Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Power supplies and grounds [hlp]

Status
Not open for further replies.
N

No one

Full Member level 5
Joined
May 11, 2005
Messages
287
Helped
4
Reputation
8
Reaction score
2
Trophy points
1,298
Activity points
3,425
Hello Everyone;
Suppose that in a RF circuit, we want to produce 2 different frequencies with two PLLs. How about the power supplies and grounds of the PLLs? Most they be isolated for two PLLs?
 

the ground maybe common , but u need to filter the supply to each VCO and also for the charge pump , decoupling capacitors are needed , with different vaules also u may need some coils to increase the RF impedance of these tarces

khouly
 

    N

    No one

    Points: 2
    Helpful Answer Positive Rating
Hello khouly;
you wrote:
with different vaules also u may need some coils to increase the RF impedance of these tarces
Click to expand...
Where the coils should be placed? Between power supplies of PLLs?
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top