Optimizing and Comparing CMOS Implementations of the C-element in 65nm technology: Self-Timed Ring Case
Résumé
Self-timed rings are a promising approach for designing high-speed serial links or clock generators. This study focuses on the ring stage components – a C-element and an inverter - and compares the performances of different implementations of this component in terms of speed, power consumption and phase noise. We also proposed a new self-timed ring stage - only composed by a C-element with complementary outputs - which allows us to increase the maximum speed of 25% and reduce the power consumption of 60% at the maximum frequency. All the electrical simulations and results have been performed using a CMOS 65nm technology from STMicroelectronics.