What are the common types of amplifiers used in instrumentation?

Common instrumentation amplifiers: Operational amplifier (op-amp) - versatile building block for gain, filtering, and signal processing. Instrumentation amplifier - differential amplifier with high CMRR, high input impedance, ideal for sensor interfaces. Isolation amplifier - provides galvanic isolation between input and output. Buffer amplifier - unity gain, high input impedance for impedance matching. Each type serves specific purposes in signal conditioning, with selection based on required gain, bandwidth, noise, and input characteristics.