On-die techniques for asynchnorously comparing voltages

A comparison circuit, comprising:

• a comparison capacitor having a first terminal that is coupled to both a first terminal of a first switch and a first terminal of a second switch and having a second terminal that is coupled to both a first terminal of a third switch and an input of an inverter;
• a first input that applies a sense signal to a second terminal of the first switch;
• a second input that applies a reference voltage to a second terminal of the second switch, wherein the reference voltage is determined based on whether the sense signal is associated with a current source or a current sink;
• the inverter having an output that is coupled to both a second terminal of the third switch and a first terminal of a fourth switch;
• and
• the fourth switch having a second terminal that is coupled to a first terminal of a fifth switch and a first output of the comparison circuit,
• wherein, during operation, the first switch and the fourth switch are turned on during a comparison mode and turned off during a reset mode, and the second switch, the third switch, and the fifth switch are turned on during the reset mode and turned off during the comparison mode.