In an NPN transistor, the connection between ... The classic simple transistor AC amplifier. The classic transistor amplifier circuit then has a pair of resistors in series between supply and ...

Just as the common emitter amplifier and common base amplifier each tied those respective transistor terminals to a fixed potential and used the other two terminals as amplifier input and output ...

NPN (negative-positive-negative) transistors are the most used transistor ... transistors act as switches or amplifiers, controlling current flow based on the voltage at their base.