RAMP GENERATOR CIRCUIT, AND IMAGE SENSOR AND IMAGE CAPTURE DEVICE COMPRISING SAME

摘要

A ramp generator circuit (130) comprises a reference voltage generator unit (134), which, prior to a comparison operation of an analog-digital conversion circuit (120), converts a voltage of a reference signal (Vr) to a comparison apparatus setting voltage (VR) which corrects a voltage disparity between the reference signal (Vr) and an analog input signal (Vs1-Vsn), and outputs a ramp signal as a base point of the comparison apparatus setting voltage (VR) together with the commencement of the comparison operation. The ramp generator circuit (130) further comprises a function which adds a prescribed enhanced voltage (VA) to the comparison apparatus setting voltage (VR) prior to the comparison operation.