An amplifier is an electronic device that increases the strength of a signal. A precision operational amplifier (op-amp) is a type of amplifier that is specifically designed for high-precision, low-noise applications. Precision op-amps are commonly used in scientific and medical instrumentation, as well as in other systems that require high-accuracy amplification of small signals.
Precision op-amps are designed to provide high levels of gain with low levels of noise and distortion. They are typically more expensive and have more complex designs than other types of amplifiers, but they are able to provide superior performance in applications that require high precision and accuracy.