Lab3 - ECE 322L: Microelectronics Lab Lab #3: Diode...

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ECE 322L: Microelectronics Lab Lab #3: Diode Recovery Time and Clipping Circuits Objectives: Understand the concept of reverse recovery time of a diode. Also learn how to design clipping circuits using diodes. Materials: Power supply Function generator Oscilloscope Solderless breadboard Hookup wire One 100 resistor Two 1N4004 diodes One 1N4148 diode Setup: Build the circuit shown below. Build the circuit initially using a 1N4004 diode. v i (t) v o (t) i d 100 + - + -
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Background: Reverse Recovery Time: The reverse recovery time, t rr , of a diode is a measure of how quickly a diode can switch from the forward biased to the reverse biased state. This value is important in the rectification of high frequency signals. It was previously stated that a reversed biased diode will allow little current to flow. However, if the diode is strongly forward biased, then reverse biased, it will take a short time for the accumulated charge carriers to be removed from the junction region allowing the diode to shut off the current. While these charge carriers are being removed, current will flow in the reverse bias direction. The circuit built in "Setup" above will be used for the measurement of the reverse recovery
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This note was uploaded on 10/11/2011 for the course ECE 322 taught by Professor Staff during the Spring '08 term at Boise State.

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Lab3 - ECE 322L: Microelectronics Lab Lab #3: Diode...

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