Emitter follower features
The emitter follower is also a common collector amplifier circuit, which is a widely used circuit. Its main function is to amplify the alternating current to improve the load capacity of the entire amplifying circuit. In actual circuits, it is generally used as an output stage or isolation stage.
It is characterized by high input impedance and low output impedance, so the current obtained from the signal source is small and the load capacity is strong, so it is often used in the input stage and output stage of multi-stage amplifier circuits; it can also be used to connect two circuits to reduce directness between circuits The impact of the connection serves as a buffer.