Resources Contact Us Home
Browse by Category: Main > Communications
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 191

Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8639206 Method and apparatus for quadrature mixer circuits Jan. 28, 2014
8576963 Non-coherent detection apparatus and method for IEEE 802.15.4 LR-WPAN BPSK receiver Nov. 5, 2013
8520780 Communication units, communication system and methods for modulation and demodulation Aug. 27, 2013
8509361 Simplified acquisition apparatus and method for a Bluetooth receiver Aug. 13, 2013
8462894 Receiver circuit and receiver apparatus including the same Jun. 11, 2013
8442132 Method and apparatus for allocating processing delays in multi-carrier systems May. 14, 2013
8391349 Equalizer with automatic gain control (AGC) Mar. 5, 2013
8324963 Demodulation circuit Dec. 4, 2012
8265192 Multilevel QAM demodulator, multilevel QAM demodulation method, and wireless communication system Sep. 11, 2012
8174310 Quadrature modulation demodulation circuit May. 8, 2012
8085088 Quadrature signal demodulator circuitry suitable for doppler ultrasound Dec. 27, 2011
8064542 Systems and methods for I/Q imbalance correction and calibration of variable modulus signals Nov. 22, 2011
7953184 Direct sampling type wireless receiver and method using the same May. 31, 2011
7898322 Demodulator for a low power radio receiver Mar. 1, 2011
7881405 Combined mixer and polyphase decimator Feb. 1, 2011
7835457 Demodulating a signal having multiple frequency bands Nov. 16, 2010
7826565 Blocker performance in a radio receiver Nov. 2, 2010
7796710 Digital signal demodulator and wireless receiver using the same Sep. 14, 2010
7792223 Method and system for demodulating data signals Sep. 7, 2010
7778354 Communicating apparatus, method of calculating set value of orthogonal error compensation and orthogonal error compensation program Aug. 17, 2010
7728657 PLL circuit, phase shifting method, and IC chip Jun. 1, 2010
7702040 Method and apparatus for frequency discriminator and data demodulation in frequency lock loop of digital code division multiple access (CDMA) receivers Apr. 20, 2010
7697637 Demodulation circuit and demodulating method Apr. 13, 2010
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

1 2 3 4 5

  Recently Added Patents
Method and system for checking citations
Method and system for scaling usage of a social based application on an online social network
Fringe field switching mode liquid crystal display panel
Endotracheal tube
Method for transitioning between Ziegler-Natta and metallocene catalysts in a bulk loop reactor for the production of polypropylene
Direct connect single layer touch panel
Managing aging of silicon in an integrated circuit device
  Randomly Featured Patents
Cabled signaling system and components thereof
Wide tire tread
Molded container with anti-glug vent tube and pinched handle
Current protection apparatus and method
Low pressure reactive magnetron sputtering apparatus and method
Tile removing tool
X-ray collimator for imaging with multiple sources and detectors
Tamper evident bottle or package closure
Sensor device for spacial imaging of endoscopes
Molding method for thermosetting resin based, rubber vulcanization type, fiber reinforced composite material, and thermosetting resin, based, rubber vulcanization type, fiber reinforced compos