What are the characteristics of a common emitter amplifier?

The common emitter (CE) amplifier has the emitter terminal common to both input and output circuits. It provides high voltage gain (typically 100-500), moderate current gain, 180-degree phase inversion between input and output, medium input impedance (1-5 kohm), and medium output impedance. It is the most widely used BJT amplifier configuration for general-purpose voltage amplification.