ECE 320 Lab 3-UL

ECE 320 Lab 3-UL - Experiment #3 Direct-Coupled, Multistage...

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Experiment #3 Direct-Coupled, Multistage amplifier Executive Summary: The first two stage of this multistage BJT amplifier is a voltage amplifier. The first two stages are in Common Emitter configuration. The third stage is a Common Collector configuration thus only amplifies current. The voltage gain on the first stage is about 8, and the second stage is 13.27. As the third stage does not amplify any voltage, the total voltage gain is the product of the voltage gain of first and second stage which was 106.13. The voltage gain on the third stage was about 0.96. The input impedance for this three stage amplifier is pretty high, which was calculated about 6.3KΩ and the output impedance is significantly low, which was 60.2 Ω. Each of the stage was connected directly with wires. That’s why this configuration is called direct-coupled. The disadvantage of this configuration is the bias of the next stage is affected by the previous stage. Objective:
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This note was uploaded on 01/30/2012 for the course ECE ECE320 taught by Professor Mittskus during the Spring '11 term at Cal Poly Pomona.

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ECE 320 Lab 3-UL - Experiment #3 Direct-Coupled, Multistage...

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