Filtering of film capacitors

Film capacitors are also audio capacitors, which are often used in various audio, power amplifiers, earphones, microphones, etc. In these circuits, filter capacitors are required, and axial film capacitors using polyester film can be used in the filter circuit. It is highly praised by audio manufacturers. So what role does the film capacitor play in the filter circuit? Let's take a look.

Filtering is the operation of filtering a specific band frequency in a signal, and is an effective means of suppressing and preventing interference. The filter circuit allows the signal of a certain frequency range to pass normally without loss, while preventing the signal of another frequency range from passing. This filter circuit can be used to extract useful signals. This circuit was first used in the field of communication. The reason why the film capacitor can be used in this circuit is because it can eliminate the ripple in the voltage, absorb the peak of the voltage, and eliminate the valley of the voltage in the filter circuit. It is also said above: through a certain frequency range of signals, while blocking signals in a certain frequency range.

It should be noted that when the film capacitor is used in the filter circuit, we should notice how much HZ is the ripple frequency in the filter circuit, how much mA is the ripple current, how much V is the DC voltage, and how much V is the AC voltage. To ensure that the appropriate film capacitor is selected for use in the filter circuit.