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

[mbeffa]

1 HZ PLL

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

 

[karesz]

1 HZ PLL

Hi,
did you checked pls other topics too?


K.

 

[kspalla]

1 HZ PLL

configure your divider to 4M then it is done

 

[biff44]

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