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Focal plane array readout employing one capacitive feedback transimpedance amplifier for each column

CAFC
  • US 5,043,820 A
  • Filed: 03/27/1989
  • Issued: 08/27/1991
  • Est. Priority Date: 03/27/1989
  • Status: Expired due to Term
First Claim
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1. A focal plane array readout circuit for use with a focal plane array having a predetermined number of rows and columns of detector elements, said readout circuit comprising:

  • an array of unit cells, each cell comprising charge storage and transfer means for receiving and storing charge derived from the detector elements of the focal plane array;

    row address means coupled to each row of unit cells of the array;

    a plurality of capacitive feedback transimpedance amplifiers, one capacitive feedback transimpedance amplifier coupled to the cells in each column of unit cells of the array for processing charge stored in the charge storage and transfer means of the unit cells;

    column multiplexing means coupled to respective ones of the capacitive feedback transimpedance amplifiers for multiplexing output signals provided thereby; and

    column address means coupled to the column multiplexing means for addressing each of the column multiplexing means and for coupling output signals provided thereby out of the readout circuit.

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