METHOD FOR ACCESSING A PIXEL AND A DEVICE HAVING PIXEL ACCESS CAPABILITIES

A method for accessing a pixel, the method includes: providing a fixed reference current to a readout circuit that is coupled to a pixel, wherein the fixed reference current is indifferent to changes in a pixel output current drained by the pixel; wherein a value of the pixel output current is responsive to light impinging on the pixel during an integration period; and sampling a difference signal that is responsive to a different between the fixed reference current and the pixel output current while providing the fixed reference current to the readout circuit.