Television – Camera – system and detail – Solid-state image sensor
Reexamination Certificate
2005-07-29
2009-10-20
Jerabek, Kelly L (Department: 2622)
Television
Camera, system and detail
Solid-state image sensor
C257S290000, C250S208100
Reexamination Certificate
active
07605854
ABSTRACT:
The present invention includes operational amplifier for an active pixel sensor that detects optical energy and generates an analog output that is proportional to the optical energy. The active pixel sensor operates in a number of different modes including: signal integration mode, the reset integration mode, column reset mode, and column signal readout mode. Each mode causes the operational amplifier to see a different output load. Accordingly, the operational amplifier includes a variable feedback circuit to provide compensation that provides sufficient amplifier stability for each operating mode of the active pixel sensor. For instance, the operational amplifier includes a bank of feedback capacitors, one or more of which are selected based on the operating mode to provide sufficient phase margin for stability, but also considering gain and bandwidth requirements of the operating mode.
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European Search Report dated Jul. 30, 2008.
Broadcom Corporation
Jerabek Kelly L
Sterne Kessler Goldstein & Fox P.L.L.C.
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