Patent ID: 8796608

Claim:
A device comprising: a first pixel comprising: a photosensor sensitive to a photoimpact; an output amplifier stage configured to output a sensor signal of the first pixel; and an intermediate amplifier stage coupled between the photosensor and the output amplifier stage; wherein: the intermediate amplifier stage comprises: a first intermediate transistor; and a second intermediate transistor; the first intermediate transistor comprises: a channel width of the first intermediate transistor; a channel length of the first intermediate transistor; a first terminal of the first intermediate transistor, coupled to an intermediate voltage node; a second terminal of the first intermediate transistor, coupled to an intermediate node; and a control terminal of the first intermediate transistor, coupled to a read signal node; and the second intermediate transistor comprises: a channel width of the second intermediate transistor; a channel length of the second intermediate transistor; a first terminal of the second intermediate transistor, coupled to the intermediate node; a second terminal of the second intermediate transistor, coupled to a ground; and a control terminal of the second intermediate transistor, coupled via an input node to the photosensor.