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OPA211: single ended to differential circuit via TINA

Wesley Huang

Expert 1030 points

Part Number: OPA211

Hi team，

When I use Tina to simulate a single ended to differential circuit mentioned in the paper, I find that the simulation results are not consistent with those mentioned in the paper. The differential mode signal is not amplified and the output is a square wave. Can you help me find out why?

Single_to_differential.TSC Single-Ended Input to different analysis.pdf

Best Regards

Wesley Huang

over 4 years ago

+1 Michael Steffes over 4 years ago

Guru 48395 points

Morning Wesley, your two V+ inputs do not have a reference voltage just the floating input signal, try putting 10kohm to ground on each V+ input.

+1 kai klaas69 over 4 years ago

Guru 140200 points

Hi Wesley,

or do it as shown in your link:

wesley_opa211.TSC

Kai

+1 Thomas Kuehl over 4 years ago in reply to kai klaas69

TI__Guru* 93105 points

Hi Wesley,

Let us know if you are still having simulation problems after applying what Michael and Kai have suggested.

Regards, Thomas

Precision Amplifiers Applications Engineering

0 Wesley Huang over 4 years ago in reply to Thomas Kuehl

Expert 1030 points

Hi Kai，

Thanks for your reply. I have solved my issue. Appreciate that!

0 Wesley Huang over 4 years ago in reply to kai klaas69

Expert 1030 points

Hi Kai，

Thanks for your reply. I have solved my issue. Appreciate that!

0 Wesley Huang over 4 years ago in reply to Michael Steffes

Expert 1030 points

Hi Michael，

Thanks for your reply. I have solved my issue. Appreciate that!