Definition: An amplifier designed for a dedicated application, optimized for specific parameters like frequency range, power output, noise level, or signal type.

Common Types:

• Instrumentation Amplifier – High precision, high input impedance, used in sensor signal conditioning.
• Operational Transconductance Amplifier (OTA) – Voltage-to-current conversion, often used in filters and oscillators.
• Audio Power Amplifier – Optimized for driving speakers (e.g., Class D for efficiency).
• RF Amplifier – Designed for radio frequencies (e.g., LNA for low-noise reception).
• Isolation Amplifier – Provides electrical isolation for safety in medical or industrial systems.

Key Features:

• Application-specific performance optimization
• May include built-in protection, filtering, or feedback networks
• Often integrated into ICs with minimal external components