Questions on the charge pump for PLLs.

[g94426]

Is there anyone could tell me how to design the charge pump circuits in front of the loop filter of a PLL? Is there any ICs available for this purpose? and how to select an appropriate IC?

I just start to learn to design a PLL and appreciate any help. Thanks first!

 

[eng_Semi]

Check this topic
u may find useful information

Also next time try to post ur question on the Analog Circuit Design forum to get more help

 

[g94426]

Thank you!
And I thought the output of my PLL is in GHz range so that the question should be posted here. I'll put it at the right place. Thanks again.

 

[eng_Semi]

Thank you!
And I thought the output of my PLL is in GHz

But the charge pump is operating at the reference frequency, which is in order of few MHz.

U r welcomed

 

[sreechoudhary]

u may get in www.zarlink.com