Patent ID: 6885002
Filing Date: 2005-04-26
Classification: H01L,H04N

Abstract:
1. A unit cell of a readout integrated circuit operable during a frame period, comprising: a detector node for coupling to a radiation detector that is operable in at least two radiation wavelength bands; a first circuit coupled to said detector node for setting a bias potential at said detector node as a function of a selected radiation band to be detected; a second circuit coupled between said detector node and an integration capacitance for selectively coupling said integration capacitance to said detector node as a function of the selected radiation band to be detected for sourcing current towards said detector node or for sourcing current from said detector node; a third circuit coupled to said integration capacitance for periodically resetting said integration capacitance; and a plurality of averaging capacitances switchably coupled to said integration capacitance for storing charge integrated during sub-frame averaging periods of said frame period.