How to calculate fmax in this circuit?

[amitjagtap]

hi all,
In the fig below how to cal fmax.
what will be the skew here.
Is there any use of Tdata_q.if yes what it is?
thanking you,
Amit

 

[A.Anand Srinivasan]

Re: how to cal fmax here

Tclk≥Tskew+Tdata_q+Tsetup.... Tdata_q is the time required for the q to come out after the input has been given....

 

[amitjagtap]

Re: how to cal fmax here

hellow sir,
If i'm not wrong the formula for Tclk is

Tclk≥Tskew+Tpd+Tsetup. ---- Tpd is propagation delay of combi logic
I have never seen Tdata term included in cal of Tclk.
again there is skew present in clk. then it should be considered for Tclk cal.
Thinking you,

 

[A.Anand Srinivasan]

Re: how to cal fmax here

here there is no combinational logic but a D flip flop and the propagation delay of data to the Q has been given by Tdata_q so only i have used Tdata_q instead of Tpd,,,,
the skew of the clock is accounted for using Tskew,,,,