Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2008-06-30
2011-12-20
Epps, Georgia Y (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S208100
Reexamination Certificate
active
08080775
ABSTRACT:
A readout circuit for reading from addressable nodes comprises first and second half-circuits of a differential amplifier. The first half-circuit comprises at least one source follower transistor adapted to receive an input signal from one of the addressable nodes, such as pixel readouts of an imaging system. The first half-circuit further comprises a row selector switch coupled to the source follower transistor to selectively activate the source follower transistor to receive the input signal. The second half-circuit comprises an output node for providing an output signal of a readout of a selected addressable node. The second half-circuit further comprises a source leader transistor coupled to the output node to provide a feedback signal based on the readout. A feedback loop is connected to the source leader transistor to provide feedback from the output node for utilization in a differential amplification of the input signal.
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International Search Report and Written Opinion mailed Feb. 24, 2010.
Bui Pho Pascal M
Epps Georgia Y
Husch & Blackwell LLP
Lenzen Glenn H.
Raytheon Company
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