Patent ID: 11888467
Assignee: RAYTHEON COMPANY
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A system comprising:
an analog complementary metal oxide semiconductor (CMOS) physically unclonable function (PUF) cell having at least one gate terminal; and
a current-based temperature compensation circuit comprising:
a reference buffer configured to receive a biasing reference voltage at a voltage input terminal and replicate the biasing reference voltage to first and second buffer terminals, at least one of the first and second buffer terminals electrically connected to the at least one gate terminal of the CMOS PUF cell;
a biasing current mirror configured to receive a reference current at a current input terminal and replicate the reference current to the first buffer terminal; and
a controller configured to compensate an output of the CMOS PUF cell for temperature variation based on a weighted sum of a bandgap current, a current proportional to absolute temperature, and a current complementary to absolute temperature.