10
Frequency Response of BJT Amplifiers
10.1 Introduction
The frequency response of any amplifier is defined as change in its output voltage (voltage gain) w.r.t. varying frequency of the input signal applied to it. In other words, it is the plot of the output voltage (voltage gain) versus frequency. We know that the frequency of the signal has a pronounced effect on the response of any network including amplifier having reactive components. Generally all amplifiers fall in one of the following three categories:
- RC coupled
- Transformehr coupled
- Direct coupled
10.1.1 RC Coupled
We know that the coupling capacitors C1, C2 and the emitter bypass capacitor CE of RC coupled amplifier shown in Fig. 10.1 at extremely low frequency cannot be assumed ...
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