Patent ID: 9209221
Filing Date: 2015-12-08
Classification: H01L,H04N

Abstract:
1. An image sensor system comprising: an input receiving photogenerated electricity, and coupling said photo generated electricity to a first photodiode to integrate said photogenerated electricity in said first photodiode as an integrated value; a transfer gate, which is in a first state that prevents the integrated value from passing, and in a second state that allows the integrated value to pass; a second gate that stores charge from the integrated value when transferred via the transfer gate; a third gate that in a first state that prevents the charge on the second gate from passing, and in a second state that allows the charge on the second gate to pass; a second diode, receiving the charge stored in the third gate when the third gate allows the charge to pass, and accumulating electricity transferred from the transfer gate, said second diode connected to an output where said output produces a value indicative of a reset value at a first time and produces an output indicative of the photogenerated electricity at a second time.