Comparator

1. You will need two DC power supplies for this portion of the experiment. Get a second DC power supply from the cabinet in the back of the lab if needed.
2. Assemble the circuit in Figure using the voltage divider op-amp power supply you used in the previous sections.
3. Set voltage supply P1 to 20 volts.
4. Measure the voltage at the inverting input of the op-amp. (Note: All voltages in this section should be measured with respect to the negative terminals of power supply.)
5. Set voltage supply P2 to 0 volts initially.
6. Measure and record the output voltage .
7. While monitoring , slowly turn the voltage of P2 up until changes.
8. Record the voltage of P2 at the point at which changes.

Optional Experiment:

1. Replace P2 with the function generator set to either a triangular or sawtooth wave. Set the function generator for a frequency of 10 Hz and the maximum peak-to-peak voltage.
2. Lower the voltage on P1 so that and are 1 and -1 volts respectively.
3. Use the oscilloscope to view the output voltage.
4. Draw the waveform produced by the oscilloscope and explain it.