Author Archives: hqt

Digital audio commonly used audio protocols are PCM, I2S, AC97. PCM is mainly used for voice communication, and the general sampling frequency is 8K. I2S is a protocol between chips, mainly between AP and codec, 3 lines commonly used by … Continue reading →

National standard wire: It is the wire that is produced in full accordance with the national standard. General household and common wires have standard specifications. The national standard specifies 5 common specifications. Metrics: Appearance standard, there must be certification mark, … Continue reading →

AC/DC switching power supply is one type of power supply. This type of power supply is also called a primary power supply-AC is alternating current, DC is direct current. After high voltage rectification and filtering, a direct current high voltage … Continue reading →