How to Determine the Type of Basic Transistor Amplifier Circuit 2

Common emitter follower amplifier circuit (emitter follower)

Common collector amplifier, also known as emitter follower, is a type of amplifier circuit with the collector as the common terminal. In this circuit, the input signal is applied between the base and collector, while the output signal is taken from the emitter and collector. The voltage gain of the common collector amplifier is close to 1, but it features high input impedance and low output impedance, making it frequently used as a buffer for impedance matching and signal transmission.

Common-base amplifier circuit Transistor 

The common-base amplifier circuit is an amplifier circuit with the base as the common terminal. In this circuit, the input signal is applied between the emitter and the base, while the output signal is taken from the collector and the base. The common-base amplifier circuit exhibits high voltage gain, low input impedance, and high output impedance. It is not commonly used for voltage amplification but performs well in high-frequency applications due to its wide bandwidth and fast response speed.

```Judgment Method```Transistor 

```Observing the common terminal (ground point): First, identify the common terminal or ground point in the circuit, as this is the most straightforward method to distinguish between the three basic amplifier circuits. In a common-emitter amplifier circuit, the emitter is grounded; in a common-collector amplifier circuit, the collector is grounded; and in a common-base amplifier circuit, the base is grounded.```.Transistor