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Physically unclonable functions (PUFs) facilitate many security applications such as secure key generation, device authentication, counterfeiting detection and prevention. This paper presents an area efficient PUF with high reliability. We exploit the process variation of a single load transistor for the current mirror working at the subthreshold region, which is converted to a unique digital signature...
In this paper, we present a novel on-chip physical unclonable function (PUF) based on the cascode current mirrors. It exploits the process variation of a single transistor as the load of the current mirror to generate a reliable digital signature for the chip. By employing a cascode NMOS transistor in the current-mode PUF architecture, the proposed PUF greatly boosts the output impedance. As a result,...
The level shifters are crucial primitives in the multi-supply voltage circuits and systems. In this paper, an energy-efficient level shifter is proposed to achieve the conversion from the subthreshold voltage to the above threshold voltage. It is a hybrid structure consisting of the Wilson current mirror and the cross-coupled level shifter. By addressing the voltage drop issue of the level shifter...
In this paper, we present a novel physical unclonable function (PUF) based on time-domain current difference measurement. By employing the aforesaid simplified current-mode PUF architecture, the proposed implementation completely removes the need of complex error correction circuitry, which is widely adopted in the previously demonstrated implementations. This leads to significant reduction of both...
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