How Does VCC Affect Common Base Signal Amplification?
The Voltage Collector Collector (VCC) is an important factor in common base signal amplification. The VCC determines the power gain of the amplifier, as well as the amount of distortion and noise. Here are the three ways that VCC affects the performance of an amplifier:
Power gain
The higher the VCC, the higher the power gain of the amplifier. This is because the collector-to-emitter voltage for a typical BJT increases as the VCC increases, and the higher the collector-to-emitter voltage, the higher the power gain of the amplifier.
Distortion and noise
When the VCC is increased, the distortion and noise of the amplifier is also increased. This is because the transistor is operating at a higher voltage which results in higher current flow. The higher current flow causes more non-linearity which in turn causes more distortion and noise.
Compromises
When choosing a VCC for the amplifier, the designer must consider both the gain and the distortion and noise. Higher gains can be achieved with higher VCC, but higher VCC also increases the distortion and noise. The amplifer designer must choose a VCC that meets their needs while balancing the gains and distortion/noise levels.
In conclusion, the VCC determines the power gain, distortion and noise levels of a common base signal amplifier. Higher VCC values result in higher power gain, but also higher distortion and noise levels. Therefore, the designer must carefully weigh all factors when selecting VCC.