Leakage current characteristics of footed dual Vt dominos in nanometer CMOS technologies

A new method is proposed that uses a combined approach of inputs state assignment and clock signal assignment for idle footed dual V_t dominos at two typical die temperatures in nanometer CMOS technologies. Simulations based on 45nm BSIM4 models show that the previously CHIH state (the clock signal and inputs are all high) is only effective to suppress the leakage current of footed dual V_t dominos at high temperature excluding the high fan-in wide gates for the gate leakage current produced by the footer NMOS. For the high fan-in footed dominos at high temperature and all types footed dominos at room temperature, the CLIH (the clock signal is low and inputs are high) and CLIL (the clock signal and inputs are all low) states are preferable to reduce the leakage current. Further, the influence of the process parameter variations on the leakage current characteristics of the footed dual V_t dominos is also evaluated