How Do I Add Voltage Noise in LTspice and Analyze Its Response?

[Matthew Carson]

Hello, I try to add a voltage noise using an arbitrary voltage source set as V=white(1).
Since I couldn't find any info about that parameter for the white() function I decided to do a .noise analysis to see how it responds to different values of that parameter.
Except I can't get any kind of my injected noise to show up in my .noise analysis.

That is two questions actually: what does that parameter mean in white(x) function?, and why can't I get my noise source to appear in the .noise analysis?
thanks

 

[Baluncore]

.NOISE analysis only analyses noise due to Johnson, shot and flicker noise. Maybe it does not include noise deliberately introduced at a source. You could ask the LTspice group at;
https://groups.yahoo.com/neo/groups/LTspice/conversations/messages

P.S. It does include noise due to the series resistance of a voltage source.

 

[Matthew Carson]

thank you. I will look them over again (I balked previously, don't want to register).

 

[Baluncore]

I will look them over again (I balked previously, don't want to register).

Give it a try. I agree it is a difficult group, these Physics forums have a much more convenient format.

I will see your question and any answers in the daily digest email.

I could ask if you want, but you are better placed to understand your needs and so can be more specific with the conversation.