16 May 2001 Speeding up CMOS cameras and optical receivers by improved column multiplexer
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Proceedings Volume 4290, Optoelectronic Integrated Circuits and Packaging V; (2001) https://doi.org/10.1117/12.426916
Event: Symposium on Integrated Optics, 2001, San Jose, CA, United States
Abstract
A new method to compensate for the column multiplexer (MUS) in photo detector arrays is described and analyzed. It is based on a transimpedance amplifier with improved feedback structure. The focus is on arrays where the photo current is directly used as signal. If this current is transferred to the global transimpedance amplifier by a multiplexer, the resistance of te MUX transistor causes a significant speed degradation. Measurements of a test chip in 0.19micrometers CMOS are presented. It turns out that using the proposed circuit it is possible to almost fully compensate for the MUX in terms of speed and signal amplitude with only little layout area penalty.
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Bernhard Wicht, Ingo Martiny, Doris Schmitt-Landsiedel, Steffen Paul, Anthony Sanders, "Speeding up CMOS cameras and optical receivers by improved column multiplexer", Proc. SPIE 4290, Optoelectronic Integrated Circuits and Packaging V, (16 May 2001); doi: 10.1117/12.426916; https://doi.org/10.1117/12.426916
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