Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

How to calculate fmax in this circuit?

Status
Not open for further replies.

amitjagtap

Full Member level 5
Joined
Jan 10, 2007
Messages
304
Helped
42
Reputation
84
Reaction score
36
Trophy points
1,308
Activity points
3,273
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

Advanced Member level 5
Joined
Oct 15, 2005
Messages
1,804
Helped
257
Reputation
514
Reaction score
39
Trophy points
1,328
Location
India
Activity points
10,680
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

Full Member level 5
Joined
Jan 10, 2007
Messages
304
Helped
42
Reputation
84
Reaction score
36
Trophy points
1,308
Activity points
3,273
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

Advanced Member level 5
Joined
Oct 15, 2005
Messages
1,804
Helped
257
Reputation
514
Reaction score
39
Trophy points
1,328
Location
India
Activity points
10,680
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,,,,
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top