Adaptive oscillator for clock generation

A method comprising:

• generating, based on a regulated supply voltage and an output clock signal, a regulated supply signal at a first delay line of an oscillator circuit;
• generating, based on a droopy supply voltage and the output clock signal, a droopy supply signal at a second delay line of the oscillator circuit, wherein the second delay line has a same number and type of components as the first delay line;
• controlling a propagation delay of at least one of the regulated supply signal and the droopy supply signal based on a comparison between a number of reference clock cycles counted within a specified period and a number of clock cycles of the output clock signal counted within the specified period;
• and
• based on the output clock signal, sending the regulated supply signal from the first delay line and the droopy supply signal from the second delay line to an edge detector of the oscillator circuit, wherein:
• the edge detector is configured to generate the output clock signal;
• and
• an oscillation frequency of the output clock signal is based on a relationship between the regulated supply signal and the droopy supply signal.