How to implement software PLL in DSP?

[kirgizz]

Hello,

I'm dealing with synchronisation issue, that is a big problem for me.
I read some ebooks about PLL so I understand (theoretically) its
functionality.

My DSP must be able to generate (internally) a sine wave which is
frequency-locked to an external TTL reference signal with an error
about 0.01Hz (at 20kHz). The frequency range of the external signal is
20Hz-20kHz. I use the DSP in place of VCO, but it doesn't work proper.

I read about software PLL and I would like to implement it on my DSP.
I've heard that it's possible for input frequencies up to 100kHz (depending
on the performance of the dsp chip). It should work like PID.


Did anyone here something like this?

I need some help how to do it (software blocks, examples and so on).



Thank you in advance
kirgizz

 

[me_lolly]

software pll in dsp

Hi Kirgizz,
I cant help u out right now but cud u send me some ebooks on PLL... i badly need them

 

[kirgizz]

Re: software pll in dsp

Hi me_lolly,

I read the book from Roland E.Best "Phase-Locked Loops".
Use search on EDAboard.com, I saw this book somewhere here. It's about 44 MB.


Regards,

kirgizz