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The voltage reference provided by the zener diode is

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Unformatted text preview: test of whether Q1 is functional and whether you have properly connected it into your circuit. 4. Verify the operation of your feedback network. The voltage at pin 2 of the op- amp should be equal to the zener diode voltage. If it is not, verify that the voltage ratio between VOUT and the voltage at pin 2 is what you designed. 5. Many of the op- amps in the circuits lab part bins are bad —bad devices are often put back into the parts bins. Check the DC operating voltages of the op- amp at pin 7 (which should be equal to VC) and pin 4 (which should be at ground). Note that the op- amp is powered by the unregulated full- wave rectifier circuit and is not using a negative power supply. 6. Finally, measure the DC voltages at pins 3 and 2 which should be the same and equal to the zener diode voltage. 7. At this point your components should be working and you should see the VOUT you designed for in Part A. . If you encounter any problems with the output voltage fluctuating you may have “noise” in your feedback circuit which can be fixed by a...
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