What Does Low-Pass Filter Mean?
Opposite in nature to a high-pass filter, a low-pass filter is a filter that allows signals with a frequency lower than the cut-off frequency (the frequency at which the output voltage is 70.7% of the source voltage) to pass through it. It also attenuates those signals whose frequency is higher than the cut-off frequency. In other words, low-pass filters help in removing short-term fluctuations, and provide a smoother form of signal.
Techopedia Explains Low-Pass Filter
In electronics, a low-pass filter is basically implemented in two ways: inductive low-pass filter and capacitive low-pass filter. The difference between the two lies in the way the components are arranged. In inductive low-pass filters, the inductors are inserted in series with the load, whereas in capacitive low-pass filters, the resistors are inserted in series and a capacitor is inserted in parallel to the load.
