Application of Field Effect Transistor

Buffer

• Main Advantage: High Zin and Low Zout
• Uses: General Purpose measuring equipment, receivers.

RF Amplifier

• Main Advantage: Low Noise
• Uses: FM Tuners, Communication Equipment

RF Mixers

• Main Advantage: Low Distortion
• Uses: FM and TV receivers, Communication Equipment

AGC Amplifier (Ohmic)

• Main Advantage: Ease of Gain Control
• Uses: Receivers, Signal Generators

Cascade Amplifier (Active)

• Main Advantage: Low Input Capacitance
• Uses: Measuring Instruments, Testing Equipment

Chopper Amplifier

• Main Advantage: No Drift
• Uses: DC Amplifiers, Guidance Control Systems

Variable Resistor (Ohmic)

• Main Advantage: Voltage Controlled
• Uses: Op-amps, Organ tone controls

Audio amplifier

• Main Advantage: Small Coupling Capacitors
• Uses: Hearing Aids, Inductance Transducers

RF Oscillators

• Main Advantage: Minimum Frequency Drift
• Uses: Frequency Standards, Receivers

Reference

Albert Malvino and David J Bates, “Electronic Principles”, 7th Edition, TATA McGRAW HILL.