Abstract: A differential amplifier is a basic building block for analog integrated circuit design; the operational amplifier integrated circuit has wide applications in signal processing. In this ...

Abstract: Operational amplifiers are an integral part of an electronic system. Typical uses of the operational amplifier are amplifiers, oscillators, filters and also used in many types of ...

A short description of the lock-in technique gives an idea of the working principle of these useful devices, that are spreadly used in weak signals detection, but rarely treated in introductory ...