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A low noise readout detector circuit for nanoampere sensor applications

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2 Author(s)
Thelen, D.C., Jr. ; Microelectron. Res. Center, New Mexico Univ., Albuquerque, NM, USA ; Chu, D.D.

A readout detector IC has been developed which is capable of detecting nanoampere photo-current signals of interest in a high (microampere) background illumination or dc noise level (SNR=80 dB). The readout detector sensor IC processes transient signals of interest from a separate photo-diode pixel array chip. Low noise signal conditioning, filtering, and signal thresholding implement smart sensor detection of only “active pixels.” This detector circuit can also be used to perform signal conditioning for other sensor applications that require detection of very small signals in a high background noise environment

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:32 ,  Issue: 3 )

Date of Publication:

Mar 1997

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