3.List at least two factors that cause a 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)
Reference Answer
### Introduction to Amplifier Frequency Response The frequency response of an amplifier is a measure of its ability to amplify signals of different frequencies equally. Ideally, an amplifier should have a constant gain over a wide range of frequencies. However, in practice, the gain of an amplifier varies with the signal frequency. The range of frequencies over which the gain is relatively constant is known as the **bandwidth**. The deterioration of frequency response, meaning the drop in gain at very low and very high frequencies, is caused by reactive components (capacitors and inductors, both intentional and parasitic) within the amplifier circuit. The two primary factors causing this deterioration are: 1. **Circuit Capacitances (Coupling and Bypass Capacitors)**, which affect the low-frequency response.
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