COMPARISON BETWEEN VOLTAGE AND POWER AMPLIFIER
sl.no Characteristics Voltage Amplifier Power Amplifier 1 Current Gain High, exceeding 100 Low 20-50 2 Collector Load High about 10KΩ Low 5-20Ω 3 Input Voltage Low, a few mV High, 2-4V 4 Collector Current Low about 1mA High exceeding 100mA 5 Power output Low High 6 Power dissipation capacity Less than 0.5W More than 0.5W 7 Output Impedence High about 10KΩ Low about 200Ω 8 Coupling Usually RC coupling Transformer or tuned circuit