Patent ID: RE43314

Claim:
An active pixel sensor circuit comprising: a photodetector; an access transistor connected to the photodetector; an electronically reconfigurable transistor, successively operated as a source follower driver and a feedback amplifier, connected to an output of the access transistor and to a signal output bus; a reset transistor connected between the access transistor and the electronically reconfigurable transistor, wherein the reset transistor is reset with a tapered reset signal; and a first column buffer connected to the electronically reconfigurable transistor and to the reset transistor, the first column buffer comprising: a first switch transistor connected to the reset transistor; and a second switch transistor connected to the electronically reconfigurable transistor; wherein during a reset operation, the first and second switch transistors connect transistor connects the reset transistor with the electronically reconfigurable transistor to form a feedback path.