Please expain to me why DLL has no jitter accumulation...

[zhangjavier]

jitter accumulation

thanks

 

[sengyee88]

jitter accumulation vco

Because DLL has clock input, it is just a delay element for the input clock. It will resynchronized to input and jitter accumulation will be reset.

PLL do not has input clock, it generate its own clock from VCO. Hence, jitter will be accumulated.

 

[liuyonggen_1]

clock jitter accumulation

Because DLL has clock input, it is just a delay element for the input clock. It will resynchronized to input and jitter accumulation will be reset.

PLL do not has input clock, it generate its own clock from VCO. Hence, jitter will be accumulated.

i will start to design PLL, could you show me some useful books about analog PLL? thanks !

 

[amanath]

even i need.. plz uplaod.. thanx!

 

[ahmad_abdulghany]

Re: Please expain to me why DLL has no jitter accumulation..

Because DLL has clock input, it is just a delay element for the input clock. It will resynchronized to input and jitter accumulation will be reset.

PLL do not has input clock, it generate its own clock from VCO. Hence, jitter will be accumulated.

i will start to design PLL, could you show me some useful books about analog PLL? thanks !

Read Dean's book.. you can download it for free from National website..

Regards,
Ahmad,

 

[khouly]

Re: Please expain to me why DLL has no jitter accumulation..

i think it's from the nature of the VCO , which is a integrator or accumulator

Khouly

 

[hung_wai_ming@hotmail.com]

Hi sengyee88

I sort of do not understand. PLL is synchronized with a clean external clock and it is a closed loop system, so the jitter should be reset somehow finally. Did I get the wrong message?

 

[butterfish]

Re: Please expain to me why DLL has no jitter accumulation..

Because DLL has clock input, it is just a delay element for the input clock. It will resynchronized to input and jitter accumulation will be reset.

PLL do not has input clock, it generate its own clock from VCO. Hence, jitter will be accumulated.

I'm not clear, if it is not freerun, PLL also have reference input clock, clock_gen will lock with clock_ref, why jitter be accumulated?

 

[Patrick520]

Re: Please expain to me why DLL has no jitter accumulation..

Read Dean's book.. you can download it for free from National website..

Regards,
Ahmad,

Hi.
Can you tell me what is the name of the Deam's book?
Thanks.