ClassID:

218978

H03D3/009 - CPC Classification

Classification description:

Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals Compensating quadrature phase or amplitude imbalances

Recent Application in this class:
#1
20250327665
2025-10-23

PRECISION RATE DEMODULATION FOR A VIBRATING GYROSCOPE

#2
20250007463
2025-01-02

CIRCUIT AND METHOD TO DETECT FAULTS OF A MEMS DEVICE INCLUDING AN OSCILLATING MASS

#3
20230378982
2023-11-23

Local oscillator leakage reporting

#4
20220337192
2022-10-20

Passive mixer, operating method thereof, and devices including the same

#5
20220200838
2022-06-23

Method and apparatus for in-phase and quadrature imbalance correction in a frequency domain

#6
20220007318
2022-01-06

System and method for IQ mismatch calibration and compensation

#7
20210359657
2021-11-18

Automatic gain control circuit, corresponding receiver, transmitter and method

#8
20210033399
2021-02-04

Signal processing

#9
20200313620
2020-10-01

Apparatus, system, and method of distributing a reset signal to a plurality of PHY chains

#10
20200304169
2020-09-24

Methods, systems, and articles of manufacture for joint decoding of packets in wireless networks using chirp spread-spectrum modulation

#11
20200153675
2020-05-14

IQ mismatch correction module

#12
20200076671
2020-03-05

Quadrature radio receiver with gain-dependent mismatch correction

#13
20200059386
2020-02-20

Synchronizing a digital frequency shift

#14
20190391193
2019-12-26

An interferometric IQ-mixer/DAC solution for active, high speed vector network analyser impedance renormalization

#15
20190386869
2019-12-19

METHOD AND APPARATUS FOR CALIBRATING MISMATCHING BETWEEN IN-PHASE COMPONENT AND QUADRATURE COMPONENT IN WIRELESS COMMUNICATION SYSTEM

#16
20190380101
2019-12-12

System and method for IQ mismatch calibration and compensation

#17
20190372823
2019-12-05

CIRCUITS AND SYSTEMS FOR WIDEBAND QUADRATURE SIGNAL GENERATION

#18
20190361113
2019-11-28

Combined radar and communications system using common signal waveform

#19
20190312610
2019-10-10

Methods, systems, and articles of manufacture for joint decoding of packets in wireless networks using chirp spread-spectrum modulation

#20
20190190451
2019-06-20

Methods, circuits, and apparatus for calibrating an in-phase and quadrature imbalance

#21
20190132183
2019-05-02

Estimation apparatus for IQ imbalance of optical transmitter, compensation apparatus for IQ imbalance of optical transmitter and electronic equipment

#22
20190107601
2019-04-11

Dynamic IQ mismatch correction in FMCW radar

#23
20190089306
2019-03-21

Flow detection with quadrature demodulation

#24
20190020426
2019-01-17

Apparatus and method of detection of image interference in a radio frequency receiver

#25
20190020310
2019-01-17

Apparatus and method of reducing power consumption in a low intermediate frequency radio receiver

#26
20190007076
2019-01-03

Method and apparatus to detect lo leakage and image rejection using a single transistor

#27
20180375711
2018-12-27

Circuits and systems for wideband quadrature signal generation

#28
20180198573
2018-07-12

Systems and methods for asynchronous re-modulation with adaptive I/Q adjustment

#29
20170170915
2017-06-15

Apparatus for reducing an amplitude imbalance and a phase imbalance between an in-phase signal and a quadrature signal

#30
20160380788
2016-12-29

Systems and methods to dynamically calibrate and adjust gains in a direct conversion receiver

#31
20160269208
2016-09-15

Module for a radio receiver

#32
20160248617
2016-08-25

Distortion compensation circuit

#33
20160126894
2016-05-05

Phase shifting mixer

#34
20160126893
2016-05-05

Quadrature mixer arrangement

#35
20160094379
2016-03-31

System for the correction of amplitude and phase errors of in-quadrature signals, corresponding receiver and method

#36
20160056764
2016-02-25

Method and apparatus to detect LO leakage and image rejection using a single transistor

#37
20150288549
2015-10-08

Systems and methods for narrowband signal quadrature error correction

#38
20150271005
2015-09-24

Phase imbalance calibration

#39
20150229497
2015-08-13

Loopback technique for IQ imbalance estimation for calibration in OFDM systems

#40
20150215084
2015-07-30

Systems and methods for asynchronous re-modulation with adaptive I/Q adjustment

#41
20150200628
2015-07-16

Coefficient estimation for digital IQ calibration

#42
20150195050
2015-07-09

I/Q mismatch compensation method and apparatus

#43
20150180415
2015-06-25

Systems and methods for I-Q imbalance calibration

#44
20150172082
2015-06-18

IQ mismatch compensation

#45
20150065074
2015-03-05

Simplified high frequency tuner and tuning method

#46
20150023456
2015-01-22

Systems and methods for asynchronous re-modulation with adaptive I/Q adjustment

#47
20140306773
2014-10-16

Self-oscillation circuit having means for eliminating quadrature error and method for eliminating quadrature error using the circuit

#48
20140273828
2014-09-18

Apparatus and method for reducing phase noise in near field communication device signaling

#49
20140270018
2014-09-18

Circuit architecture for I/Q mismatch mitigation in direct conversion receivers

#50
20140204986
2014-07-24

Apparatus and method for correcting IQ imbalance

#51
20140179245
2014-06-26

Adjusting phase imbalance between in-phase (I) and quadrature-phase (Q) signals

#52
20140128016
2014-05-08

Systems and methods for asynchronous re-modulation with adaptive I/Q adjustment

#53
20140098913
2014-04-10

System and method for I-Q imbalance correction

#54
20140030996
2014-01-30

Linearity in passive mixer circuits

#55
20140029700
2014-01-30

Multi-tap IQ imbalance estimation and correction circuit and method

#56
20130251073
2013-09-26

Simplified high frequency tuner and tuning method

#57
20130243131
2013-09-19

Real-time I/Q imbalance correction for wide-band RF receiver

#58
20130216004
2013-08-22

Receiver having inphase-quadrature imbalance compensation and inphase-quadrature imbalance compensation method thereof

#59
20130148224
2013-06-13

Implementing spin-torque oscillator sensing with enhanced integrated demodulator for hard disk drives

#60
20130122847
2013-05-16

Harmonic reject receiver architecture and mixer

#61
20130121388
2013-05-16

Low complexity frequency selective IQ mismatch digital RX balancer and TX inverse balancer for non-ideal RF front-end

#62
20130069738
2013-03-21

Imbalance compensator for correcting mismatch between in-phase branch and quadrature branch, and related imbalance compensation method and direct conversion receiving apparatus thereof

#63
20120319774
2012-12-20

Multi-stage gain control in receivers and other circuits

#64
20120314811
2012-12-13

Apparatus and method for a wideband RF mixer

#65
20120302193
2012-11-29

Harmonic reject receiver architecture and mixer

#66
20120302192
2012-11-29

Harmonic reject receiver architecture and mixer

#67
20120300887
2012-11-29

Harmonic reject receiver architecture and mixer

#68
20120270516
2012-10-25

Receiver for estimating and compensating for in-phase/quadrature mismatch

#69
20120183106
2012-07-19

Circuit, controller and methods for dynamic estimation and cancellation of phase and gain imbalances in quardrature signal paths of a receiver

#70
20120178392
2012-07-12

Apparatus and method for adaptive I/Q imbalance compensation

#71
20120106686
2012-05-03

Digital I/Q imbalance compensation in a quadrature receiver

#72
20120093244
2012-04-19

Apparatus and methods for compensating for signal imbalance in a receiver

#73
20120028594
2012-02-02

Method and apparatus for imbalance-free FM demodulation in direct conversion radio receivers

#74
20110312292
2011-12-22

Method and system for measuring receiver mixer IQ mismatch

#75
20110293046
2011-12-01

Complex signal processing circuit, receiver circuit, and signal reproduction device

#76
20110292978
2011-12-01

Calibration of quadrature imbalances using wideband signals

#77
20110207418
2011-08-25

Methods and apparatus for measuring and/or using transmitter and/or receiver IQ imbalance information and/or DC offset information

#78
20110188607
2011-08-04

Simplified high frequency tuner and tuning method

#79
20110182388
2011-07-28

Apparatus for rejecting image in receiver

#80
20110182335
2011-07-28

Calibration signal generator

#81
20110158297
2011-06-30

Joint transmit and receive I/Q imbalance compensation

#82
20110134334
2011-06-09

Systems and methods providing spur avoidance in a direct conversion tuner architecture

#83
20110081877
2011-04-07

Dual conversion receiver with programmable intermediate frequency and channel selection

#84
20110009080
2011-01-13

Receiver architecture with digitally generated intermediate frequency

#85
20100296502
2010-11-25

I-Q mismatch compensation

#86
20100266067
2010-10-21

Compensator unit and compensation method for I/Q imbalance errors

#87
20100232490
2010-09-16

Estimating and filtering multiple sets of MIPS from different frequencies

#88
20100197252
2010-08-05

FM-AM demodulator and control method therefor

#89
20100184394
2010-07-22

Simplified high frequency tuner and tuning method

#90
20100167674
2010-07-01

Integrated circuit, wireless communication unit and method for determining quadrature imbalance

#91
20100104045
2010-04-29

IQ mismatch correction circuit

#92
20100067622
2010-03-18

Circuit, controller and methods for dynamic estimation and cancellation of phase and gain imbalances in quadrature signal paths of a receiver

#93
20100056090
2010-03-04

Simplified high frequency tuner and tuning method

#94
20100056088
2010-03-04

Simplified high frequency tuner and tuning method

#95
20100056087
2010-03-04

Simplified high frequency tuner and tuning method

#96
20100056086
2010-03-04

Simplified high frequency tuner and tuning method

#97
20100045404
2010-02-25

Phase error cancellation for differential signals

#98
20100015936
2010-01-21

Method and system for correcting receiver mixer IQ mismatch

#99
20100008449
2010-01-14

Frequency dependent I/Q imbalance estimation

#100
20100003943
2010-01-07

Harmonic reject receiver architecture and mixer

#101
20090302925
2009-12-10

Orthogonal signal output circuit

#102
20090291649
2009-11-26

In-phase and quadrature-phase signal amplitude and phase calibration

#103
20090268101
2009-10-29

Direct conversion television receiver

#104
20090253394
2009-10-08

Simplified high frequency tuner and tuning method

#105
20090154595
2009-06-18

I-Q mismatch calibration and method

#106
20090147886
2009-06-11

Adaptive IQ alignment apparatus

#107
20090129508
2009-05-21

Quadrature alignment in communications receivers

#108
20090116586
2009-05-07

Direct conversion receiver and method for correcting phase imbalance therein

#109
20090103655
2009-04-23

Simplified de-rotation in digital FM demodulator architectures

#110
20090086850
2009-04-02

Method and system for a receiver with undersampling mixing using multiple clock phases

#111
20090079497
2009-03-26

PHASE TUNING TECHNIQUES

#112
20090040393
2009-02-12

Quadrature correction method for analog television reception using direct-conversion tuners

#113
20090036079
2009-02-05

IQ imbalance image suppression in presence of unknown phase shift

#114
20080318538
2008-12-25

Simplified high frequency tuner and tuning method

#115
20080318536
2008-12-25

Simplified high frequency tuner and tuning method

#116
20080267336
2008-10-30

Synchronizing circuit and controlling method thereof

#117
20080232498
2008-09-25

Radio receiver or transmitter and method for reducing an IQ gain imbalance

#118
20080212711
2008-09-04

IQ-Imbalance

#119
20080212662
2008-09-04

Apparatus for measuring in-phase and quadrature (IQ) imbalance

#120
20080170651
2008-07-17

Correction of mismatches between two I and Q channels

#121
20080151977
2008-06-26

Method and apparatus for compensating for mismatch occurring in radio frequency quadrature transceiver using direct-conversion scheme

#122
20080137785
2008-06-12

Method and system for RC-CR quadrature generation with wideband coverage and process compensation

#123
20080130779
2008-06-05

Apparatus and methods for compensating for signal imbalance in a receiver

#124
20080123785
2008-05-29

Methods and apparatus for simultaneous automatic gain, phase and DC offset correction in communication receivers

#125
20080075198
2008-03-27

Method for I/Q signal adjustment

#126
20080037688
2008-02-14

Method and circuit for carrier control in a quadrature demodulator

#127
20080037684
2008-02-14

Communication system for utilizing single tone testing signal having specific frequency or combinations of DC value and single tone testing signal to calibrate impairments in transmitting signal

#128
20080008269
2008-01-10

Method for compensation for any phase and/or amplitude error in a receiver

#129
20070297532
2007-12-27

Reducing image spectral leakage due to I-Q imbalance

#130
20070291883
2007-12-20

Method and apparatus for I/Q imbalance compensation

#131
20070281647
2007-12-06

Receiver for use in wireless communications and method of operation of the receiver

#132
20070257737
2007-11-08

Device for ultra wide band frequency generating

#133
20070127599
2007-06-07

Apparatus and method for phase recovery and I/Q imbalance compensation in quadrature demodulating receiver

#134
20070123188
2007-05-31

Method and system for measuring receiver mixer IQ mismatch

#135
20070116149
2007-05-24

Memoryless spectrum correction algorithm for non-ideal I/Q demodulators

#136
20070080835
2007-04-12

Method and system for calibrating frequencies-amplitude and phase mismatch in a receiver

#137
20070058754
2007-03-15

Apparatus and method for calibrating IQ mismatch

#138
20070058702
2007-03-15

Method and device for estimating IQ imbalance

#139
20070046529
2007-03-01

Signal adder circuit capable of removing effects due to phase error or amplitude error of I and Q signals

#140
20070042744
2007-02-22

Quadrature frequency changer, tuner and modulator

#141
20070036240
2007-02-15

Quadrature alignment in communications receivers

#142
20070019113
2007-01-25

Mixer system with amplitude-, common mode- and phase corrections

#143
20070015482
2007-01-18

Selective channel tuner and tuning method

#144
20060291590
2006-12-28

Quadrature receiver with correction engine, coefficient controller and adaptation engine

#145
20060281432
2006-12-14

Radio frequency tuner

#146
20060281411
2006-12-14

Method of reducing imbalance in a quadrature frequency converter, method of measuring imbalance in such a converter, and apparatus for performing such method

#147
20060252399
2006-11-09

Apparatus and method for digital image correction in a receiver

#148
20060203901
2006-09-14

Apparatus and method for correcting IQ imbalance

#149
20060198475
2006-09-07

Apparatus and method for compensating IQ imbalance in OFDM system with carrier frequency offset

#150
20060160518
2006-07-20

Harmonic reject receiver architecture and mixer

#151
20060153318
2006-07-13

Memoryless spectrum correction algorithm for non-ideal I/Q demodulators

#152
20060146691
2006-07-06

Amplitude controller

#153
20060133548
2006-06-22

Apparatus and method to calibrate amplitude and phase imbalance for communication receivers

#154
20060083335
2006-04-20

Receiver architecture with digitally generated intermediate frequency

#155
20060034356
2006-02-16

Transmission/reception arrangement and method for reducing nonlinearities in output signals from a transmission/reception arrangement

#156
20060023826
2006-02-02

Carrier phase detector

#157
20060023813
2006-02-02

Apparatus and method for integration of tuner functions in a digital receiver

#158
20060019624
2006-01-26

Simplified high frequency tuner and tuning method

#159
20050281356
2005-12-22

Quadrature voltage controlled oscillator with automated phase control

#160
20050248478
2005-11-10

Method and apparatus for DC offset removal

#161
20050239428
2005-10-27

Dual conversion receiver with programmable intermediate frequency and channel selection

#162
20050226352
2005-10-13

Mirror suppression circuit and receiver using such circuit

#163
20050220220
2005-10-06

Slicing algorithm for multi-level modulation equalizing schemes

#164
20050157815
2005-07-21

Apparatus for compensating DC offsets, gain and phase imbalances between I-channel and Q-channel in quadrature transceiving system

#165
20050152481
2005-07-14

METHOD AND APPARATUS OF IQ MISMATCH CALIBRATION

#166
20050152476
2005-07-14

Direct conversion receiver and receiving method

#167
20050135521
2005-06-23

Method and apparatus for compensating I/Q imbalance in receivers

#168
20050123067
2005-06-09

Apparatus and method for detecting I/Q channel imbalance in direct conversion digital quadrature transmission system

#169
20050105648
2005-05-19

Coherent adaptive calibration system and method

#170
20050075815
2005-04-07

On-signal quadrature modulator calibration

#171
20050070239
2005-03-31

Apparatus and method for digital image correction in a receiver

#172
20050013388
2005-01-20

Compensation of the IQ phase asymmetry in quadrature modulation and demodulation methods

#173
16596576
2020-12-08

Systems and methods for digital correction with selective enabling in low intermediate frequency (IF) receivers

#174
16435633
2020-03-24

Quadrature signal imbalance estimation

#175
15848002
2018-09-04

I/Q imbalance calibration apparatus, method and transmitter system using the same