What is the role of operational amplifiers?
A1 Elements in our environment such as wind, light, sound, temperature, and humidity change quantitatively on a continual basis. In other words, they are analog values. On the other hand, the processing executed in most devices we use these days is digital. Some form of analog signal processing is therefore required to handle the analog values input to these devices. This analog signal processing is mainly carried out by operational amplifiers. Let’s use a concrete example of analog signal processing wherein the land surface temperature is measured at regular intervals and recorded by a device. First, the land surface temperature is converted into a voltage using a temperature sensor (this is also an analog value). If this voltage is extremely small, there is the risk that the fluctuations cannot be observed, so the voltage must be amplified.
