The beauty of a diode lies in its voltage-dependent nonlinear resistance. The voltage ona charging and discharging capacitor through a reverse-biased diode is calculated frombasic equations and is found to be in good agreement with experimental measurements.Instead of the exponential dependence of charging and discharging voltages with time for aresistor-capacitor circuit, a linear time dependence is found when the resistor isreplaced by a reverse-biased diode. Thus, well controlled positive and negative rampvoltages are obtained from the charging and discharging diode-capacitor circuits. Thisexperiment can readily be performed in an introductory physics and electronicslaboratory.
The American Journal of Physics – American Association of Physics Teachers
Published: Jun 21, 2018
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