Patent ID: 8324548
Filing Date: 2012-12-04
Classification: H03F

Abstract:
1. A pixel circuit comprising: at least one pixel including a photosensor and a transfer transistor; a charge storage node configured to be electrically connected to said photosensor when said transfer transistor is activated; an amplifier having an input node and an output node, the input node electrically connected to said charge storage node; and a feedback loop electrically connected between said input node and said output node of said amplifier, said feedback loop comprising a capacitance element and a reset transistor electrically connected in parallel to said capacitance element during operation of said pixel, wherein said reset transistor is configured to receive a reset control signal and said transfer transistor is configured to receive a transfer control signal from a control circuit, and wherein said control circuit is configured to deactivate said reset transistor and activate said transfer transistor to form a capacitance divider between said capacitance element and said photosensor.