Application of Chip Capacitors in Audio Circuits

The capacitor is made of a rare metal crucible. The crucible is ground into a fine powder and sintered together with other media. Tantalum capacitors have the characteristics of good stability, no change with environmental changes, large capacitance, etc. due to the inherent characteristics of metal tantalum. In some respects, ceramic capacitors have some characteristics that cannot be compared, and thus cannot be used in many ceramics. Capacitors are widely used on capacitors.

With the increasing use of tantalum capacitors in the market, the increase in model and supply, and the drop in prices, many industries today use tantalum capacitors instead of aluminum electrolytic capacitors. Of course, tantalum capacitors also have their own defects, such as high withstand voltage, which greatly limits the use of tantalum capacitors. Take audio circuits for example, audio circuits usually include capacitors such as filtering, coupling, bypass, and frequency division, and how to use capacitors more effectively in the circuit has a greater impact on the improvement of audio quality. The largest part of the coupling capacitor in the audio circuit is the tantalum capacitor used.

The principle of tantalum capacitors is this: 钽 is very easy to oxidize in the air, people use its oxide film as medium, because tantalum is very easy to oxidize, so tantalum capacitors have the function of automatic healing of wounds, so it is durable and reliable. high. Because the oxide film is very thin, the distance between the two plates of the tantalum capacitor is very close, there is little inductive reactance, very sensitive, so the charging and discharging speed is fast. These characteristics determine the use of tantalum capacitors for high-frequency, low-current, and fast-response circuits. Therefore, tantalum capacitors are also widely used in circuits that require fast response and high reliability, such as missiles and satellites. Tantalum capacitors are very sensitive and charge and discharge quickly. Therefore, they are often used in audio circuits of high-end audio systems. They are mainly high-frequency audio circuits. Since the loss of high-frequency audio and low current is reduced, the tweeters are relatively high and the audio quality is improved.