Analog Electronics with LabVIEW®

PA.7. Discrete Input Voltage from the Circuit Board

For this measurment, we need a high-resolution output voltage source. If we are willing to give up voltage range, this can be accomplished with a simple resistor voltage divider. In the example here, the circuit forms an apporximate 100:1 divider (270- and 2.7-kΩ resistors). This provides a source with a resolution of 49 μV (bipolar). Discrete.vi will be used to investigate the discrete nature of the input channels. Open the VI and set high limit = 0.1 (with low limit = –0.1), for a receiving resolution that is also about 49 μV. Use Max Vout = 1 V (1000 mV). The output voltage sweep range ...