Monolithic capacitors are another name for multilayer ceramic capacitors, also called multilayer capacitors. What is the function of monolithic capacitors? Divided into the following points:
1. Energy storage exchange This is the most basic function of the monolithic capacitor, which is mainly used to generate and release electrical energy through its charging and discharging process. This is mainly based on large-capacity type II monolithic capacitors, and in some cases can even replace small aluminum electrolytic capacitors and tantalum electrolytic capacitors.
2. Separating the direct current (bypass and coupling) Since the monolithic capacitor is not a conducting body, it reflects the phenomenon of electrification at both ends through the regular rotation of the AC. Therefore, it can be combined with other components in the circuit Parallel connection allows alternating current to pass, while direct current is blocked, acting as a bypass. In an AC circuit, the monolithic capacitor is charged and discharged following the change of the polarity of the input signal, so that the circuit connected to the two ends of the monolithic capacitor is in a conductive state and acts as a coupling. Generally speaking, the monolithic capacitor connected to the input of the amplifier or operational amplifier is a coupling monolithic capacitor; the monolithic capacitor connected to the emitter of the amplifier or operational amplifier is a bypass monolithic capacitor. Both are mainly type II monolithic capacitors, especially 0.1uF capacitors.
3. Frequency discrimination filtering In an AC circuit, for a multi-frequency mixed signal, we can use a monolithic capacitor to separate parts of it. Generally speaking, we can use a monolithic capacitor with a reasonable capacitance to remove most of the low-frequency signal Filtered. This is mainly based on high frequency or ultra high frequency monolithic capacitors.
4. the suppression of surge voltage Since the monolithic capacitor is an energy storage element, in the circuit, it can remove those short-term surge pulse signals, and can also absorb the excess energy generated by the voltage fluctuations in the circuit. The filtering is mainly based on high frequency products.