TINA/Spice/TINA-TI: The question between FilterPro and TINA-TI

Part Number: TINA-TI

Tool/software: TINA-TI or Spice Models

Hi,

I try to rebuild FilterPro filter in TINA-TI.

Case 1. Lowpass, Multiple Feedback, Butterworth, order 2, Gain: 1V/V, Frequency:10Hz

The input signal and output signal inversed.(-1V/V)

The frequency response is different too.

DPG3.TSC

Case 2. Lowpass, Shallen Key, Butterworth, order 2, Gain: 1V/V, Frequency:10Hz

The frequency response looks like different.

DPG2.TSC

I don't know where the problem is.

I would appreciate any help.

YHH

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