Design Pulse-Triggered Flip-Flop Based on Signal Feed-Through Scheme with Low-Power

Abstract

Practically, clocking system like flip-flop (FF) consumes large portion of total chip power. In this paper, a novel low-power pulse-triggered flip-flop (FF) design is presented. Pulse- triggered FF (P-FF) has been considered as a popular alternative to the conventional master –slave based FF in the applications of high speed. First, a simple two-transistor AND gate design is used to reduce the circuit complexity. Second, a conditional pulse-enhancement technique is devised to speed up the discharge along the critical path only when needed. As a result, transistor sizes in delay inverter and pulse-generation circuit can be reduced for power saving. The maximum power saving against rival designs is up to 39.4%.Compared with the conventional transmission gate-based FF design; the average leakage power consumption is also reduced by a factor of 3.52.