Common Emitter Transistor. The analogous fet circuit is the common source amplifier and the analogous tube circuit is the common cathode amplifier. The common emitter ce configuration is the most widely used transistor configuration.
The input signal is applied between the base and emitter terminals while the output signal is taken between the collector and emitter terminals. It is called the common emitter configuration because ignoring the power supply battery both the signal source and the load share the emitter lead as a common connection point shown in the figure below. In electronics a common emitter amplifier is one of three basic single stage bipolar junction transistor amplifier topologies typically used as the voltage amplifier.
The input signal is applied between the base and emitter terminals while the output signal is taken between the collector and emitter terminals.
The common emitter ce amplifiers are used when large current gain is needed. The base of the transistor used in a common emitter amplifier is biased using two resistors as a potential divider network. Input and output characteristics of common emitter configuration the graph between the variation of voltage and variation of currents when emitter of a transistor is common to both input and output circuits are known as common emitter characteristics of a transistor. Npn transistor as a simple switch.
