The transistor’s base is held at a constant bias potential, its emitter forms the amplifier’s input, and the collector its output. The DC biasing arrangement is exactly the same as the common ...

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 ...

My guess is that it has a higher input resistance due to its small SO-23 package—all others were TO-92 devices. This graph ... output signal (double). The impedance of the 8Ω loudspeaker working into ...