PSpice: How to model noise with this scheme

Ivan Ivanov5

The scheme is provided in the message. The source of an alternating voltage is entered for noise creation. Thus start of modeling shows voltage a straight line (I start dc sweep with voltage step). How it is correct to simulate noise to see it on graphics? Prompt what to press in PSpice.

over 11 years ago

0 JC Zhu over 11 years ago

TI__Mastermind 37520 points

Hi Ivanov,

What type of graph do you expect to see the noise in? A DC sweep won't show you the noise, nor would the transient analysis.

You will need to run the NOISE simulation, which is a frequency sweep, which is why the AC source V2 is required. The noise in your circuit comes from the 3 resistors, not from the AC source.

Thanks,
JC

0 Ivan Ivanov5 over 11 years ago in reply to JC Zhu

Intellectual 300 points

I use a VPLUSE source from SOURCE library. I start the transient analysis, but at me only straight lines there are displayed. You won't prompt control for the analysis to see characteristic trembling because of hindrances, and what it is necessary to press to receive such characteristic? Prompt on steps. Thanks.

0 Ivan Ivanov5 over 11 years ago in reply to JC Zhu

Intellectual 300 points

According to the teacher of a harmonic source in the diagram it is enough that in analysis to receive the oscillations of the characteristic simulating noise of aimings. Whether it is possible to receive characteristic trembling in such a way and how to reason for it to the teacher? The teacher says that the noise analysis isn't necessary to me.

0 JC Zhu over 11 years ago in reply to Ivan Ivanov5

TI__Mastermind 37520 points

Ivanov,

Sorry, I still don't understand what you need. Please read a PSPICE manual such as this one: http://perso.he-arc.ch/gerald.huguenin/PSPICE_users_guide.pdf.

Thanks,
JC

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PSpice: How to model noise with this scheme