Comprehensive knowledge analysis of headphone jacks-JINBEILI ELECTRICAL

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Comprehensive knowledge analysis of headphone jacks

Nov 11,2022

　　Headphone jacks are widely used in various industries today, including computers, mobile phones, medical equipment, audio equipment, and electronics. They are necessary for headphone jacks, and different specifications of headphone jacks are also distinguished. For example, there are 2.5mm and 3.5mm headphone jacks. Let's learn more about the comprehensive knowledge analysis of headphone jacks!

　　Analysis of the Anti-Interference Function of Headphone Jacks

　　Currently, common headphone jacks usually have an automatic function to prevent mutual interference between data lines, so there is no need to worry about interference in data transmission during use. However, when installing the transmissive infrared photoelectric switch of the headphone jack side by side, please avoid interference between adjacent groups during installation. Furthermore, an effective method to prevent such interference to the headphone plug is to use a cross-setting, increasing the distance between groups when the internal data set of the jack is exceeded, changing to different frequencies, etc.

　　Analysis of Data Line Inspection and Other Issues of Headphone Jacks

　　In addition, the farther the detection distance of the data line inside the headphones, the greater the interval. The specific interval can be determined according to the adjustment status. Of course, different working frequencies can also be used. However, in general, there is also the influence of the mirror angle. When the object to be measured of the headphone plug is glossy or has a smooth metal surface, it generally shows a near-mirror effect, and the reflectivity is also high. Therefore, it is generally recommended to prevent malfunction and eliminate the influence of background objects by making the angle formed by the illuminator and the detection object of the headphone plug such that the optical axis is not perpendicular to the object to be detected.

　　Analysis of Headphone Jack Operating Modes

　　The advantage of the headphone jack operating mode is that it can run operating modes simultaneously. This means that audio files can be encoded in real time from data files, but there are two points to note. Another point to note is that if there is a slight interruption in the transmission of the data file, or if the transmission timing is slightly wrong, sound interruption and deterioration of sound quality will occur. This is one of the main reasons why USB sound processing chips are inferior in sound quality and stability compared to traditional protocol sound quality of headphone jacks.

　　These two headphone jacks are almost unsuitable for high-definition audio formats, including 24/192, and even future 32/192 audio files. Simultaneous synchronous operation modes can be performed, but the time will be more uncertain if the OS device is busy. Therefore, we should both understand and pay attention to the factors affecting the operating mode of this headphone jack.

　　Analysis of Precautions for Soldering Headphone Jacks When soldering headphone jacks, be sure to install a transistor switch circuit behind the headphone jack on the board so that the power can be turned on with a small push-button switch. The purpose is to avoid sparks when turning on the power, but at the same time, using a high-current transistor or MOS tube to operate the switching power supply, attention should also be paid to the headphone jack's working transmission. However, another precaution that should be noted for the headphone jack is that high-quality ones should be selected for soldering. When soldering, remove the oxide on the periphery of the headphone jack to be soldered, apply soldering paste, and solder quickly with a 100W soldering iron to dissolve and cool the colloid.

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