Patent ID: 11947672
Assignee: NXP B.V.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. An integrated circuit comprising:
a voltage glitch detection circuit configured to detect a voltage glitch;
wherein the voltage glitch detection circuit includes,
a ring oscillator having a plurality of stages connected in a ring with an output node located at an output of each of the plurality of stages;
a plurality of counters, each of the plurality of counters having an input coupled to the output node of each of the plurality of stages in the ring oscillator;
a combined result circuit coupled to an output of each of the plurality of counters,
wherein the combined result circuit is configured to combine counter values from the plurality of counters for a predetermined time period to generate a combined result value; and
a result evaluation circuit configured to compare the combined result value, with a reference value, and configured to generate a voltage glitch indication signal if the comparison is outside of a threshold range.