Analog Electronics with LabVIEW®

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P9.4. Amplifier Gain Measurement

Procedure

Gain.vi runs DC.vi to set up the bias and balance the circuit. It then sends out a signal squarewave and reads the response at the two outputs. Gain is calculated as output voltage divided by V_s/2. The 1/2 accounts for the voltage divider of the two gate resistors.
Set in Chan0_out (V_DD), which you selected above in Parameters.vi. Run Gain.vi to obtain the gain at the two outputs. Adjust Vs for an output voltage magnitude similar to that in the example.
Now run AvgGain.vi with your V_DD (Chan0_out) ...

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