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What Is The Role Of CBB Capacitors In The Circuit?

Dongguan Weiqing Electronics Co.,Ltd | Updated: Feb 10, 2019
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Many people may not know much about what CBB capacitors are. After all, they are not common in life. In fact, it is not right. CBB capacitors can be said to be everywhere in our lives, just because CBB capacitors are too small to be inconspicuous. CBB capacitors are often used in signal circuits. The emitter of a transistor amplifier has a self-biasing resistor. At the same time, the voltage drop of the signal reacts to the input to form the input-output signal coupling. This resistor is the component that generates the coupling. A capacitor is connected in parallel across the resistor. Because the CBB capacitor of the proper capacity has a small impedance to the AC signal, the coupling effect of the resistor is reduced. Therefore, the capacitor is called a decoupling capacitor.

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The CBB capacitor is actually a polypropylene capacitor, which is a capacitor in which a metal foil is used as an electrode, and a polypropylene film is stacked from both ends and then wound into a cylindrical structure. Non-polar, high insulation resistance, excellent frequency characteristics (wide frequency response), and low dielectric loss. It is widely used in resonant circuits, bypass circuits, and high-frequency high-voltage circuits. CBB capacitors should stop running immediately if they are defective, or they will have serious consequences.


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