TY - GEN
T1 - Current-mode image sensor with 1.5 transistors per pixel and improved dynamic range
AU - Yang, Zheng
AU - Gruev, Viktor
AU - Van Der Spiegel, Jan
PY - 2008
Y1 - 2008
N2 - This paper describes a current-mode active pixel sensor (APS) for low supply voltage, low noise and high resolution/ high speed imaging applications. The imager is designed in a standard 0.25μm 2.5V CMOS process. A transistor count of 1.5 per pixel is achieved through transistor sharing and floating diffusion (FD) based addressing. Highly linear current readout in velocity saturation, as well as triple sampling (TS), are used to reduce fixed pattern noise (FPN). Dynamic range (DR) is improved through FD presetting and boosting techniques, which allow the full-well capacity of photodiodes to be utilized without degrading readout linearity. Post-extraction simulation results on FPN and DR are presented, and compared favorably to a conventional 3-transistor pixel design.
AB - This paper describes a current-mode active pixel sensor (APS) for low supply voltage, low noise and high resolution/ high speed imaging applications. The imager is designed in a standard 0.25μm 2.5V CMOS process. A transistor count of 1.5 per pixel is achieved through transistor sharing and floating diffusion (FD) based addressing. Highly linear current readout in velocity saturation, as well as triple sampling (TS), are used to reduce fixed pattern noise (FPN). Dynamic range (DR) is improved through FD presetting and boosting techniques, which allow the full-well capacity of photodiodes to be utilized without degrading readout linearity. Post-extraction simulation results on FPN and DR are presented, and compared favorably to a conventional 3-transistor pixel design.
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U2 - 10.1109/ISCAS.2008.4541801
DO - 10.1109/ISCAS.2008.4541801
M3 - Conference contribution
AN - SCOPUS:51749092838
SN - 9781424416844
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
SP - 1850
EP - 1853
BT - 2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008
T2 - 2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008
Y2 - 18 May 2008 through 21 May 2008
ER -