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ECE 320 Lab 5 - UL - Experiment#5 The Frequency Response of...

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Experiment #5 The Frequency Response of the Common-Emitter Amplifier Executive Summary: The frequency response of the BJT transistor was studied in this lab. We swept the input frequency of a Common Emitter configured BJT transistor from 1 Hz to 1 MHz and analyzed the gain of the frequency. For the first step, the Lower-cutoff frequency was about 200 Hz. Below this frequency, the gain was decreasing. And the Upper-cutoff frequency was about 200 KHz. Similarly, we were observing the gain to be going down above 200 KHz. When we added a small capacitor between Base and Collector of the BJT, the upper cutoff was highly affected. The Upper-cutoff frequency was decreased to about 7 KHz. Objective: The objective of this lab experiment is to study the frequency response of a common emitter amplifier and verify the effects of circuit capacitors and the internal device capacitances of the transistor on the voltage gain of the amplifier at low, high & intermediate frequency ranges.
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