nco and phase detector

[D. Kruse]

I'm an analog engineer who's familiar with analog PLL's but not with
digital PLL's. I've been searching the internet for the NCO equivalent
of Kvd of an VCO and the Kphi of an 'exclusive or' phase detector. I
thought if I had those, I could use the analog transfer functions to
analyzer a PLL.

Also, can you point me toward any NCO vendor webpages that would have
some application note using their product in an DPLL.

Thanks for any help.

D. Kruse

 

[Andreas Schwarz]

D. Kruse wrote:

I'm an analog engineer who's familiar with analog PLL's but not with
digital PLL's. I've been searching the internet for the NCO equivalent
of Kvd of an VCO and the Kphi of an 'exclusive or' phase detector. I
thought if I had those, I could use the analog transfer functions to
analyzer a PLL.

Also, can you point me toward any NCO vendor webpages that would have
some application note using their product in an DPLL.

Thanks for any help.

D. Kruse

Hello,
from my understanding NCO and PLL are two different concepts
for freuqncy synthesis.
There are no feedback loops in an NCO.

http://www.analog.com
Search forirect Digital Synthesis (DDS)

For sure you can combine NCO + PLL in an advanced concept.
http://www.commdesignconference.com/archive/papers/2003/W221.htm

Regards, Andreas