Questions on the charge pump for PLLs.

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!

Check this topic https://www.edaboard.com/ftopic120212.html
u may find useful information

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

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.

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

U r welcomed

u may get in www.zarlink.com