In our daily life, various electronic products have brought great convenience to our life, work and study. Electronic products are composed of many small electronic components, and capacitors are one of the most widely used electronic components. Capacitors can be divided into many types according to their materials. Today we will take a look at what ceramic capacitors are and what are the functions of ceramic capacitors.
1.what are the ceramic capicitor?
Ceramic capacitors are also called monolithic capacitors. As the name suggests, a ceramic dielectric capacitor is a capacitor whose dielectric material is ceramic. According to the different ceramic materials, it can be divided into low-frequency ceramic capacitors and high-frequency ceramic capacitors. Classified according to the structure, it can be divided into wafer capacitors, tubular capacitors, rectangular capacitors, chip capacitors, through-core capacitors and so on.
2. the role of ceramic capacitors
Ceramic capacitors are divided into high-frequency ceramic and low-frequency ceramic. Different types of ceramic capacitors have completely different functions. Capacitors with small positive capacitance temperature coefficients are used in high-stability oscillation circuits as loop capacitors and pad capacitors. Low-frequency ceramic capacitors are limited to bypass or DC blocking in circuits with lower operating frequencies, or occasions where stability and loss are not high (including high frequency). Such capacitors are not suitable for use in pulse circuits because they are susceptible to breakdown by pulse voltage. High-frequency ceramic capacitors are suitable for high-frequency circuits.
The role of ceramic capacitors can be divided into the following categories:
1.Coupling, the ceramic capacitor used in the coupling circuit is called the coupling capacitor.
This type of capacitor circuit is widely used in the resistance-capacitance coupling amplifier and other capacitive coupling circuits to block DC and AC. It is used as a connection between two circuits. Allow AC signals to pass through and be transmitted to the next level circuit.
2.Resonance, 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.
3.Temperature compensation is to compensate for the influence of other components' insufficient adaptability to temperature and improve the stability of the circuit.
4.Tuning is the system tuning of frequency-related circuits, such as mobile phones, radios, and televisions.
5.Energy storage, energy storage is the storage of electrical energy for release when necessary. Such as camera flash, heating equipment, etc.
