| Abstract: | An integrated circuit (IC) based physically unclonable function (PUF)
that comprises a common source amplifier for generating PUF output
voltages, a unity gain, negative feedback operational amplifier for
generating bias voltages, a voltage regulator and a bit exclusion circuit
that excludes unstable PUF bits. Compensation circuitry built into the
IC-PUF provides a high power supply rejection ratio and enables highly
reliable operation of the IC-PUF across varying input voltages and
operating temperatures. The IC-PUF generates a uniformly random output
bit stream by taking advantage of process variations that are inherent to
the fabrication of (metal-oxide semiconductor) MOS transistors. |