DC plug mold internal structure analysis

　　The transistor in the DC plug mold is a control element. The role of the transistor is very large. It can be said that without the creation of the transistor, there is no such diversity in the modern information society. The tube is his predecessor, but the tube is large and consumes a lot of power. Now It has now been screened. The triode is mainly used to control the size of the current. Taking the common emitter connection as an example (the signal is input from the base, output from the collector, and the emitter is grounded), when there is a slight change in the base voltage UB, the base current IB There will also be a small change, controlled by the base current IB, the collector current IC will have a big change, the larger the base current IB, the larger the collector current IC, otherwise, the more the base current The smaller, the smaller the collector current, that is, the base current controls the change of the collector current。

The DC plug mold has a much larger change in collector current than the base current. This is the current expansion effect of the transistor. The larger the Q value of the energy storage inductance at the operating frequency, the better. Many people only notice the inductance. In fact, the influence of the Q value is much larger. The inductance only needs to meet the requirements and promises to shake in a large range. Filter capacitor. The ESR and ESL of the filter capacitor are very important parameters. The lower the better, the capacity is not enough. Of course, under the premise of meeting sufficiently low ESR and ESL, the DC plug mold protocol also has the following disadvantages. The driver is now written and included in the operating system. All manufacturers must plan products according to the standards of the agreement, which severely imprisons the engineer's thinking. Products that meet this standard often have all the similarities and short features.

　　 The biggest disadvantage of the DC plug mold is: the synchronous operation method allows the audio file to be encoded from the data file in real time. Only the transmission of the data file is slightly interrupted. Perhaps the transmission timing is slightly less severe, and there will be interruptions in the sound or the sound quality will deteriorate. This is also the most important reason why the traditional s protocol USB sound processing chip has poor sound quality and poor stability. Support for high-definition audio formats is simply crippled. For DC plug molds, regarding 24/192, and even 32/192 audio files in the future, the synchronous operation method is used, and the uncertainty of the timing will be obvious when the operating system is busy.

　　Please pay attention to AC plug mold, DC plug mold, data cable plug mold