Patent ID: 8384579

Claim:
A non-transitory computer processing system comprising: an analog to digital converter ADC circuit that includes: a discharge circuit including: an amplifier, wherein a first input of the amplifier is coupled to a first ground level, and a discharge capacitor coupled between an output of the amplifier and the first ground level; and a divider circuit coupled to the discharge circuit via the first ground level, the divider circuit including: a first divider capacitor, a first divider switch coupled in parallel to the first divider capacitor, a second divider capacitor coupled in parallel to the first divider capacitor, a third divider switch coupled in series between the first divider capacitor and the second divider capacitor, wherein the first divider switch is coupled between the first ground level and the third divider switch, and the first and second divider capacitors are coupled between a second ground level and the third divider switch.