The amplifiers are may be classified as under,
- According to input signal
- Small signal amplifier.
- Large signal amplifier.
- According to coupling methods
- Inductance coupled (LC) amplifier.
- Resistance capacitance (RC) coupled amplifier.
- Transformer coupled (LC) coupled amplifier.
- Direct couple (DC) amplifier.
- According to number of stages
- Single stage amplifier.
- Multi stage amplifier.
- According to output
- Power amplifier.
- Voltage amplifier.
- According to frequency range
- Microwave frequency amplifier.
- Ultra high frequency (UHF) amplifier.
- Radio frequency (RF) amplifier.
- Directly coupled (D.C.) amplifier.
- Audio frequency (AF) amplifier.
- According to transistor configuration
- Common emitter (CE) amplifier.
- Common base (CB) amplifier.
- Common collector (CC) amplifier.
- According to operating point
- Class A amplifier.
- Class B amplifier.
- Class C amplifier.
- Class AB amplifier
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