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.

How to simulate phase noise of PFD?

Status
Not open for further replies.

butterfish

Full Member level 2
Joined
Oct 26, 2005
Messages
135
Helped
9
Reputation
18
Reaction score
3
Trophy points
1,298
Location
china
Activity points
2,012
Hi, all
Now I 'm design a APLL and I want to optimize bandwidth for minimize phase noise, the phase noise of PFD and VCO are necessary.
but the output of PFD&charge pump is a discrete singnal, how to simulate the phase noise of PFD and charge pump in Hspice?
thanks in advance!
 

halo, butterfish..
i also doing PLL project currently. so far i understood about phase noise is the output of the PFD at the certain frequency offset. i m not familiar with Hspice simulation, but in mentor graphic, there is a noise simulation in analysis part. maybe u can have a try.
 

Hi, trayant,
Thanks for reply!
But I dont have mentor graghic.
Do you have any paper about PDF/VCO phase noise estimate?
 

haha, when i reply ur msg, i start to ask myself about the phase noise simulation in mentor graphic.

because i also havent tried out this before. can you wait for few day? when i go lab only can try to do the noise simulation.

i read the book from B.Razavi. Phase noise of VCO is higher than PFD. really sorry, lab close on weekend.

i had just done my PFD with dead zone elimination architecture with input frequenc 100MHz only. if i try out more simulation, we can have some discussion.

i also a new guy to IC design and PLL.
 

    butterfish

    Points: 2
    Helpful Answer Positive Rating
trayant said:
but in mentor graphic, there is a noise simulation in analysis part.

What is the name of the tool that you are using ? Is it Eldo/Eldo RF or it is another tool ?
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top