Classification of amplifiers

The amplifiers are may be classified as under,

1. According to input signal

• Small signal amplifier.
• Large signal amplifier.

2. According to coupling methods

• Inductance coupled (LC) amplifier.
• Resistance capacitance (RC) coupled amplifier.
• Transformer coupled (LC) coupled amplifier.
• Direct couple (DC) amplifier.

3. According to number of stages

• Single stage amplifier.
• Multi stage amplifier.

4. According to output

• Power amplifier.
• Voltage amplifier.

5. 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.

6. According to transistor configuration

• Common emitter (CE) amplifier.
• Common base (CB) amplifier.
• Common collector (CC) amplifier.

7. According to operating point

• Class A amplifier.
• Class B amplifier.
• Class C amplifier.
• Class AB amplifier

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