Systems and methods for a time domain voltage reference with zero quiescent current consumption

A method comprising:

• outputting, via a first programmable voltage delay line, a first delay signal having a first delay that is based at least in part on an input voltage for a system;
• outputting, via a second programmable voltage delay line, a second delay signal having a second delay that is based at least in part on a first voltage difference between the input voltage and an analog reference voltage for the system;
• outputting, via a phase detector configured to receive the first delay signal and the second delay signal, a first one or more command signals that are based at least in part on a first time difference between the first delay and the second delay, wherein the first time difference corresponds to the first voltage difference;
• outputting, via a counter configured to receive the first one or more command signals, a first counter signal indicative of a first value of a count of the counter, wherein the first value is based at least in part on the first one or more command signals;
• and
• storing the first value via a storage element, wherein the first programmable voltage delay line is configured to use the first value as a digital reference corresponding to the analog reference voltage.