Instrumentation amplifiers are specialized electronic devices designed to amplify small differential signals while rejecting large common-mode voltages. They are commonly used in applications where precise measurements are required, such as in medical devices and sensor signal processing. Their high input impedance ensures minimal loading on the signal source, making them ideal for sensitive applications. These amplifiers typically consist of three operational amplifiers (op-amps) configured to provide high gain and excellent linearity. The design allows for easy adjustment of gain through external resistors, making them versatile for various applications. Their stability and accuracy make them essential in fields like biomedical engineering and industrial automation.