A 533pW NEP 31×31 pixel THz image sensor based on in-pixel demodulation

A THz 31×31 pixel, 100 fps image sensor integrated in a 130 nm CMOS process is presented. Taking advantage of the possibility to modulate the active source that lights the scene, a significant improvement in sensitivity and NEP is achieved by shifting the modulated THz radiation, by means of an antenna/MOSFET, then filtering the signal band using an in-pixel 16-paths passive SC-filter combined with a CT Gm-C filter resulting in a high Q factor of 100. This THz imager features a measured NEP of 533 pW at 270 GHz and 732 pW at 600 GHz respectively, and a sensitive readout chain with an input referred noise of 0.2 μVRMS.

Published in:
Porceeding s of the European Solid State Circuits Conference (ESSCIRC), 303-306
Presented at:
European Solid State Circuits Conference (ESSCIRC), ESSCIRC 2014 - 40th, Venice Lido, Italy, 22-26 Sept. 2014

 Record created 2016-02-13, last modified 2018-09-13

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