Re: noise question

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