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university:courses:electronics:electronics-lab-32 [25 Jan 2019 13:44] – add ltspice files Antoniu Miclaus | university:courses:electronics:electronics-lab-32 [25 Jun 2020 22:07] (current) – external edit 127.0.0.1 | ||
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=====Hardware Setup:===== | =====Hardware Setup:===== | ||
- | AWG1 is connected as V< | + | AWG1 is connected as V< |
{{ : | {{ : | ||
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=====Questions: | =====Questions: | ||
- | Change the peak amplitude of the AC input waveform. What is the minimum peak value of the AC input where the PMOS transistor is still actively rectifying the input, i.e. the V< | + | Change the peak-to-peak amplitude of the AC input waveform. What is the minimum peak value of the AC input where the PMOS transistor is still actively rectifying the input, i.e. the V< |
Try different frequencies for the AC input. How does the frequency effect the peak value and the width of the current pulse in R< | Try different frequencies for the AC input. How does the frequency effect the peak value and the width of the current pulse in R< | ||
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There are other potential uses for a circuit that essentially allows current flow in only one direction with very low voltage drop across the switch. In battery chargers, where the input power source might be intermittent such as a solar panel or wind turbine generator, it is necessary to prevent the battery from discharging when the input power source is not generating a high enough voltage to charge the battery. Generally a simple Schottky diode is used for this purpose but as was pointed out in the background section this can lead to losses in efficiency. If an op amp with sufficiently low operating supply current is employed this can often be lower than the reverse leakage current in a large Schottky diode. | There are other potential uses for a circuit that essentially allows current flow in only one direction with very low voltage drop across the switch. In battery chargers, where the input power source might be intermittent such as a solar panel or wind turbine generator, it is necessary to prevent the battery from discharging when the input power source is not generating a high enough voltage to charge the battery. Generally a simple Schottky diode is used for this purpose but as was pointed out in the background section this can lead to losses in efficiency. If an op amp with sufficiently low operating supply current is employed this can often be lower than the reverse leakage current in a large Schottky diode. | ||
+ | <WRAP round download> | ||
**Resources: | **Resources: | ||
- | * Fritzing files: [[ https:// | + | * Fritzing files: [[downgit>education_tools/ |
- | * LTspice files: [[ https:// | + | * LTspice files: [[downgit>education_tools/ |
+ | </ | ||
**For Further Reading:** | **For Further Reading:** |