Analog Electronics with LabVIEW®

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PC.9. Measurement of the Amplifier Gain

Component Computation

Procedure

AmpGain.vi sweeps the signal frequency over the range f_init<f_s<1000 Hz. Note that on the low end of the sweep, this is a fairly slow process. The functiongenerator VI sends several cycles at each frequency, which is, e.g., 1 sec/ cycle at f_s = 1 Hz. The amplifier voltage gain is calculated at each frequency step. This is the signal output voltage, V_o, divided by the signal input voltage, V_s. V_s is corrected for digital-to-analog error. The correction is performed by subVI, ...

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