LabVIEW Computations

Components

Same as SetVSD.vi

SubVI’s

SetVSD.vi (Set Bias)

FG1Chan.vi (Function Generator)

SR.vi (Send-Receive Function)

Oscilloscope.vi (Chan1_in Read Waveform)

Procedure

• Sub VI FG1Chan.vi sends out the bias VSG and, in series, a sine-wave signal equal to V_SG/20. Set VSGinit as determined with SetVSD.vi as the VSG required to obtain I_D ≈ 500 μA. This is the initial VSG in the sweep of the next part. Run the VI to obtain the gain for this bias current. Obtain a data log of the Front Panel. Default and save. Re-run with a new VSGnew = VSG – 0.5 V to obtain the gain at a lower bias current. Obtain a data log.