1
Yanbin Yu, Zhongxuan Zhang: Digital cameras using multiple sensors with multiple lenses. Joe Zheng, August 26, 2003: US06611289 (183 worldwide citation)

An improved digital camera that produces digital images of high qualities without using expensive image sensors and optics is disclosed. The disclosed digital cameras use multiple image sensors with multiple lenses. One of the multiple image sensors is made to be responsive to all intensity informat ...


2
Zhimin Zhou, Zhongxuan Zhang, Li yen Shih, Wei Li: Column readout multiplexer for CMOS image sensors with multiple readout and fixed pattern noise cancellation. PixArt Technology, Claude Hamrick, Oppenheimer W Donnelly, Justin Boyce, October 12, 1999: US05965871 (138 worldwide citation)

An active pixel sensing structure includes an array of pixel unit cells each of which an adapted to alternate between a light sensing mode wherein the cell outputs an image signal and a reset mode wherein the cell outputs a reset signal. The image signal is proportional to light incident on the cell ...


3
Zhongxuan Zhang, He Du: Voltage controlled oscillator including voltage controlled delay circuit with power supply noise isolation. Cirrus Logic, Majestic Parsons Siebert & Hsue, September 24, 1996: US05559476 (46 worldwide citation)

A VCO includes a ring oscillator formed by connecting a plurality of voltage controlled inverting delay cells together, and a plurality of transistors for providing control voltages to the plurality of voltage controlled inverting delay cells. Preferably, each transistor has a drain connected to a r ...


4
Behrooz Rezvani, John Zhongxuan Zhang, Dale Smith, Caesar Seehoi Wong: Method and apparatus for multi-channel X-DSL line driver. Ikanos Communications, Charles C Cary, Cary & Kelly, October 15, 2002: US06466088 (31 worldwide citation)

An apparatus and method for reducing power requirements in X-DSL and other communication protocols is disclosed. The apparatus may be applied with equal advantage in wired and wireless media Power is supplied selectively to input lines in which input signals exceed selected threshold levels. The app ...


5
John Zhongxuan Zhang, Peter Gunadisastra, Dale Smith, Mong Yang, Ali Al Shamma: Method and apparatus for digital to analog conversion with distortion calibration. IKANOS Communication, Charles C Cary, IP Creators, December 31, 2002: US06501405 (8 worldwide citation)

An apparatus and method is disclosed for minimizing in band distortion in the transmit path of an XDSL modem. The transmit path of an XDSL modem introduces various non-linearities into transmissions in both the frequency and time domains. The current invention provides a means for both determining a ...


6
Lixin Zhao, Zhongxuan Zhang: Digital to analog converter with integral intersymbol interference cancellation. UTStarcom, Felix L Fischer, May 24, 2005: US06897797 (5 worldwide citation)

A digital to analog converter (DAC) for a communications system with reduced intersymbol interference incorporates dynamic element matching (DEM) with a matching element array having 2M bits for an input corresponding to M+1 levels thereby employing only one half the range of the DEM and array to pr ...


7
Behrooz Rezvani, Sam Heidari, John Zhongxuan Zhang, Dale Smith: Method and apparatus for pre-distortion of an X-DSL line driver. Ikanos Communication, IP Creators, Charles C Cary, March 29, 2005: US06873653 (5 worldwide citation)

An apparatus and method is provided for minimizing in channel distortion in an X-DSL line driver is disclosed. The apparatus may be incorporated in an existing X-DSL architecture without additional circuitry. Out of band monitoring of a channel is implemented to adaptively minimize out of band inter ...


8
Zhongxuan Zhang, Bernard Ginetti: Parallel multibit digital-to-digital sigma-delta modulation. MStar Semiconductor, Edell Shapiro & Finnan, September 30, 2014: US08847803

Digital input words are received in parallel by a parallel digital-to-digital sigma-delta modulator. Error words corresponding to quantization error are added in parallel to the input words to form encoded data words. The encoded data words are quantized into parallel output words and the error word ...


9
Zhongxuan Zhang, Lixin Zhao, Steve Xuefeng Jiang: Limiter based analog demodulator. Marvell World Trade, October 12, 2010: US07813452

A phase detector includes a decimator to decimate a digitized in-phase signal and a digitized quadrature signal to N times a symbol rate, where N is an integer greater than one. A burst detector to detect bursts in an output of the decimator. A carrier offset block to determine an offset angle based ...


10
John Zhongxuan Zhang, Chih Cheng Ku: Wireless transmission method and associated system. MStar Semiconductor, Edell Shapiro & Finnan, May 26, 2015: US09042831

A method of wireless transmission applicable to transmission between a first communication terminal and a second transmission terminal is provided. The first communication terminal transmits data via a first channel selected as a primary transmission channel. The transmission quality of the primary ...



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