Low Power and High Performance MTCMOS Conditional Discharge Flip Flop

Abstract

Power consumption in high performance integrated circuits have been one of the
most serious constraints in designs recently. The conditional discharge flip flop(CDFF)
belonging to one of the fastest pulse triggered flipflop reduces internal switching activities
as that of existing explicit pulse triggered Data close to output flipflop (Ep-DCO). Registers
are the main parts for processing information eg: in counters, accumulators etc.,.
Implementation of these registers using CDFF can achieve low power consumption and
high performance. MTCMOS (multi threshold CMOS) technique saves the leakage power
during standby mode operations and hence, enhances the circuit performance for long
battery life applications. We find that, using both MTCMOS and conditional discharge
technique in flip flop, improves the performance and also consumes low power. In this
paper, we simulate CDFF and the proposed MTCMOS CDFF to prove that MTCMOS CDFF is
the best among the fastest pulse triggered flipflops. We also implement an application 4 bit
shift register using proposed MTCMOS conditional discharge flip flop.