Introduction
The notch coil is part of the filter, the filter is composed of a coil and a capacitor, and the medium and short waves of the radio acquire radio waves of the corresponding frequency in the air through resonance, and hear the sound after demodulation through the filter.
Scope of application
The function of the notch coil is to reduce the noise in the signal, filter out the carrier signal of interest, improve the reception sensitivity and obtain a higher signal-to-noise ratio.
Product Features
A notch coil is applied in antenna engineering, which can automatically extend or shorten the length of the antenna according to the frequency of the signal. A filter in radio receivers is dedicated to eliminating certain unwanted signals to reduce interference with useful signals.
It is used in the circuit to filter out unwanted frequency signals, such as adding a notch coil at the edge of the band-pass filter passband, usually, a parallel resonant loop in series, or a series circuit in parallel, their resonant frequency is the frequency to be filtered, which is very common in the frequency part of the TV circuit.
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