Patent ID: 11967351
Assignee: NATIONAL TAIWAN UNIVERSITY
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 9:
10. A method, comprising:
receiving by a physical unclonable function (PUF) generator a challenge input;
accessing a first bit cell in a PUF cell array in response to a word line address associated with the challenge input, wherein accessing the first bit cell comprises:
in a read operation, comparing by a sense amplifier a first voltage at a first terminal of a first memory cell in the first bit cell with a second voltage at a first terminal of a second memory cell in the first bit cell to generate an output signal,
wherein second terminals of the first and second memory cells are coupled together to receive a read voltage; and

outputting by the PUF generator a PUF response output, according to the output signal, having a high logic state when the first voltage is greater than the second voltage or having a low logic state when the first voltage is smaller than the second voltage.