CPC H03K 21/403 (2013.01) [H03K 3/0315 (2013.01); H03K 19/017509 (2013.01); H03K 21/08 (2013.01)] | 20 Claims |
1. A circuit, comprising:
a first digital power supply that provides a first supply voltage to first digital functional circuitry during use, wherein the first supply voltage is determined based on one or more properties of the first digital functional circuitry;
a second digital power supply, wherein the second digital power supply provides a second supply voltage to second digital functional circuitry, the second supply voltage having a magnitude that remains above a minimum voltage magnitude during use;
a first circuit configured to assess one or more local operating properties, wherein the first circuit includes:
a first sensor circuit coupled to the second digital power supply, wherein the first sensor circuit is configured to provide an output signal responsive to a value of a first local operating property of the first digital functional circuitry;
a first level shifter coupled to the first sensor circuit, the first level shifter being configured to receive the output signal from the first sensor circuit and provide a first shifted output signal corresponding to the first supply voltage; and
a first counter coupled to the first level shifter, wherein the first counter is configured to receive the first shifted output signal and capture a first value representing the first shifted output signal.
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