What is the role of chip capacitors in circuits?

The function of the chip capacitor is mainly to remove the crosstalk of various high-frequency signals generated by the chip itself to other chips, so that each chip module can work normally without interference. In the high-frequency electronic oscillation circuit, the chip capacitor and the crystal oscillator and other components together form an oscillation circuit to provide the required clock frequency for various circuits.





Chip capacitors include chip ceramic capacitors, chip tantalum capacitors, and chip aluminum electrolytic capacitors. SMD ceramic capacitors are non-polar and have a small capacity (PF grade), generally can withstand high temperature and voltage, and are often used for high-frequency filtering. Ceramic capacitors look a bit like chip resistors (so sometimes we call them "chip capacitors"), but there are no numbers on chip capacitors that represent the size of the capacitance.

SMD tantalum capacitors are characterized by long life, high temperature resistance, high accuracy, and excellent high-frequency filtering performance. It is used in small capacity low frequency filter circuits. Compared with ceramic capacitors, chip tantalum capacitors have capacitance and withstand voltage marks on the surface, and their surface colors are usually yellow and black. For example, 100-16 means the capacity is 100μF and the withstand voltage is 16V. SMD aluminum electrolytic capacitors have a larger capacity than SMD tantalum capacitors. They are more common in graphics cards, with a capacity between 300μF and 1500μF. They are mainly used to filter and stabilize current at low frequencies.