Analog Electronics with LabVIEW®

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P11.5. Evaluation of the Gain and Signal Limits with Swept Input

Procedure

Enter the resistor values in the Digital Controls of ScanAmp.vi. The gain of interest is amplifier gain, A_v = Chan0_in/V+. This is obtained from the measured Slope of n Chan0_in versus Chan0_out and then
Opamp gain, a_vo, is calculated in a Formula Node using A_v and the ideal gain A_vNI = 1 + R_f/R₂||R₁. Thus, the gain-measurement results depend critically on the precise value of the resistors.
Run the VI and reset Chan0_out Range as necessary to obtain an output range of ...

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