Analog Electronics with LabVIEW®

P10.5. Measurement of the Amplifier Gain versus Drain Current

Procedure In Gain.vi, set VGS1 Initial to the value from the evaluation of SetVoID.vi above. The VI will sweep VGS1 over a range to include a maximum response of about 500 μA, according to the design above. Due to the high gain, the input signal voltage will be small in terms of the DAC. A subVI computes the actual output signal voltage from the value requested. The value computed is used in the gain computation. Open SetVoID.vi along with Gain.vi. Set all numbers in the Digital Controls of Gain.vi. Run the VI and adjust Vs such that Vo min and Vo max are confined between 1 and 4 ...