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

a question about charge pump in pll

Status
Not open for further replies.
Z

zxasqw123

Member level 1
Joined
Apr 2, 2007
Messages
40
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,568
hi all
the amount of the reference spur ,in the 3rd order PLL is approxiantely
20log [square(2)*Icp*R*Q*Kvco/2*Fref]-20log[Fref/Fp1]
R is the res of loop fiter ,Kvco VCO gain,Fref reference frequency for PDF ,Fp1 loop fiter pole,Q is the phase offset
can anyone explain why ?
the equation refers to the paper of design of high-perfermance CMOS chargepumop in phase-locked loops
thanks in advance
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top