To investigate several diode applications namely clipping circuits, peak detectors, clamping circuits and voltage doublers.

To investigate several diode applications namely clipping circuits, peak detectors, clamping circuits and voltage doublers. LAB PROCEDURE Clipping circuit a. Construct the clipping circuit shown in Figure 1. Using a dual channel oscilloscope obtain the input and output waveforms. Note that the function generator in Figure 1 is set to output units of “rms” and not “pk-pk”. Make sure that both channels are synchronized in terms of the gain settings (V/Div) and zero volt reference axis. b. Construct the clipping circuit with a reference voltage source as shown in Figure 2. Obtain a screen capture of the waveforms illustrating the clipping phenomenon with the reference voltage source indicated as V2 in Figure 2. REPORT: Explain the impact of the reference voltage V2 on the output waveform. Explain why the output waveforms were as observed, using the conditions required to forward bias and to reverse bias the diodes as the basis for the explanation. University of Dayton, Department of Electrical and Engineering Department, Spring 2017 V1 3 Vrms 1kHz 0° D1 1N4148 R1 1kΩ XSC1 Agilent 0 3 1 Figure 1: Clipping circuit V1 3 Vrms 1kHz 0° V2 2 V D1 1N4148 R1 1kΩ XSC1 Agilent 3 0 1 2 Figure 2: Clipping circuit with reference voltage source Peak Detector a. Construct the peak detector circuit shown in Figure 3. The idea behind such a design is to charge the capacitor up to peak voltage of the input and to refresh it with each cycle before discharge occurs. Using a dual channel oscilloscope in the dc-coupled mode, obtain a screen capture of the input and output waveforms. Note that you may or may not have to change the capacitor value if the capacitor appears to discharge too quickly. Whatever value of capacitor you use, be sure to maintain that value for the entire exercise in this sub-section. Also please confirm the capacitance value by reading it off the body of the capacitor or double-checking with the capacitance meter. Include this information in your formal report. b. Moreover, investigate the effect of adding a load resistance across the output as shown in Figure 4. Obtain a screen capture that demonstrates such an effect with load resistances of 390Ω, 56KΩ and a 2.2MΩ and explain the changes you observe. REPORT: How can you explain the changes in the observed output waveform when adding a load? University of Dayton, Department of Electrical and Engineering Department, Spring 2017 V1 3 Vrms 1kHz 0° D1 1N4148 XSC1 Agilent C1 100nF 1 0 2 Figure 3: Peak detector circuit V1 3 Vrms 1kHz 0° R1 D1 1N4148 C1 100nF XSC1 Agilent 0 1 2 Figure 4: Peak detector circuit with load Clamping circuit a. Construct the clamping circuit as shown in Figure 5. Using a dual channel oscilloscope in the dc-coupled mode (Mode/Coupling button), obtain a screen capture of the input and output waveforms. b. Repeat (a) for the clamping circuit containing the reference voltage source shown in Figure 6. REPORT : Explain the operation of either one of the clamping circuits. University of Dayton, Department of Electrical and Engineering Department, Spring 2017 V1 3 Vrms 1kHz 0° XSC1 Agilent C1 100nF D1 1N4148 0 1 3 Figure 5: Clamping circuit V1 3 Vrms 1kHz 0° XSC1 Agilent C1 100nF D1 1N4148 V2 2 V 2 0 3 1 Figure 6: Clamping circuit with reference voltage source Voltage Doubler a. Construct the voltage doubler show in Figure 7. Note that the ‘doubler’ can be seen as a clamp cascaded/followed by a peak detector. Obtain the input and output waveforms of the voltage doubler circuit. b. Connect several different load resistors as shown in Figure 8 and obtain the corresponding screen captures. Use load resistors of 390Ω, 56KΩ and 2.2MΩ. REPORT : Explain the operation of the voltage doubler circuit. University of Dayton, Department of Electrical and Engineering Department, Spring 2017 V1 3 Vrms 1kHz 0° D1 1N4148 D2 1N4148 C1 100nF C2 100nF 2 0 XSC1 Agilent 1 3 Figure 7: Voltage Doubler V1 3 Vrms 1kHz 0° D1 R1 1N4148 D2 1N4148 C1 100nF C2 100nF 2 XSC1 Agilent 1 0 3 Figure 8: Voltage Doubler with load General notes:  A formal write up is required. Refer to the Guidelines for Writing a Formal Report and the template provided on Isidore.  Prepare a typed up report. Submit a pdf of your report on Isidore.  Include ALL simulation results and screen captures in your report. Also be sure to include answers to all items marked REPORT in the formal lab procedure above