Patent ID: 7113213

Claim:
An image system comprising: a one-dimensional array of image sensors configured to photoelectrically convert an optical image into an electrical signal corresponding to a light amount of the optical image in units of the image sensors, each of the image sensors comprising a photoelectric converter, an amplification transistor having a gate to which said photoelectric converter is connected through a transfer transistor and for amplifying an output signal from said photoelectric converter and outputting the electrical signal, a selection transistor having a gate to which a selection signal is supplied, and a reset transistor connected to a connection point between said amplification transistor and said transfer transistor; noise cancellers, each of which is connected to an image sensor and subtracts a noise component from the electrical signal, each of the noise cancellers comprising a sample/hold capacitor to which the electrical signal from said image sensor is supplied through a clamp capacitor and a sample/hold transistor, and a clamp transistor connected to a connection point between said clamp capacitor and said sample/hold transistor; and a semiconductor substrate including a p − -type impurity base layer and a p + -type impurity layer formed thereon, and wherein said array of image sensors is formed in said p + -type impurity layer.