Carbon-Based Sleep Switch Dynamic Logic Circuits with Variable Strength Keeper for Lower-Leakage Currents and Higher-Speed

摘要

A new variable strength keeper technique is presented in this paper for achieving higher-speed and lower-leakage currents in wide fan-in dynamic logic gates with carbon nanotube transistors. The strength of the keeper is dynamically adjusted depending on the logical state of the dynamic node during evaluation phase in a domino logic circuit. While providing similar noise immunity, the evaluation delay and power-delay product of the proposed domino logic circuits are reduced by up to 13.33% and 13.84%, respectively, as compared to the standard domino logic circuits in a 16nm carbon nanotube transistor technology. Furthermore, the proposed technique provides up to 77.98% savings in average leakage power consumption as compared to the standard domino logic circuits in idle mode.