Patent ID: 7956908

Claim:
An image sensing device comprising: a pixel sensor; a first charge storage element configured to store a reset charge received from the pixel sensor; a second charge storage element configured to store a pixel charge received from the pixel sensor; an analog bus including a reset line and a pixel line; a correlated double sampling device (CDS) comprising: a first driver configured to receive the reset charge from the first charge storage element and to provide a reset signal on the reset line; a second driver configured to receive the pixel charge from second charge storage element and to provide a pixel signal on the pixel line; and a CDS equalization device configured to equalize the reset charge stored on the first charge storage element with the pixel charge stored on the second charge storage element; a line equalization device configured to equalize electric potential levels between the reset line and the pixel line; and a differential amplification unit including inputs configured to receive the reset line and the pixel line, respectively, and wherein the differential amplification unit is further configured to provide first and second differential analog output signals corresponding to differentiated values of the reset signal and the pixel signal upon concurrent activation of the CDS equalization device and the line equalization device.