measurement amplifier
Measuring amplifiers amplify the smallest measuring signals of the transmitters so that they can be detected by the measuring instruments. They normalize the signals of the most diverse sensors by filtering, linearizing, adapting and amplifying them.
Through the functions of measuring amplifiers, the various transducer signals can be used in downstream amplifiers, A/D converters, measuring devices or control equipment. Since the characteristics ofmeasuring transducers are non-linear and their output voltages, application currents and application impedances are different, these output parameters are linearized and normalized via measuring amplifiers.
Important characteristics of measuring amplifiers are the output voltage range and the output current range, the zero point setting and the long-term drift, the gain factor and the filter characteristics for filtering out interference signals.
Operational amplifiers and differential amplifiers are generally used as measurement amplifiers. Measurement amplifiers also include isolation amplifiers, which separate the measurement signal from underlying DC voltage or mains voltage.