Patent ID: 7567280

Claim:
A solid-state imaging device comprising: a pixel array block including unit pixels each having photoelectric conversion units two-dimensionally arranged in a row and column array and column signal lines wired for each column with respect to the row and column arrangement of the unit pixels; a row scanning device that selectively controls the respective unit pixels in the pixel array block on a row-to-row basis; and an analogue-digital conversion device that compares an analogue signal outputted from the unit pixel of a row which is selectively controlled by the row scanning device via the column signal line with an inclined reference signal, and converts the analogue signal into a digital signal on the basis of a comparison period; the analogue-digital conversion device including: a comparing device having two input terminals, a reset device that resets potentials at the two input terminals and having a configuration of a differential amplifier that compares the analogue signal applied to one of the two input terminals with a reference voltage applied to the other of the two input terminals a counting device that counts a comparison period from initiation to completion of comparison performed by the comparing device; and a changing device that changes a voltage at the other input terminal to a predetermined voltage after a resetting operation performed by the reset device.