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Modeling >> Behavioral Models >> How to Generate & view 1/f noise using spectre
https://designers-guide.org/forum/YaBB.pl?num=1126940868

Message started by sphere83 on Sep 17^th, 2005, 12:07am

Title: How to Generate & view 1/f noise using spectre
Post by sphere83 on Sep 17^th, 2005, 12:07am

Hi guys,

I'm new to analog circuit design and I wish to know how to generate and view the 1/f noise spectrum of a simple nMOS transistor using Cadence spectre.

Please help & thanks in advance.

Kindest regards,

Sphere :)

Title: Re: How to Generate & view 1/f noise using spe
Post by Andrew Beckett on Sep 19^th, 2005, 8:42pm

I'm not entirely sure what you're asking here (it's a bit vague). In order to see 1/f noise, you need to have the appropriate parameters in your device models - exactly what those parameters are depends on the model type. Traditionally these were called af, ef, kf - but newer models have different parameters which can be used instead.

Apart from that it's a matter of doing a noise or sp analysis (or pnoise/psp, qpnoise/qpsp for periodic or quasi-periodic circuits) and looking at the results. Reading the manuals would probably help (Spectre user guide/reference guide and analog simulation help in cdsdoc).

Regards,

Andrew.

Title: Re: How to Generate & view 1/f noise using spe
Post by Andrew Beckett on Sep 19^th, 2005, 8:43pm

Also, since you posted this in the behavioural models section, perhaps you're asking how to do this in a behavioural model language? If so, you can use the flicker_noise() function in Verilog-A. But I suspect you just posted the question in the wrong place?

Regards,

Andrew.