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How to simulate quantization noise in ADC (Read 4019 times)

paulcktang New Member Offline Posts: 6	How to simulate quantization noise in ADC Apr 28^th, 2007, 4:15pm I am working on simulating the noise of a quantizer. I want to know how to simulate the quantization noise and circuit noise by Cadence Spectre? thanks at all!
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sheldon

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Posts: 751

Re: How to simulate quantization noise in ADC
Reply #1 - Apr 29^th, 2007, 3:31am

Paul,

It would be good to start by reviewing some of the previous threads on
the topic,

http://www.designers-guide.org/Forum/YaBB.pl?num=1102800907

If you setup the simulation correctly, then the effect of quantitazation
noise will be included in the simulation and will limit the noise floor at
the output of the ADC.

Simulating circuit noise is a more difficult problem, using Spectre you
can at least simulate the effect of jitter by using a noisy clock generator,
you will need to create it using verilog-A.

Best Regards,

Sheldon

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paulcktang

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Posts: 6

Re: How to simulate quantization noise in ADC
Reply #2 - Apr 29^th, 2007, 10:52pm

Thanks! I read the previous thread but I still don't know the detial on how to setup the simulation of quantization noise in Spectre?

Do you think PNOISE analysis will be useful?

Or I have to compute the quantization error in time domain and then use FFT to compute the quantizaton noise spectrum?

Thanks,
Paul

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Ken Kundert Global Moderator Offline Posts: 2386 Silicon Valley	Re: How to simulate quantization noise in ADC Reply #3 - Apr 29^th, 2007, 11:32pm Quantization noise is a large signal phenomenon. You will need to use a transient analysis and an FFT. -Ken
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