Correlated readout - A new readout method of focal plane array

Document Type

Conference Proceeding

Publication Date

12-1-1998

Abstract

A new readout method of focal plane array - correlated readout is presented for the first time. The interface circuit of this method is modeled as to charge and discharge the integration capacitor according to a control signal. Combined with an optical modulator, this readout method will be able to increase image's dynamic range and signal-to-noise ratio more effectively for strong background application. It will not only increase the output voltage swing but also attenuate noises that have lower frequency than the modulation frequency. Several interface circuits are designed and studied. SPICE simulation results show that correlated capacitive transimpedance amplifier (CTIA) may become a very promising correlated readout circuit. In order to study this new method experimentally by visible imager, a 16×16 silicon CMOS FPA demo chip has been designed, along with a test system. The application of this method on solar megnetograph measurement is discussed.

Identifier

0032403398 (Scopus)

Publication Title

Proceedings of SPIE the International Society for Optical Engineering

External Full Text Location

https://doi.org/10.1117/12.321762

ISSN

0277786X

First Page

52

Last Page

59

Volume

3360

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