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Proceedings Paper

Correlated readout: a new readout method of focal plane array
Author(s): Changqing Qiu; Xinde Wang; Ken K. Chin
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Paper Abstract

A new readout method of coal pane 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 may become a very promising correlated readout circuit. In order to study this new method experimentally by visible imager, a 16 by 16 silicon CMOS FPA demo chip has been designed, along with a test system. The application of this method on solar megnetrograph measurement is discussed.

Paper Details

Date Published: 14 September 1998
PDF: 8 pages
Proc. SPIE 3360, Infrared Readout Electronics IV, (14 September 1998); doi: 10.1117/12.321762
Show Author Affiliations
Changqing Qiu, New Jersey Institute of Technology (United States)
Xinde Wang, New Jersey Institute of Technology (United States)
Ken K. Chin, New Jersey Institute of Technology (United States)

Published in SPIE Proceedings Vol. 3360:
Infrared Readout Electronics IV
Bedabrata Pain; Terrence S. Lomheim, Editor(s)

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