Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics 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

input/output characteristics of the PFD

Status
Not open for further replies.
E

Engineer4ever

Member level 3
Joined
Feb 2, 2013
Messages
67
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,288
Activity points
1,748
Hi :)

I am trying to draw the input/output characteristics of the PFD on Cadence to check the dead zone. I tried to find a way to simulate the dead zone but I failed. Would anyone help, please?

Thanks in advance,
 

PFD has a transfer function being as Current/Phase Difference.Apply two square wave signal generator with same frequency and with same duty cycle, do a transient simulation.Fix one of them and change the phase of the second one from -PI to PI by small phase differences-for instance 1 degree- and observe current output and draw this transfer function in Cadence.You will see deadzone.
 

BigBoss said:
PFD has a transfer function being as Current/Phase Difference.Apply two square wave signal generator with same frequency and with same duty cycle, do a transient simulation.Fix one of them and change the phase of the second one from -PI to PI by small phase differences-for instance 1 degree- and observe current output and draw this transfer function in Cadence.You will see deadzone.
Click to expand...

First of all, thanks for your reply :)

Does your answer mean that I will memorize the change in the PFD o/p versus every phase difference and tabulate the results then draw them on Excel for example? I thought about that but I think there might be a way to draw the PFD cs/s directly on cadence, using sweeping on the phase difference, but I still don't know how to draw it versus the o/p.

If that's not what you mean, would you please explain a little more?
 

Engineer4ever said:
First of all, thanks for your reply :)

Does your answer mean that I will memorize the change in the PFD o/p versus every phase difference and tabulate the results then draw them on Excel for example? I thought about that but I think there might be a way to draw the PFD cs/s directly on cadence, using sweeping on the phase difference, but I still don't know how to draw it versus the o/p.

If that's not what you mean, would you please explain a little more?
Click to expand...
If you draw "Current versus Sweeping Variable" , the deadzone will be visible
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top