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

Question about Clock and Data Recovery,thanks.

Status
Not open for further replies.
S

swicap

Member level 5
Joined
Apr 4, 2004
Messages
86
Helped
14
Reputation
28
Reaction score
3
Trophy points
1,288
Activity points
637
for CDRs employing linear or bangbang PD,
what is there capture range ?

will cdr lose lock if large jitter appear in input data?
then what kind of jitter is more harmful? DJ or random jitter?

Is there possible method to design a robust lock in detect circuits to judge cdr in
lock or not?

Thanks.
 

swicap said:
for CDRs employing linear or bangbang PD,
what is there capture range ?

will cdr lose lock if large jitter appear in input data?
then what kind of jitter is more harmful? DJ or random jitter?

Is there possible method to design a robust lock in detect circuits to judge cdr in
lock or not?

Thanks.
Click to expand...

Normally, CDRs have limited capture range and needs a helping loop during acquisition.

Yes, there is a possible method to design a robust lock detect circuits that detects cdr locking and unlocking to a reference frequency within a predefined ppm error.

Check Razavi's book , Design of Integrated Circuits for Optical Communications, it has a complete chapter on CDRs
 
  • Like
Reactions: swicap

    S

    swicap

    Points: 2
    Helpful Answer Positive Rating
hi,MSSN,thanks for reply.
I just want to know exactly the deviation of frequcy that cdr can capture with pd alone.
I have read razavi's book already.
It doesn't descript circuit implementation on
CDR lock in detector design, I think.
Woule u give more details? Thank u.
 

jitter is large

range cannot cover the change
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top