Small signal analysis on ring oscillator?

Status
Not open for further replies.
F

faizalism

Member level 4
Joined
Feb 3, 2006
Messages
78
Helped
4
Reputation
8
Reaction score
4
Trophy points
1,288
Activity points
1,850
I design three cells ring oscillator, but do not know how to simulating small signal analysis. For your information, I used delay variation by interpolation ring oscillator by Razavi. The questions are;
1. Do I need to used three cells? If I used it, where should I put the AC source?
2. How to determine the gain, because I used differential signal? is it ((out1 - out2)/(input1 - input2)) .

Thanks in advance.
 

Maybe you can simulate one cell at one time.
Is your ring osc for VCO?
 

Yes, I used ring oscillator for my VCO. What about getting the gain, my delay cell is diferential signal. Can I using this formula ((out1 - out2)/(input1 - input2)) ?
 

you can use your formula. you can simulate one cell.
 

hi

what do you mean of applying the input???!!!! the oscillator doesn't need any input.
 

Because I am simulating small signal (AC analysis). You need to add AC input, otherwise you can't simulating the small signal.
 

In hspice, save operating points into a ic, then load this ic and run ac analysis .
In spectre, do pss and pac analysis.
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…