Flip Flop timings issues

[amitjagtap]

hi all,
I read about FF timings and fmax calculations without clock skew.
I need to 1. fmax calculation with clk skew(both + & -ve)
2. Roll of data to Q delay, whether it should be included in formula for fmax
when skew is present.
3. Skew Calculations
4. With skew fmax will increase or decrease (i think it will decrease).
5.and ways to avoid setup & hold time violations.

I searched these topics on internet, i have got some idea also,but not much clear.
I get confused when i think of these issues and when slove problems.
Plz help me out of this,if anybody can..
waiting very eagerly....
Amit

 

[kpsai26779]

Hi amit,

Better way to under stand timing concepts is by practicing different examples But practice by drawing "wave forms " rather than simple equations

for some basic concepts see topic

 

[gck]

Hi,

For all you issues visit following, eda board post of mine.


I have attached one prestation regarding this issues. That ppt will defanetly help

 

[amitjagtap]

hi gck,
thanks to upload such a helpful PPT
I read the ppt.
In that Max TpFF term is used for TpHL or TpLH for cal fmax of single FF.
Further same term is used for Tclk_q.is it like this or Max TpFF is same TpLH or TpHL.