Process, Voltage, and Temperature-stable Adaptive Duty Cycle based PUF
Mahmood J. Azhar, Selçuk Köse · 2018
A duty cycle controlled pulse width modulator (PWM) is designed and tailored to provide PVT (process, voltage and temperature) stable, duty cycle comparison based PUF primitive for security applications. The proposed circuit uses a current starved ring oscillator whose duty cycle can be controlled over a wide range of 20%-90%. This proposed PVT compensated circuit provides a stable and uniform duty cycle with a worst case error between 1%-2% over an operating temperature range of 0°C-100°C, supply voltage range of 0.95 V-1.05 V, and fast fast (FF) and slow slow (SS) manufacturing process conditions. This proposed reliable and controlled PUF primitive is configurable to accept controlled random digital inputs to provide random and configurable duty cycle output values over a wide range.