Exam Question
List at least two factors that cause deterioration of the frequency response of a transistor amplifier. Explain how each factor affects the performance of the amplifier and the portion of the frequency range where it is effective. (16)
ETO
ETO Exam papers
📅 Sep 2025
Reference Answer
The frequency response of a transistor amplifier refers to how its voltage gain changes with signal frequency . Ideally, the gain should remain constant over the desired frequency range. However, in practice, the gain deteriorates at both low and high frequencies due to various circuit components and effects.
The two main factors that cause deterioration are:
1. Coupling and Bypass Capacitors (Affecting Low-Frequency Response):
At low frequencies (below f₁, the lower cut-off frequency) , the following capacitive components contribute to the drop in gain:
The two main factors that cause deterioration are:
1. Coupling and Bypass Capacitors (Affecting Low-Frequency Response):
At low frequencies (below f₁, the lower cut-off frequency) , the following capacitive components contribute to the drop in gain:
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