Patent ID: 8841595

Claim:
An image sensor comprising: an array of pixels, each pixel having at least one photo-sensitive element, readout circuitry operable to receive an analog signal from each pixel at a first time and at a second time, the signal level between said first and second times varying in dependence with the light sensed by said photo-sensitive element, said signal level at said first and second times including pixel noise; and a voltage regulator circuit including: an input stage configured to receive a reference signal and a feedback signal and generate a control voltage; a sample and hold circuit configured to sample and hold the control voltage during a time period starting before said first time and ending after said second time; and an output stage configured to generate the feedback signal and further configured to generate, in response to the sampled and held control voltage, a regulated output voltage for application as a supply voltage to the array of pixels and readout circuitry.