Voltage droop monitoring circuits, system-on chips and methods of operating the system-on chips

Abstract

In one embodiment, the voltage droop monitoring circuit includes a ring oscillator circuit block configured to generate a plurality of oscillation signals and configured to output a selected oscillation signal from one of the plurality of oscillation signals based on a first control signal. The first control signal is based on a power supply voltage of a functional circuit block. The voltage droop monitoring circuit further includes a counter configured to generate a count value based on the selected oscillation signal, and a droop detector configured detect droop in the power supply voltage of the functional circuit block based on the count value and at least one threshold value.

Dependencies are inferred from the claim text.