TINA/Spice: Phase Error

Collin McKinney

Other Parts Discussed in Thread: TINA-TI

Tool/software: TINA-TI or Spice Models

I am simulating the simplest of circuits - an RC filter. Tina Ti produces an incorrect phase measurement when using a sinewave input (as opposed to a cosine) that is off by 90 degrees. See the pictures below. The only way to obtain the correct answer (-45 degrees) is to choose the cosine waveform for VG1 instead of the sinewave. Normally, AC input signals are specified as sinewaves! Any ideas why Tina does this? The same simulation in MultiSim gives the correct answer for a sinewave input, so it would seem that it is not common to SPICE. Any ideas?

over 6 years ago

0 Herman Theodorus over 6 years ago

TI__Genius 9775 points

Hi Collin,

I guess your picture attachment does not show up somehow. Could you reattach it again?

Herman

0 Collin McKinney over 6 years ago in reply to Herman Theodorus

Prodigy 30 points

TINA Phase.docxSure, here it is!

0 Herman Theodorus over 6 years ago in reply to Collin McKinney

TI__Genius 9775 points

Hi Collin,

FYI, We're still inquiring it to TINA vendor (DesignSoft).

Herman

0 Collin McKinney over 6 years ago in reply to Herman Theodorus

Prodigy 30 points

Thanks Herman - I'll be standing by!

Collin

0 Herman Theodorus over 6 years ago in reply to Collin McKinney

TI__Genius 9775 points

Hi Collin,

Based on the designsoft reply, apparently you can keep the function generator as sinewave, but you need also to toggle the option in View -> Options -> Go to "Base Function for AC" section and switch this to "Sine" as well. Then you will be able to get that -45 degree.

Since this is very tool specific that only DesignSoft can answer, to avoid further delay and if you still have further questions, I would recommend to ask directly to DesignSoft page https://www.tina.com/ and go to Support -> Forum.

Herman

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TINA/Spice: Phase Error