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Class Information
Number: 329/306
Name: Demodulators > Phase shift keying or quadrature amplitude demodulator > Input signal combined with local oscillator or carrier frequency signal
Description: Subject matter where the modulated signal input to the demodulator interacts therein with oscillations from a secondary source.


Sub-classes under this class:

Class Number Class Name Patents
329/307 Including phase or frequency locked loop 171


Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
7619466 Quadrature demodulator Nov. 17, 2009
7609784 Signal decoding method and apparatus with dynamic noise threshold Oct. 27, 2009
7593491 Quadrature single-mixer multi-mode radio frequency receiver Sep. 22, 2009
7558341 Carrier recovery apparatus and digital broadcast receiver using the same Jul. 7, 2009
7529314 Carrier phase detector May. 5, 2009
7463692 Device and method for symbol clock recovery in digital television Dec. 9, 2008
7430247 Carrier frequency detection for N-ary phase modulated signal Sep. 30, 2008
7336732 Carrier frequency detection for signal acquisition Feb. 26, 2008
7251295 Apparatus for recovering carrier Jul. 31, 2007
7245655 Dual antenna receiver Jul. 17, 2007
7242729 Signal decoding method and apparatus Jul. 10, 2007
7242337 Band-pass .DELTA.-.SIGMA. AD modulator for AD-converting high frequency narrow-band signal with higher precision and lower power consumption Jul. 10, 2007
7218850 Apparatus and method for monitoring signal-to-noise ratio in optical transmission systems May. 15, 2007
7177364 System, decoder and method for transmitting, receiving and decoding high-speed digital data signals with reduced electromagnetic emissions Feb. 13, 2007
7164327 Compensation of the IQ phase asymmetry in quadrature modulation and demodulation methods Jan. 16, 2007
7099647 Single chip direct conversion transceiver for reducing DC offset and method of manufacturing the same Aug. 29, 2006
7092687 Five-port topology for direct down-conversion Aug. 15, 2006
7031399 Demodulator having automatic quadrature control function Apr. 18, 2006
RE38932 Digital demodulator Jan. 10, 2006
6903603 Phase detection circuit and receiver Jun. 7, 2005
6879646 Quadrature amplitude modulation demodulator and receiver Apr. 12, 2005
6868129 Demodulator for a radio receiver and method of operation Mar. 15, 2005
6861900 Fast timing acquisition for multiple radio terminals Mar. 1, 2005
6833755 Modulator and demodulator Dec. 21, 2004
6813310 Receiver and IC thereof capable of receiving analog broadcast and digital broadcast Nov. 2, 2004
6803814 Demodulator and method for the demodulation of modulated RF signals Oct. 12, 2004
6724246 Demodulation structure and method Apr. 20, 2004
6717462 QPSK and 16 QAM self-generating synchronous direct downconversion demodulator Apr. 6, 2004
6704562 N-port receiver with RF/LO isolation Mar. 9, 2004
6654424 Method and device for tuning a first oscillator with a second oscillator and rotation rate sensor Nov. 25, 2003
6650178 N-port direct receiver Nov. 18, 2003
6650715 Apparatus for recovering decision-directed carrier Nov. 18, 2003
6628736 Estimating the optimal sampling instant in a TDMA packet transmission system Sep. 30, 2003
6624691 Demodulator for processing digital signal Sep. 23, 2003
6621332 Demodulator and demodulation method of DQPSK system with reduced circuit scale Sep. 16, 2003
6597900 Circuit arrangement providing impedance translation filtering Jul. 22, 2003
6580314 Demodulation system and method for recovering a signal of interest from a modulated carrier sampled at two times the phase generated carrier frequency Jun. 17, 2003
6570441 Incoherent demodulator and method of incoherently demodulating an IF signal May. 27, 2003
6545532 Timing recovery circuit in a QAM demodulator Apr. 8, 2003
6512799 Digital communication system and method for increased bit rates Jan. 28, 2003
6507625 Digital modulator and digital demodulator Jan. 14, 2003
6459741 Implementation of N-VSB training sequences in N-squared QAM receiver structures Oct. 1, 2002
6441683 Device and method for recovering frequency redundant data in a network communications receiver Aug. 27, 2002
6433630 Phase shifter, and demodulator employing it Aug. 13, 2002
6415004 Phase detector, timing recovery device using the same, and a demodulator using the timing recovery device Jul. 2, 2002
6400233 Method and apparatus for compensating for distortion in IQ modulators Jun. 4, 2002
6341146 Phase-shift-keying demodulator and demodulation method using a period-width windowing technique Jan. 22, 2002
6330290 Digital I/Q imbalance compensation Dec. 11, 2001
6310513 Demodulator and demodulation method for demodulating quadrature modulation signals Oct. 30, 2001
6294952 Quadrature demodulator quadrature demodulation method and recording medium Sep. 25, 2001

1 2 3 4 5


 
 
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