Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic 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

How to simulate the noise of fully differential AMP?

Status
Not open for further replies.

winsonpku

Advanced Member level 4
Joined
Jul 7, 2005
Messages
119
Helped
6
Reputation
12
Reaction score
0
Trophy points
1,296
Activity points
2,351
Dear all:
I want to simulate the noise of fully differential AMP use hspice.someone told me that the old version can't support this function,because the noise inculdes common mode and differential mode. I didn't find much useful informatin in hspice manual,who can tell me?
Thanks all for your help!

Best Regards

winson
 

abcyin

Full Member level 4
Joined
Apr 15, 2005
Messages
237
Helped
12
Reputation
24
Reaction score
3
Trophy points
1,298
Activity points
2,855
I think it can be done by the following method:
.noise ........
Simulate.
In the .lis file, search for the total equivalent output noise voltage at the freq you are interested in. And then find the equivalent input source noise, the former devided by the later, then 20log, you get the Noise Figure.

Added after 2 minutes:

PS:
For the differential AMP,I think you should use the bidirectional Balun.
 

winsonpku

Advanced Member level 4
Joined
Jul 7, 2005
Messages
119
Helped
6
Reputation
12
Reaction score
0
Trophy points
1,296
Activity points
2,351
Thanks first,what's the meaning of "bidirectional Balun"


abcyin said:
I think it can be done by the following method:
.noise ........
Simulate.
In the .lis file, search for the total equivalent output noise voltage at the freq you are interested in. And then find the equivalent input source noise, the former devided by the later, then 20log, you get the Noise Figure.

Added after 2 minutes:

PS:
For the differential AMP,I think you should use the bidirectional Balun.
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top