device and method for performing a carrier recovery |
Jun. 29, 2004 |
| 6717462 |
QPSK and 16 QAM self-generating synchronous direct downconversion demodulator |
Apr. 6, 2004 |
| 6707863 |
Baseband signal carrier recovery of a suppressed carrier modulation signal |
Mar. 16, 2004 |
| 6597900 |
Circuit arrangement providing impedance translation filtering |
Jul. 22, 2003 |
| 6570441 |
Incoherent demodulator and method of incoherently demodulating an IF signal |
May. 27, 2003 |
| 6563894 |
Method and apparatus for acquiring and tracking the sampling phase of a signal |
May. 13, 2003 |
| 6535560 |
Coherent adaptive calibration system and method |
Mar. 18, 2003 |
| 6466086 |
Quadrature demodulator with phase-locked loop |
Oct. 15, 2002 |
| 6433630 |
Phase shifter, and demodulator employing it |
Aug. 13, 2002 |
| 6356145 |
Demodulator circuit which demodulates a signal without any restriction from a clock signal |
Mar. 12, 2002 |
| 6297691 |
Method and apparatus for demodulating coherent and non-coherent modulated signals |
Oct. 2, 2001 |
| 6294952 |
Quadrature demodulator quadrature demodulation method and recording medium |
Sep. 25, 2001 |
| 6249559 |
Digital frequency phase locked loop (FPLL) for vestigial sideband (VSB) modulation transmission system |
Jun. 19, 2001 |
| 6208201 |
Recovery of a carrier signal from a modulated input signal |
Mar. 27, 2001 |
| 6191649 |
Quadrature demodulator and method for quadrature demodulation |
Feb. 20, 2001 |
| 6147560 |
Method and device relating to supervision and control of an oscillator signal |
Nov. 14, 2000 |
| 6125271 |
Front end filter circuitry for a dual band GSM/DCS cellular phone |
Sep. 26, 2000 |
| 6104237 |
Method for estimating phase in demodulator |
Aug. 15, 2000 |
| 6100755 |
Phase decision circuit |
Aug. 8, 2000 |
| 6091306 |
Circuit configuration with main and subordinate oscillators |
Jul. 18, 2000 |
| 6069524 |
FPLL with third multiplier in an analog input signal |
May. 30, 2000 |
| 6055280 |
High data rate digital demodulator and bit synchronizer |
Apr. 25, 2000 |
| 5963597 |
Data transmission apparatus |
Oct. 5, 1999 |
| 5956375 |
Fast-acting Costas loop |
Sep. 21, 1999 |
| 5939951 |
Methods and apparatus for modulating, demodulating and amplifying |
Aug. 17, 1999 |
| 5905405 |
Quadrature demodulation circuit with carrier control loop |
May. 18, 1999 |
| 5896061 |
Homodyne receiver and process for correcting the converted received signal |
Apr. 20, 1999 |
| 5881107 |
Transmission system for digital signals, and transmitter and receiver therefor |
Mar. 9, 1999 |
| 5861773 |
Circuit for detecting the locked condition of PSK or QAM |
Jan. 19, 1999 |
| 5822366 |
Transceiver and method for generating and processing complex I/Q-signals |
Oct. 13, 1998 |
| 5815541 |
Digital phase locked loop assembly |
Sep. 29, 1998 |
| 5812546 |
Demodulator for CDMA spread spectrum communication using multiple pn codes |
Sep. 22, 1998 |
| 5761251 |
Dual automatic gain control and DC offset correction circuit for QAM demodulation |
Jun. 2, 1998 |
| 5748046 |
Phase locked loop with controllable response time |
May. 5, 1998 |
| 5745004 |
FPLL with third multiplier in an AC path in the FPLL |
Apr. 28, 1998 |
| 5729173 |
Demodulation of quadrature amplitude modulation signals |
Mar. 17, 1998 |
| 5703526 |
Circuit for detecting the locked condition of PSK or QAM demodulators |
Dec. 30, 1997 |
| 5668498 |
Controlling FPLL polarity using pilot signal and polarity inverter |
Sep. 16, 1997 |
| 5656971 |
Phase demodulator having reliable carrier phase synchronization |
Aug. 12, 1997 |
| 5652768 |
Method of and circuit arrangement for demodulating a digital amplitude-modulated carrier signal |
Jul. 29, 1997 |
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