PLL implementation

[bmwael1]

Posted on January 03, 2013 at 11:46

Hi

<3 Happy New Year 2013 <3

I want to implement PLL (

Phase-locked loop

) in STM32F4 Descovery Card

The Goal is to control output system frequency to be equal to the input frequency., to eliminate the noise effect

This is the diagram of PLL

I want to know have i to program any block only (PFD, LOOP FILTER) ?

Or are there any program implemented in STMEZF4 witch can be used directly ?

Thank You !

[Tesla DeLorean]

Posted on January 03, 2013 at 14:30

Not sure the STM32 is well suited to this task, the integer dividers of the timers are pretty lame.

What kind of frequency range did you have in mind?

I'm not sure I've seen any example code, so you'll probably need to think about how to implement it yourself. You might want to start with the signal generation part, and see if you can even get the output frequencies you want.