Design of Quad-Edge-Triggered Sequential Logic Circuits for Ternary Logic.

We propose a quad-edge-triggered flip-flop which captures and propagates a ternary data signal at four-edges of a ternary clock signal. The proposed circuit uses carbon nanotube FETs and consists of four types of logic gate: ternary clock driver, standard ternary inverter, binary inverter, and transmission gate. HSPICE simulation result has confirmed that power consumption of QETFF is lower than conventional single-edge-triggered flip-flop. The average power consumption is reduced by 31 % in flip-flop and 75 % in clock tree. We designed a ternary serial adder using QETFF and the energy efficiency of the proposed circuit is significantly improved compared to the previous design of ternary serial adder.