Correlated readout: a new readout method of focal plane array

Details Correlated readout: a new readout method of focal plane array Correlated readout: a new readout method of focal plane array

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3360...52q&link_type=abstract

Proc. SPIE Vol. 3360, p. 52-59, Infrared Readout Electronics IV, Bedabrata Pain; Terrence S. Lomheim; Eds.

Physics

Scientific paper

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.

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