The function described in (4) above is an original function that Op-Amps have. (4) Amplifies the voltage difference between the (+) and (-) input terminals. (3) High input impedance, and low output impedance amplifier. (2) The amplification factor changes by the amount of negative feedback. Op-Amps have the following major features: The name ‘operational amplifier’ is commonly abbreviated as Op-Amp. The LM358 datasheet describes it as an 8-pin dual operational amplifier, with two operational amplifier circuits included in one package. By reading both these articles, you will have a better understanding of comparators. There is an article in this issue of Short Break about building an overvoltage protection device (OVP) using an LM358 single-power operational amplifier. The LM358 operational amplifier was used for the comparator. It is a circuit that compares signal levels A and B, and operates such as if A>B, then Level = High, else level = Low. Even so, if you have done a little bit of writing in the BASIC language in the past, you might think of the “if, then, else” as a programming statement meaning 'If X is True, then do Y, else (otherwise) do Z.' Comparison circuit with a comparatorĪlthough there are differences between software and hardware, there is hardware that behaves like an “if, then, else” statement in an electronic circuit. For those who write computer programs, the 'if, then, else” statement is a piece of cake, but it may be unfamiliar to hardware engineers who build electronic circuits.

Active dipole antenna op amp