a pixel for an imaging device is described . the pixel includes a photosensitive device provided within a substrate for providing photo - generated charges , a circuit associated with the photosensitive device for providing at least one pixel output signal representative of the photo - generated charges , the circuit includes at least one operative device that is responsive to a first control signal during operation of the associated circuit and a pump circuit . the pump circuit may include substrate pumps , charge pumps and / or voltage pumps . the pixel may also be embedded in an imaging system .