Resumes & CV records
Resumes
Software Engineer
Work:
Infosys
Software Engineer
Software Engineer
Education:
University of Washington
Zheng Feng YangKahului, HI
Zheng Yang Phones & Addresses
Kahului, HI
Lihue, HI
Honolulu, HI
Wilmington, DE
100 Silver Lake Rd, Middletown, DE 19709 302-3763571
Mentions for Zheng Feng Yang
Publications & IP owners
Us Patents
Current/Voltage Mode Image Sensor With Switchless Active Pixels
US Patent:
7924332, Apr 12, 2011
Filed:
May 25, 2007
Appl. No.:
11/754048
Inventors:
Viktor Gruev - Philadelphia PA, US
Zheng Yang - Philadelphia PA, US
Jan van der Spiegel - Philadelphia PA, US
Zheng Yang - Philadelphia PA, US
Jan van der Spiegel - Philadelphia PA, US
Assignee:
The Trustees Of The University Of Pennsylvania - Philadelphia PA
International Classification:
H04N 3/14
H04N 9/64
H01L 27/00
H04N 9/64
H01L 27/00
US Classification:
348308, 348248, 348310, 2502081
Abstract:
A voltage and current mode active pixel sensor for high resolution imaging is presented. The photo pixel is composed of a photodiode and two transistors: reset and transconductance amplifier transistor. The switch transistor is moved outside the pixel, allowing for lower pixel pitch and increased linearity of the output photocurrent. The reset and amplifier (readout) transistors may also be shared among adjacent pixels by the introduction of transfer switches between the photodiodes and the source of the reset transistor and the gate of the readout transistor. The switch transistor outside the pixels provides biasing voltages or currents to the readout transistors to selectively turn them on when readout of the corresponding photodiode is desired and turns the readout transistor off when the corresponding photodiode is not to be read out. The increased linearity of the image sensor has greatly reduced spatial variations across the image after correlated double sampling and the column fix pattern noise is greatly improved.
Cmos Linear Voltage/Current Dual-Mode Imager
US Patent:
8471189, Jun 25, 2013
Filed:
May 18, 2007
Appl. No.:
12/301400
Inventors:
Jan Van der Spiegel - Philadelphia PA, US
Viktor Gruev - Philadelphia PA, US
Zheng Yang - Philadelphia PA, US
Viktor Gruev - Philadelphia PA, US
Zheng Yang - Philadelphia PA, US
Assignee:
The Trustees Of The University Of Pennsylvania - Philadelphia PA
International Classification:
H01L 27/00
H01L 31/00
H01J 40/14
H01L 31/00
H01J 40/14
US Classification:
2502081, 250214 R, 2502141, 348308
Abstract:
A CMOS image sensor that is capable of both voltage- and current-mode operations selects the mode based on the position of mode switches. Each pixel on the imager has a single transistor acting as either source follower for voltage readout, or transconductor for current readout. The two modes share the same readout lines, but have their own correlated double sampling (CDS) units for noise suppression. A current-mode readout technique using a velocity-saturated short-channel transistor may be used to achieve high linearity. An image array may be formed as a mixture of 3 types of pixels with identical photodiodes and access switches. The readout transistors are optimally sized for their designated mode of operation. Alternatively, two readout transistors are provided per pixel, each individually optimized for the desired mode of operation.
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