Patent ID: 9723241
Date: 2017-08-01
CPC Classifications: H04N

Claim:
1. An image sensor circuit with a power noise filtering function, comprising: an image sensing unit, for sensing an image to generate an image sensed signal; a power noise sensing unit, for sensing a power noise to generate a power noise signal; a differential amplifier circuit, which is coupled to the image sensing unit and the power noise sensing unit, for receiving the image sensed signal and the power noise signal, and generating a differential filtered signal by a differential amplification operation between the image sensed signal and the power noise signal; and an analog-to-digital converter (ADC) circuit, which is coupled to the differential amplifier circuit, for receiving the differential filtered signal, to generate a digital image signal, wherein the ADC circuit includes: wherein the differential amplifier circuit includes: wherein the ADC circuit includes a hysteresis comparator, which includes two hysteresis input terminals coupled to the two differential output terminals respectively, wherein the hysteresis comparator generates the for-count signal according to the voltage difference ΔV, a ramp voltage, and a reference voltage.