COMBINED PROGRAMMABLE GAIN AMPLIFIER AND COMPARATOR FOR LOW POWER AND LOW AREA READOUT IN IMAGE SENSOR

摘要

The switchable amplifier and comparator circuit includes an operational amplifier having an inverting input, a non-inverting input, a first differential output and a second differential output, a first differential output switchably coupled to the inverting input and a second differential output non- It is switchably coupled to the inverting input. The first feedback capacitor is coupled to the inverting input and switchably coupled to the first differential output, and the second feedback capacitor is coupled to the non-inverting input and switchably coupled to the second differential output. The capacitive load is switchably coupled between the first differential output and the second differential output. A diode clamp circuit is switchably coupled between the first differential output and the second differential output. The resistive load is switchably coupled between the first differential output and the second differential output.