| 摘要 |
Methods and apparatus for reducing the electromagnetic interference (EMI). The present invention is aimed at the reduction of the electric current flowing on the external surface of shields of cables made by a combination of shielded cables. In one embodiment the cable shields are electrically connected with each other in one or a plurality of positions along the cable, in order to reduce the current flowing on the cable shields, and a conducting connection externally, to the jacket is provided, in order to connect an EMI filter. In a different embodiment the cable jacket is partially removed, in order to provide an electrical connection between all the shields and an external EMI filter. In a different embodiment the cable comprises quarter-wavelength sleeve chokes in order to reduce the shield common mode current at some particular frequencies. |
