What is a charge pump ?

[Johnson]

What is charge pump, and where I can find more info about it? I mean which book?

 

[Gomez]

Re: Charg Pump

What is charge pump, and where I can find more info about it? I mean which book?

You don't need a book with 1000 pages to understanding a charge pump.
Google to ICL7660 from Intersil. In the datasheet is a detailed discription.

Gomez

 

[Johnson]

Re: Charg Pump

Gomez, thank you very much for help.
I found it, especially App notes was really useful.
It seems that this type of regulators are useful just for small currents!
What do you suggest?

 

[funster]

Re: Charg Pump

In pll design , charge pump is switch current source.

best regards

What is charge pump, and where I can find more info about it? I mean which book?

 

[Gomez]

Re: Charg Pump

Gomez, thank you very much for help.
I found it, especially App notes was really useful.
It seems that this type of regulators are useful just for small currents!
What do you suggest?

Yes thats right. For small currents you need no choke with a charg pump. But for more current you need a boost converter (or inverter).

Gomez

 

[greenfrog]

Re: Charg Pump

What is charge pump, and where I can find more info about it? I mean which book?

charge pump is simply a circuit you can force current in or out, generally such circuit has a capacitor to be a storage of charge

 

[zeshan102]

Re: Charg Pump

Is it possible to set same charge pump current for complete bandwidth of synthesizer because i need to change the current to improve phase noise at different frequency my phase noise is diffrent when i operate my pll from 5.9 Ghz to 6.1 Ghz with same charge pump current.

Thanks & best Regards

 

[nandu_r]

Re: Charg Pump

refer this
CMOS Mixed-Signal Circuit Design by R. Jacob Baker

you can find more info on this circuits