effect of voltage scaling on set-up and hold times

[shiva20587]

Hi All,

Let's say we have a flip-flop operating at 1.2v power supply, how does the set-up time of this flip-flop get affected by the power supply variations?

If voltage drops ,does the set-up time increase? And why does it increase?

Thanks in advance,

Regards,
Shiva.

 

[chiranjeevinaidu]

if any cell varies depends upon pvt conditions.below once
1.process
2.voltage
3.temperature
for example:
if the cell voltage 0.9v ,cell delay: 0.02ps these values are taken as ruff values,
if cell voltage is decreased to 0.87 ,then delay of cell is increased.becaz transition time of cell take longer time.it will causes slew violations.so setup time will be degrade
if cell voltage is increased it will help setup time.


Thanks
chiranjeevi.pandamaneni