Use a ferrite bead size Note: When using a ferrite ring specification process, where there is a ferrite bead impedance or impedance specification did not play a factor, it can be repeated multiple perimeter around the more impedance effect better, preferred outer diameter smartphones harness Which is good, small diameter, long length of ferrite bead specifications, such as ferrite material contains more, including the more the better. At the same time, in the long-term use ferrite bead wire harness manufacturers selling smart phone specifications, we want to know how to protect ferrite bead, because ferrite bead size relatively easily broken, this is not fake, so At the same time use a ferrite bead size to avoid the collision, resulting in the fragile ferrite bead, such as standard with a ferrite bead notch, cracks, etc., to stop, to avoid not achieve a certain degree of impedance characteristics. 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. Mechanism of action from the point of view of the common mode choke coil, the impedance greater smartphone harness factory outlets, 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 so smart phone wiring harness, as well as on an actual ring parasitic capacitance, 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. Which smartphone harness good service, electronic products factory Song Chong-wook, smartphones harness from Dongguan City, Shi Jie Xu Song electronic products factory provided. Dongguan Shijie Xu Chong-electronic products plant (chuangxs.1688.com) (www.chuangxs.1688.com) Dongguan, Guangdong, connectors leaders, over the years, the company is implementing the scientific management, innovation and development, honesty and trustworthiness policy, and satisfy customer needs. Song Chong-wook in electronic products factory leadership with the staff warmly welcome all inquiries negotiations to create electronic products factory Song Chong-wook better future.