New concept of USB connection technology for automobiles (4)

Figure 2 Impedance diagram of a replaceable USB adapter

Tyco Electronics' USB connector system meets both impedance, propagation delay (time of signal transmission between two devices) and propagation delay (difference in-pair offset). In addition to these parameters, the decay rate is also one of the nominal values ​​that have a significant impact. Interconnect attenuation will cause signal distortion and affect the power design of the system.

The electronic data link must accomplish two main tasks: one is data transmission, and the other is that it does not affect the surrounding environment. Therefore, care must be taken to ensure that the wire and connector shields and the extremely low inductive interconnection between the connector and the connector shield. By shielding the performance parameters, the shielding quality of passive components such as connectors, cables and connector components can be seen. Shielding performance provides a range of parameters that can be eliminated by electromagnetic interference. The minimization of absolute radiation values ​​and the maximization of immunity to interference depend not only on the design of the connector, but also on the concept of the connection between the shielding layers. Tyco Electronics' replaceable USB adapters are fully qualified for all of the above USB high-speed data transmission systems.

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