Lab 6-Experiment 20

# Lab 6-Experiment 20 - Randall Robert Sec 05 Lab#20 Current...

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Randall Robert Sec 05 Lab #20 Current Mirrors and Active Loads 11/03/2004 Lab Partner: Jason McAllister

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Procedure: Follow the procedure given in the lab manual on page 86. 1. Connect the circuit in figure 1: Vary the positive supply voltage, and plot the output voltage as a function of the supply voltage. X Y 0.55 1.1 1.65 2.2 2.75 3.3 3.85 4.4 4.95 5.5 6.05 6.6 7.15 7.7 8.25 8.8 9.35 9.9 10.45 11 -1.8 -1.35 -0.9 -0.45 0.45 0.9 1.35 1.8 2.25 2.7 3.15 3.6 4.05 4.5 4.95 5.4 5.85 6.3 6.75 0 O/P Voltage (volts) O/P Voltage vs. Supply Voltage Supply Voltage (volts) Table: 10 items Supply Voltage O/P Voltage 1.1 -1.4 2 -1 3.2 -0.4 4 -0.03 5.1 1 6.1 2 7.1 2.95 8.1 4 9.1 4.8 10.2 6
To the extent that the collector current is fixed, the slope of this graph should be exactly 45 degrees. Is this true? ٠ Yes, the slope is extremely close to 45°, although it has some slight abnormalities. At what supply voltage does the graph abruptly change? ٠ The voltage changes abruptly when the supply voltage is around 4.1v due the fact that the transistor is no longer operating in the constant current region.

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## This note was uploaded on 02/21/2012 for the course EE 3232 taught by Professor Feldman during the Fall '10 term at LSU.

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Lab 6-Experiment 20 - Randall Robert Sec 05 Lab#20 Current...

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