The Circuit Of The Smart Sensor Must Be Simple And Refined

Imagine an amplifying circuit with a 3-stage amplifying circuit and a 2-stage active filter, which amplifies the signal while also amplifying the noise. If the noise does not significantly deviate from the useful signal spectrum, no matter how the filter is filtered, the two will be amplified at the same time. The signal-to-noise ratio is not improved. Therefore, the sensor circuit must be refined and simple. If you can save one resistor or capacitor, you must remove it. This is a problem that many engineers who design sensors tend to ignore. The known situation is that the sensor circuit is troubled by the noise problem, and the circuit becomes more complicated as the circuit is modified, which becomes a strange circle.