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Time of flight distance sensor with enhanced dynamic range This publication appears in: International Journal of Intelligent Systems Technologies and Applications Authors: D. Van Nieuwenhove, W. van der Tempel, R. Grootjans and M. Kuijk Volume: 5 Pages: 246-254 Publication Date: Sep. 2008
Abstract: A Time-Of-Flight distance measurement sensor is presented.
Detection and mixing is done with an in-substrate Current Assisted Photonic
Demodulator. Background light suppression and high dynamic range is
achieved using a Variable Transimpedance Amplifier. The pixel also comprises
sample and hold circuitry and special low pass filters, for in-pixel averaging,
with a 10 Hz to 10 kHz tuneable cut-off frequency. Proof-of-principle
measurements on a standard Complementary Metal Oxide Semiconductor
0.35 um prototype measuring 50 um � 50 um with a fill factor of 60% are
included.
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