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From: Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>
Newsgroups: sci.electronics.design
Subject: Re: noise question
Date: Tue, 16 Jul 2024 03:29:19 -0000 (UTC)
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Gerhard Hoffmann <dk4xp@arcor.de> wrote:
> Am 15.07.24 um 20:04 schrieb john larkin:
>> On Mon, 15 Jul 2024 19:33:52 +0200, Jeroen Belleman
>> <jeroen@nospam.please> wrote:
>> 
>>> On 7/15/24 18:09, john larkin wrote:
>>>> On Mon, 15 Jul 2024 17:35:08 +0200, Jeroen Belleman
>>>> <jeroen@nospam.please> wrote:
>>>> 
>>>>> On 7/15/24 16:30, john larkin wrote: 

<sniiip>

> If you want nonlinear noise, you need Keysight's Advanced Design System
> or such. Be prepared to a 5 or 6 digit price tag, depending on options.
> The keyword is harmonic balance simulator.
> 
>


Nah.  The LTspice noise() and white() functions give you time-domain noise,
with uniform or Gaussian amplitude statistics, and are good enough for many
things. 

If you want separate voltage and current noise contributions, you can use a
voltage controlled current source. 

To keep the complexity down, you need to do a little analysis to figure out
what the dominant noise sources are going to be, so that you can just model
those. 

Cheers 

Phil Hobbs 
> 
> 
> 



-- 
Dr Philip C D Hobbs  Principal Consultant  ElectroOptical Innovations LLC /
Hobbs ElectroOptics  Optics, Electro-optics, Photonics, Analog Electronics