Cable

Abstract

A cable includes a cable part including at least one set of signal cables for differential transmission, a ground cable, and a power cable, and a first connector and a second connector arranged at both ends of the cable part. At least one of the first connector and the second connector has a common-mode choke coil connected to the ground cable and the power cable.

1 . A cable comprising:
 a cable part including at least one set of signal cables for differential transmission, a ground cable, and a power cable; and   a first connector and a second connector arranged at both ends of the cable part,   wherein at least one of the first connector and the second connector has a common-mode choke coil connected to the ground cable and the power cable.   
     
     
         2 . The cable according to  claim 1 , wherein the common-mode choke coil is effective in noise removal not only in a common mode but also in a differential mode. 
     
     
         3 . The cable according to  claim 1 , wherein a connector having the common-mode choke coil further has a condenser for noise removal which is placed between the ground cable and the power cable. 
     
     
         4 . The cable according to  claim 1 , wherein a connector having the common-mode choke coil further has a substrate having the common-mode choke coil mounted thereon and an insulating resin layer covering the substrate. 
     
     
         5 . The cable according to  claim 4 , wherein the connector having the common-mode choke coil further has an electromagnetic wave shielding layer covering the insulating resin layer. 
     
     
         6 . The cable according to  claim 5 , wherein the electromagnetic wave shielding layer contains carbon or ferrite. 
     
     
         7 . The cable according to  claim 5 , wherein the one set of signal cables is installed such that the one set of signal cables does not come into contact with the electromagnetic wave shielding layer. 
     
     
         8 . The cable according to  claim 7 , wherein, on a side of the connector having the electromagnetic wave shielding layer, one end of the one set of signal cables is shorter than one end of the ground cable and the power cable. 
     
     
         9 . The cable according to  claim 5 , wherein, on a side of the connector having the electromagnetic wave shielding layer, one end of the one set of signal cables is covered with an insulating covering material. 
     
     
         10 . The cable according to  claim 1 , wherein one of the first connector and the second connector has the common-mode choke coil connected to the ground cable and the power cable, and the other of them has a ferrite bead arranged in the ground cable and the power cable. 
     
     
         11 . The cable according to  claim 1 , wherein at least one of the first connector and the second connector further has a common-mode choke coil connected to the one set of signal cables.