The Uses of ceramic capacitors, this type of capacitors are commonly used in high-frequency circuits and high-voltage circuits, temperature compensation, and high temperature stability circuits.

Bypass (decoupling)

This is to provide a low-impedance path for some components connected in parallel in the AC circuit. In electronic circuits, decoupling capacitors and bypass capacitors both play an anti-interference role. The location of the capacitor is different, and the name is different. For the same circuit, the bypass capacitor takes the high-frequency noise in the input signal as the filtering object, and filters out the high-frequency clutter carried by the previous stage. The decoupling capacitor is also called the decoupling capacitor, which is the output signal. The interference as the filtering object. We can often see that a decoupling capacitor is connected between the power supply and the ground. It has three functions: one is the energy storage capacitor of the integrated circuit; the other is to filter out the high-frequency noise generated by the device and cut it off. The path for propagation through the power supply loop; the third is to prevent the noise carried by the power supply from interfering with the circuit.


Ceramic capacitors used in coupling circuits are called coupling capacitors. This type of capacitor circuit is widely used in resistance-capacitance coupling amplifiers and other capacitive coupling circuits to block DC and AC. It serves as a connection between two circuits and allows AC The signal passes and is transmitted to the next level circuit.


The ceramic capacitor used in the filter circuit is called the filter capacitor. The filter capacitor removes the signal in a certain frequency band from the total signal. Therefore, in the power circuit, the rectifier circuit turns AC into pulsating DC, and in the rectifier circuit Then connect a larger capacity ceramic capacitor to use its charging and discharging characteristics to make the rectified pulsating DC voltage become a relatively stable DC voltage.


The safety capacitor used in the LC resonant circuit is called the resonant capacitor, and this capacitor circuit is required in both the LC parallel and series resonant circuits.

Temperature compensation

Compensate for the influence of other components’ insufficient adaptability to temperature to improve the stability of the circuit.Uses of ceramic capacitors