BJT에 대한 실험 보고서

소개

전자회로 (Micro Circuit)의 BJT에 대한 실험 보고서로,
BJT의 CE, CC amp 로서의 작용에 대한 실험 보고서
(Common Emitter, Common Collector)

보고서는 회로도, 실험결과, Pspice 시뮬레이션 결과가 그림의 형태로 첨부되어 있고,
그에 따른 분석이 들어 있음.

조별 실험 보고서의 하나로
10 / 10 점 획득한 보고서

목차

Lab 10.1 Common-Emitter Amplifier
Lab 10.2 Common-Collector Amplifier

본문내용

Lab 10.1 Common-Emitter Amplifier
Goal: To explore the Common-Emitter Amplifier.
Set generator to provide a sine wave at 5kHz with 0.2V peak amplitude.
Above circuit is common-emitter amplifier which I drawn with Pspice.
Analysis:
t nodes A an B, using voltage marker.
Output voltage at node B
Input voltage at node A
B with respect to amplitude and phase.
The voltage at node A is input voltage. I set the input voltage as 0.2V peak amplitude and 5kHz. Hence, as you can see, the input voltage shows 200mV peak amplitude value and the frequency is 1 / (50u * 4) = 1 / 200u = 5000 = 5kHz.
Because this circuit works as an amplifier, the output voltage’s amplitude has to be amplified. Additionally, because the voltage gain of common-emitter amplifier shows minus sign, the output voltage has to be inverted. around 180°
What is your voltage gain based on measurement and calculation?
From the measurement, the voltage gain is 4.13 / 494m = 8.36. Therefore, the measured voltage gain is -8.36.
From the calculation, the voltage gain is (Rc//RL) / (RE1 + re) = -(3.9k//3.9k) / (2 + 150+25m) = - 1.95k / 152.025 - 12.83. In the preceding equation, the capacitor’s low impedance makes short circuit, and 2 is from 1 / wc = 1 / (5k * 100u) = 1 / 0.5 = 2.
Without C2, how and why affects the voltage gain?
Output voltage at node B
Input voltage at node A

참고자료

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