PSPICE-FOR-TI: Noise analysis

Ryuuichi machida

Part Number: PSPICE-FOR-TI

Hello,

I would like you to ask whether I have something wrong in attached project file to analize noise.
When I perform simulation, I observed just 0V as output noise.（I expected that I can confirm thermal noise due to resistor in this model)

Could you please confirm whether there is wrong setting in attached file ?
And also, if my setting available, could you please tell me why output result is arround 0V ?

BR,
Noise_simulation-2022-05-19T04-31.zip

over 1 year ago

0 Jerry Madalvanos over 1 year ago

TI__Mastermind 22581 points

Hey Ryuuichi-san,

First, if you want to simulate noise at different temperatures, go to Simulation Settings and click "Temperature (Sweep)" text (not the check box) and it will take you to the following menu.

Add the temperatures you wish to simulate at.

Next, you are seeing zero output because the voltage marker being used is Vout. Delete the marker on Vout and follow the below instructions

Run the simulation, and when the blank plot is displayed, select Trace > Add Trace
Deselect "Power" and "Alias Names" so only "Noise", "Analog", "Voltages", "Currents" are selected.
Select the desired noise trace and repeat steps for additional traces.

Best,
Jerry

0 Ryuuichi machida over 1 year ago in reply to Jerry Madalvanos

Guru 11515 points

Hello Jerry-san,

Thank you for your reply.
I performed simulation following by your advise.
However, output show same result (even though I use temp sweep) (means output show "0"V)

Can you observe expected result on your environment ?

BR,

0 Jerry Madalvanos over 1 year ago in reply to Ryuuichi machida

TI__Mastermind 22581 points

Ryuuichi-san,

Does it show 0V when you select the noise traces as described above?

The voltage marker will show 0V, but the noise traces will show the correct value.

Best,
Jerry

0 Ryuuichi machida over 1 year ago in reply to Jerry Madalvanos

Guru 11515 points

Hello Jerry-san,

Thank you for your reply.
Understood. I saw output noise by choosing "V(ONOISE)". At first, I thought that I can see output noise just putting voltage marker same as LTSpice.

BTW, where can I get user's guide for Pspice for TI ?

BR,

+1 Jerry Madalvanos over 1 year ago in reply to Ryuuichi machida

TI__Mastermind 22581 points

Ryuuichi-san,

https://training.ti.com/pspice-ti-introduction Currently these are the videos provided. However these do not cover noise analysis.

Art Kay has also created a slide deck covering some additional topics which does include noise analysis. Art_Kay_pspice_for_TI_2-22-2022.pptx

Best,
Jerry

0 Ryuuichi machida over 1 year ago in reply to Jerry Madalvanos

Guru 11515 points

Hello Jerry-san,

Understood.

BR,

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PSPICE-FOR-TI: Noise analysis