How to simulate the osc/VCO ac response?

Status
Not open for further replies.
H

huanchou

Member level 2
Joined
Aug 23, 2004
Messages
43
Helped
3
Reputation
6
Reaction score
1
Trophy points
1,288
Activity points
396
vco ac

Dear all :

I want to simulate the VCO(the delay cell is fully differential type) ac response, but I don't have any idea to do that.
Can I use the method of the fully differential op to do the simulation?
Where can I find the fully differential op simulation method?
 

pss and pac of spectre
 

    H

    huanchou

    Points: 2
    Helpful Answer Positive Rating
If I want to use the HSPICE to do the simulation, how to setup the circuit and command?
 

Used feeback theory. You can break the loop and add a testing voltage source and then see the feedback output response for gain and phase. Then check the gain as if bigger than 1 at wanted frequency. If it is, then the circuit is without startup problem.

Yibin.
 

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…