How does Accumulator-type DCO work?

[yellow_tulip_84]

accumulator dco

Can anyone understand how Accumulator type DCO work? I just simply know DCO using accumulator with Adder N-bits and the number K, which is the number being added into adder at every clock in order to generate the desired frequency. Actually, i don't understand how it can operate? and what is the purpose of K for this implement?

Thanks in advance.

 

[amitjagtap]

how does an accumulator work

hi
sorry i m in hurry now...no time to explain...for u i m posting one doc. just go thro it. it will give a clear idea.

 

[amitjagtap]

how does accumulator work

it is quite easy --- it is just repeated addition....each time accumulator holds the result.. then its MSB gives square wave output and result given to LUT of sine gives corrosponding sine values

Added after 1 minutes:

Well the value of frequency output dependes on the numner K and clock frequency

 

[yellow_tulip_84]

accumulator based dco

Thx for your help.

i read through the pdf and found the Fig6 (Detailed block diagram of DDS) quite difficult to understand how Accummulator DCO work. There is one thing i'm still confusing:

How does the number K added in adder in every clock help to decrease the frequency by 2^N/K times?

wish i don't bother you so much. Anyway, thx for your reply.