What is an operational amplifier?
A1 “Op Amp” is an abbreviation for operational amplifier. Ideally, this is a differential amplifier with the following characteristics: • Gain: infinite • Input impedance: infinite • Output impedance: 0 • Delay from input to output: 0 By negative feedbackNote application, it can be used as an amplifier and for various types of analog signal processing (addition, subtraction, differentiation, integration, etc.). [Operational amplifier description] Represented as a triangle, comprises a total of 5 pins, as follows: + input (VN: non-inverting input => This means that the polarities of the applied input signal and the signal obtained as the output are identical), – input (VI: inverting input: This means that the polarities of the applied input signal and the signal obtained as the output are exactly the opposite (-180°)), output (VO), and power supplies (V+, V-). The most common usage example is that of an amplification circuit, as follows.
