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A novel CMOS demodulation detector for time-offlight applications is presented. It can handle large amounts of background light by removing the resulting common-mode signal at the detector level. A common-mode feedback circuit is used on top of a current-assisted photonic demodulator (CAPD) to remove the incoming light that is not correlated to the modulation signal. A dynamic element matching (DEM)...
A current-assisted photonic sampler (CAPS) is presented, building on the principles of the current-assisted photonic demodulator (CAPD), but modified for high-speed gating applications such as time-resolved fluorescence-lifetime microscopy. This detector uses an internally applied electric field to move photo-generated electrons by fast drift to selected detection junctions to achieve nanosecond lifetime...
A Delay-Locked Loop (DLL) is presented that can track the phase of a continuous-wave modulated light signal. Using it in a time-of-flight set-up allows tracking of an object's distance in a fast and reliable way. The CMOS detector is built around a current-assisted photonic demodulator (CAPD) with an additional common-mode feedback (CMFB) avoiding detector saturation. The DLL control loop is implemented...
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