Patent ID: 11962305
Assignee: NXP B.V.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A random number generator circuit comprising:
a first ring oscillator having a plurality of series-connected stages coupled together in a ring, wherein an output of a last stage of the first ring oscillator is coupled to an input of a first stage of the first ring oscillator;
a plurality of sampling circuits, a sampling circuit of the plurality of sampling circuits having an input coupled to a node located between two adjacent stages of the plurality of series-connected stages, wherein every node of the first ring oscillator is coupled to a corresponding sampling circuit of the plurality of sampling circuits;
a second ring oscillator having an output; and
a counter having an input coupled to the output of the second ring oscillator, and an output, wherein the second ring oscillator and the counter are for providing a sampling pulse for controlling sampling of the first ring oscillator using the plurality of sampling circuits.