Focal plane array integrated circuit with individual pixel signa

Details Focal plane array integrated circuit with individual pixel signa Focal plane array integrated circuit with individual pixel signa

1995-06-07

1998-03-17

Peng, John K.

Television

Responsive to nonvisible energy

348164, 348216, 348222, 348241, 250330, 250332, 2503381, H04N 533, H04N 5335

Patent

active

057292850

ABSTRACT:
This is a monolithic infrared detector readout circuit for a capacitive sensing element 111 wherein a high gain preamplifier 115 is biased by a large bias element 113, e.g. on the order of 10.sup.12 ohms. The output of the preamplifier 115 is band-limited by a low pass single-pole filter 117 having a high value resistive element 119, e.g. on the order of 10.sup.9 ohms, and then is clamped by a clamp circuit 131 to a stable reference in a manner that doubles the amplitude of the signal and minimizes low frequency bias shifts and fixed pattern noise. The output of the clamp circuit 131 is buffered by buffer 123 prior to being multiplexed by row address signals. The output from a multiplex switch 125 is then applied to the column line for output to a video circuit or the like.

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