The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl Design >> Analog Design >> Noise simulation in SAR ADCs https://designers-guide.org/forum/YaBB.pl?num=1423520442 Message started by RobG on Feb 9th, 2015, 2:20pm |
Title: Noise simulation in SAR ADCs Post by RobG on Feb 9th, 2015, 2:20pm I designing a 12 bit SAR adc and I'm wondering if there are any clever ways of simulating noise. I can evaluate the parts individually with small signal noise analysis and they seem fine, but I lose performance when I do a transient noise analysis. I am suspicious of the transient noise simulation for some reasons worth a thread of its own... Is there a way I can analyze this with pnoise, etc? I have a lot of redundancy so it is only the last few comparisons that determine the error. |
Title: Re: Noise simulation in SAR ADCs Post by sheldon on Feb 9th, 2015, 3:25pm RobG, If you are a Cadence user and can access the support site, there is a video and Rapid Adoption Kit, that discusses simulation of SARADC designs. The problem is that there are many sources of error and you need to be able to not only simulate the noise but know which noise source is limiting performance. Transient noise does not directly provide that information. Sheldon |
Title: Re: Noise simulation in SAR ADCs Post by RobG on Feb 9th, 2015, 4:15pm Thanks - I wouldn't have known about that. Yes it is cadence. I put a question on the cadence site about multithreading not threading if you know the answer to that... http://community.cadence.com/cadence_technology_forums/f/38/t/31549 |
Title: Re: Noise simulation in SAR ADCs Post by Ken Kundert on Feb 11th, 2015, 1:34pm You should be able to use a pnoise analysis. You just need to make the circuit periodic. I would thing applying a DC input and simulating a single conversion should do it. You might want to spend a little time thinking about your circuit and making sure all the noise sources would be exercised in such a test. -Ken |
The Designer's Guide Community Forum » Powered by YaBB 2.2.2! YaBB © 2000-2008. All Rights Reserved. |