Patent ID: 8164666
Filing Date: 2012-04-24
Classification: H04N

Abstract:
1. A method for providing a sampled voltage to pixels of a pixel array, the method comprising: sampling an input voltage during a sampling phase to provide a sampled voltage, wherein the sampling comprises: providing the input voltage to a source of an transistor; providing a gate circuit, from a bootstrap circuit, to a gate of the transistor; wherein the gate voltage exceeds a supply voltage; and allowing a capacitor that is coupled to a drain of the transistor to be charged to the input voltage to provide a sampled voltage; storing, during a hold phase, the sampled voltage and outputting the sampled voltage to multiple pixels of a pixel array; wherein the storing comprises: keeping the gate, source and drain of the transistor at the same potential; and disconnecting the source of the transistor from an input port through which the input voltage was provided; wherein the transistor is an NMOS transistor; wherein the method further comprises: grounding a bulk of the NMOS transistor during the sampling phase; disconnecting the bulk of the NMOS transistor from the ground during the hold phase; and disconnecting the gate of the NMOS transistor from the bootstrap circuit during the hold phase.