commoncollectorkonfiguraatiossa
Common-collector configuration, also known as the emitter follower, is a transistor amplifier arrangement in which the collector terminal is common to both the input and the output circuits. The input is applied to the base and the output is taken from the emitter. The collector is typically connected to a supply through a resistor or a load, while the emitter follows the base voltage minus the base-emitter voltage drop.
In this configuration the voltage gain is approximately unity, meaning the output voltage closely tracks the
Biasing is used to set the operating point, typically with a base bias network and an emitter
Common-collector stages are widely used for impedance matching, buffering, and driving low-impedance loads, such as headphone