Low power autozero of pixel amplifier

摘要

The present invention generally relates to a photosensor array including a plurality of photosites; an amplifier associated with each photosite and including a plurality of transistors, wherein the amplifier includes autozeroing transistors for autozeroing at low power to remove voltage offsets in the amplifier; a transfer circuit associated with each photosite for transferring a charge on the photosite to a reset node interposed between the photosite and amplifier.