Lab 7 - Guide

# Lab 7 - Guide - UNIVERSITY OF CALIFORNIA BERKELEY EE40 for...

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UNIVERSITY OF CALIFORNIA, BERKELEY EE40: Introduction to Microelectronic Circuits Diodes Lab Guide Half-Wave Rectifier 1. Build the half-wave rectifier circuit drawn in the figure below. Use a potentiometer (as a rheostat) for the load and set it to about 1K ohm. Use a light emitting diode (LED). NOTE: To avoid damage to the diode, set the current limit to 30mA. 2. In the following set of questions, you will be measuring the threshold voltage of the diode of the circuit you built above. To do this, measure the voltage difference the input and output signal. a. Measure V T when the input is Frequency = 1KHz, V pp = 5V, Offset = 0. b. What happens when you lower V pp ? c. What happens if you use a negative offset? d. What happens to the output if you make the input Vpp = 0.5V and you increase the offset = 0.5V. e. What happens if you lower the frequency of the function generator? f. What happens as you vary the resistance on the rheostat? g. Do different color LED’s have different threshold voltages?

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Lab 7 - Guide - UNIVERSITY OF CALIFORNIA BERKELEY EE40 for...

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