TINA/Spice/OPA132: Gain/Phase Margin of System

Ryan.Bishop

Part Number: OPA132
Other Parts Discussed in Thread: TINA-TI

Tool/software: TINA-TI or Spice Models

Hello,

As opposed to measuring the gain/phase margin of a particular op amp in a circuit, is it possible to measure the gain/phase margin of the overall system in TINA?

The system in question will likely have two series Op Amps plus a FET output stage to provide programmable voltage/current output.

Can you tell me how to measure this system gain/phase margin in TINA? Or do we have documentation you could link me to?

Thanks!

Ryan B.

over 6 years ago

0 Ahana Ghosh over 6 years ago

TI__Intellectual 820 points

Hi Ryan,

Please try using the approach in the set-up shown in below image for open loop gain/phase,

0 Ryan.Bishop over 6 years ago in reply to Ahana Ghosh

TI__Expert 3900 points

Hi Ahana,

Could you provide an example with a multiple op amp circuit?

We do not need open loop gain/phase, but the closed loop gain/phase margin of two series Op Amps plus a FET output stage to provide programmable voltage/current output.

Thank you,
Ryan B.

0 JC Zhu over 6 years ago in reply to Ryan.Bishop

TI__Mastermind 30185 points

Ryan,

I'll send you a document and we can discuss further.

Thanks,
JC

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TINA/Spice/OPA132: Gain/Phase Margin of System