high performance d flip flop using low power clocking system

[prathyusha430]

can I know how to calculate w/l ratio for a circuit for 130nm technology and how to determine setup time and hold time for a flip flop

 

[erikl]

For the w/l ratios you could probably use min. size values. Perhaps adapt the load driver stage to a w/l value appropriate for the load.

For setup & hold time determination e.g. see this HSPICE User Guide Simulation and Analysis, Chapter 19, pp. 674 ff. for the timing, and perhaps Bisection/Passfail simulator options.

 

[kenambo]

For a flip flop you use digital circuits so first select a minimum size for an inverter by proper switching point that is Vdd/2.

use this as a minimum size and scale this size according to your loading.