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# lab2 - University of California San Diego Department of...

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University of California, San Diego Department of Electrical and Computer Engineering ECE65, Fall 2009 Lab 2, Diode wave-form shaping circuits In these experiments we examine diode circuits that modify the input wave-form. In these cases (and in many future experiments) you are asked to print out scope traces of input and output voltages of the circuit. You should follow this procedure: 1) Attach Scope channel 1 to v i and Scope Channel 2 to v o . 2) Move the two traces such that the zero voltage value for both channels are in the middle of the display. 3) Expand the time selection so that only 2 to 3 periods of the wave-form are shown. 4) Adjust the volt per division knob such that the signal is as large as possible ( i.e., fills the display). Ensure that both channels have the same volt per division setting. 5) Printout the trace. In this manner v o and v i can be directly compared. Experiment 1: Rectifier & Peak Detector Circuit Consider the circuit below with a 1N4148 general purpose diode and R = 1 kΩ.

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