For those new to the ring, many do not know what is the use ring, not to mention how to choose the size of the ring, gifted by here as we explain how to identify ring size, we carried out by Digital Caliper measuring ring, first by the outer diameter to its length, and then to its diameter, through which a few very well aware of its specifications. So we in the choice of ring size, how should choose, you should choose the better brand ring outer diameter connector, the longer length, the smaller the diameter of the ring, because the material it contains multiple line connectors, materials containing The more, the better the performance, of course, also be paired based on product performance, and what kind of product features, the choice of what the performance of the magnet. Turns select the whole bundle cable through a ferrite bead constitutes a common mode choke, if necessary, may also be in the ring on top of the cable around a few turns. The more turns, the lower frequency interference suppression, the better, the higher frequency noise while weak inhibition. In the actual project, according to the characteristics of the interference current frequency magnetic ring to adjust the number of turns. Usually when wide-band interference signals, you can set both on the cable ring, each magnetic surround different turns, so you can simultaneously suppress high frequency interference and low-frequency interference. Judging conventional connector mechanism from the common mode choke action, the greater the impedance connector, for interference suppression effect is more obvious. The common mode choke coil impedance from the common mode inductance Lcm = jwLcm, not difficult to see from the formula, the noise of a certain frequency, magnetic inductance bigger the better. But the reality is not the case, because the actual ring also parasitic capacitance, and its existence is parallel with the inductor. When faced with high frequency noise, the capacitor capacitance is small, the magnetic inductance of the short circuit, so that the common mode choke useless. Brand connectors, connectors, specialized supplied by Asahi Dongguan Shijie Chong-electronic products factory provided. Dongguan Shijie Xu Chong-electronic products plant (chuangxs.1688.com) (www.chuangxs.1688.com) strong, credible, connectors, and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Xu Song Chong electronic products factory into the brilliant and you work for a better future!