how to phase-lock a 4 MHz clock with a 1 Hz signal?

Status
Not open for further replies.
M

mbeffa

Newbie level 5
Joined
Mar 31, 2010
Messages
8
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
California
Activity points
1,339
1 HZ PLL

Anybody knows how to phase-lock a 4 MHz clock with a 1 Hz signal?
Very low jitter is required.
 

1 HZ PLL

Hi,
did you checked pls other topics too?


K.
 

Re: 1 HZ PLL

You will not be able to clean up any jitter on a 4 MHz oscillator by locking it to a 1 Hz reference. That is just not how things work! The reason is that you will have a very narrowband PLL, AND you will have a huge transport lag in your 4 million divider chain. You will get whatever jitter the free-running 4 MHz oscillator has, so you had better pick a good quality 4 MHz crystal VCO.

Rich
 
Last edited by a moderator:

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…