Knowledge

The stability and capacity accuracy of chip capacitors correspond to the dielectric materials they use, and they are mainly divided into three categories: 1. It is a high-frequency capacitor with COG/NPO as the Class I medium. Its temperature coefficient is ±30ppm/℃, and its capacitance is very stable. It hardly changes with temperature, voltage and time. It [...]

The load capacitance refers to the sum of all the effective capacitances inside and outside the IC block connected by the two leads of the crystal oscillator, which can be regarded as the series connection capacitance of the crystal oscillator in the circuit. The different load frequency determines the different oscillation frequency of the oscillator. For [...]

The following two factors can be considered when Selection of coupling capacitor: 1. If the capacity of the coupling capacitor is too small, low-frequency signals will be severely attenuated when passing through the coupling capacitor, or even fail to pass. It is best to use a signal generator to inject a signal at the input of [...]

Organic film capacitor use organic plastic film as the medium, and metal foil or metalized film as the electrode. They are made by winding (except for laminated structure). Among them, polyester film and polypropylene film are the most widely used. There are more than a dozen kinds of organic films used in the manufacture of capacitors. [...]

Reasons that affect the capacity of film capacitors: The capacity of the film capacitor depends on the area of ​​the film metal layer, so the decrease in capacity is mainly caused by the reduction of the area of ​​the metal plating layer affected by external factors. In the capacitor manufacturing process, there is a trace of [...]