Patent ID: 9557354
Date: 2017-01-31
CPC Classifications: G01R,H03K

Claim:
1. A switched-capacitor comparator circuit comprising: a first switch configured to receive an input reference voltage; a second switch configured to receive an input testing voltage, wherein the first switch and the second switch are electrically connected in parallel; a capacitor electrically connected in series with the first switch and the second switch; a feedback stage comprising a feedback inverter electrically connected in parallel with a feedback switch, wherein the feedback stage is electrically connected in series with the capacitor; a first inverter electrically connected in series to the feedback stage and configured to receive an output voltage of the feedback stage; a third switch electrically connected in series with the first inverter; and a second inverter electrically connected in parallel to a third inverter, wherein the second inverter and the third inverter are electrically connected in series to the third switch, the second inverter is configured to output a first output signal to an input of the third inverter during a whole cycle of operation of the switched-capacitor comparator circuit, and the third inverter is configured to output a second output signal that is received by an input of the second inverter during a whole cycle of operation of the switched-capacitor comparator circuit.