Comparison of Conditional Techniques for Implicit and Explicit Pulsed- Triggered Flip-flops in Terms of Power and Delay

This paperreviews the three Conditional techniques for high performance flip-flops namely Conditional Precharge, Conditional Capture and Conditional Discharge. The classification of these techniques is based on how to prevent or reduce the unnecessary internal switching activities and reviewed in terms of Power and Delay.Comparison summary of flip-flops characteristics based on these techniques are specified and simulation is carried out. The simulation is carried out by TANNER EDA TOOL using 180 nm CMOS technology, 1.8V power supply and clock frequency of 250MHz is used for Single edge triggered whereas 150MHz used for double edge triggered Flip-Flops.