A new low-power dynamic circuit for wide fan-in gates

Abstract

In this paper, a new dynamic circuit is proposed to reduce the power consumption of wide fan-in gates. Since the voltage difference across the pull-down network determines the output in the proposed circuit, the voltage swing on the pull-down network can be lowered to decrease the dramatically increasing power consumption of wide fan-in gates. Wide fan-in OR gates are designed and simulated using the proposed domino circuit in 90nm CMOS technology. Simulation results exhibit up to 2.62X improvement in noise immunity and 44% reduction in power consumption compared to the conventional domino circuits at the same delay. Moreover, a 2-read, 1-write ported 64-word × 32-bit/word register file is designed using the proposed domino circuit. The Register file is simulated using low-Vth 90nm CMOS model in all process corners. The results shows 25% power reduction and 32% speed improvement for the proposed register file in comparison with the conventional register file at the same noise margin floor.