Monte Carlo analysis of a low power domino gate under parameter fluctuation

Abstract

Using the multiple-parameter Monte Carlo method, the effectiveness of the dual threshold voltage technique (DTV) in low power domino logic design is analyzed. Simulation results indicate that under significant temperature and process fluctuations, DTV is still highly effective in reducing the total leakage and active power consumption for domino gates with speed loss. Also, regarding power and delay characteristics, different structure domino gates with DTV have different robustness against temperature and process fluctuation.

Robustness aware high performance high fan-in domino OR logic design

“…Noise immunity is defined as the signal amplitude at the inputs that induced a 10%-V dd drop in the voltage at the output of domino OR gate. The noise signal is assumed to be a wave with 500 ps duration and 80% duty cycle [7] .…”

“…As the body voltage V b decreases below V dd , V th of the keeper will be reduced (Eq. (2) [7] ), increasing the contention current as compared to a zero body biased keeper with the same physical dimensions. A keeper with low body voltage, therefore, improves the noise immunity characteristics as compared to conventional domino logic with the same keeper physical size.…”