Method for connecting electronic devices and connecting cable

A method for connecting electronic devices comprising:

• providing a plurality of connection cables, each having two ends and comprising a plurality of signal lines at least one of which is capable of conveying a signal having a frequency that causes undesired radiation;
• shielding said signal lines of the plurality of connection cables between the ends thereof by first external conductors whose lengths are about co-extensive with said signal lines, respectively;
• connecting one end of each of the first external conductors to a reference potential of a first electronic device;
• bundling the other ends of said first external conductors, and shielding by a common second external conductor end portions of the bundle of the first external conductors, the length of the second external conductor being less than the length of the first external conductors and defined in terms of such frequency, the length of the second external conductor being for suppressing undesired radiation;
• and
• connecting the second external conductor to a reference potential of a second electronic device.

A method for connecting electronic devices comprising:

• providing a plurality of connection cables, each having two ends and comprising a plurality of signal lines at least one of which is capable of conveying a signal having a frequency that causes undesired radiation;
• shielding said signal lines of the plurality of connection cables between the ends thereof by first external conductors whose lengths are about co-extensive with the length of said signal lines, respectively;
• connecting one end of each of the first external conductors to a reference potential of a first electronic device, and electrically connecting the other ends of the first external conductors to each other;
• and
• shielding by a common second external conductor end portions of the other ends of the first external conductors the length of the second external conductor being less than the length of the first external conductors and defined in terms of such frequency, the length of said second external conductor for suppressing undesired radiation;
• and
• connecting the second external conductor to a reference potential of a second electronic device.

A connecting cable having at least two ends, comprising:

• a first external conductor for shielding a plurality of signal lines at least one of which is capable of conveying a signal having a frequency that causes undesired radiation, said first external conductor having a length about co-extensive with the length of said signal lines, an insulator;
• and
• a second external conductor spaced adjacent the first external conductor with said insulator between said first and second external conductors and for shielding an end portion of the first external conductor, the length of the second external conductor being less than the length of the first external conductor and defined in terms of such frequency, the length of said second external conductor being for suppressing undesired radiation;
• the first external conductor for connecting to a reference potential of a first electronic device connected by said signal line, and the second external conductor for connecting to a reference potential of a second electronic device.

A method for connecting electronic devices comprising:

• providing a plurality of connection cables, each having two ends and comprising a plurality of signal lines at least one of which is capable of conveying a signal having a frequency that causes undesired radiation;
• sheilding said signal lines of the plurality of connection cables between the ends thereof by first external conductors whose lengths are about co-extensive with said signal lines, respectively;
• connecting one end of the first external conductors to reference potentials of first electronic devices;
• bundling a plurality of the other ends of said first external conductors, and shielding by a common second external conductor end portions of the bundle of the first external conductors, the length of the second external conductor being less than the length of the first external conductors and defined in terms of such frequency, the length of the second external conductor being for suppressing undesired radiation;
• and
• connecting the second external conductor to a reference potential of a second electronic device.

A method for connecting electronic devices comprising:

• providing a plurality of connection cables, each having two ends and comprising a plurality of signal lines at least one of which is capable of conveying a signal having a frequency that causes undesired radiation;
• shielding said signal lines of the plurality of connection cables between the ends thereof by first external conductors whose length is about co-extensive with the length of said signal lines;
• connecting one end of each of the first external conductors to reference potentials of first electronic devices, and electrically connecting the other ends of the first external conductors to each other;
• and
• shielding by a common second external conductor end portions of the other ends of the first external conductors, the length of the second external conductor being less than the length of the first external conductors and defined in terms of such frequency, the length of said second external conductor being for suppressing undesired radiation;
• and
• connecting the second external conductor to a reference potential of a second electronic device.

Connecting cables, each having at least two ends, comprising:

• first external conductors for shielding a plurality of signal lines at least one of which is capable of conveying A signal having a frequency that causes undesired radiation, said first external conductors having a length about co-extensive with the length of said signal lines;
• an insulator;
• and
• a second external conductor spaced adjacent the first external conductors with said insulator between said first and second external conductors and for shielding end portions of the first external conductors, the length of the second external conductor being less than the length of the first external conductors and defined in terms of such frequency, the length of said second external conductor for suppressing undesired radiation;
• the first external conductors for connecting reference potentials of first electronic devices connected by said signal lines, and the second external conductor for connecting to a reference potential of a second electronic device.

A method for connecting electronic devices with a connecting cable, comprising:

• shielding by a first external conductor a signal line of the connecting cable from one end thereof to the other end thereof;
• connecting one end of the first external conductor to a reference potential of a first electronic device;
• shielding by a second external conductor a part of the first external conductor on the other end side such that the first and second external conductors oppose to each other only for an opposed length, the length of the second external conductor being less than the length of the first external conductor;
• and
• connecting the second external conductor to a reference potential of a second electronic device such that the reference potentials of the first and second electronic devices are coupled through a stray capacity between the first and second external conductors, and setting the opposed length between the first and second external conductors to an opposed distance needed to generate a stray capacity that can make the impedance of the first external conductor high for a low-frequency signal region and low for a high-frequency signal region so as to suppress undesired radiation from the first external conductor.

A method for connecting electronic devices with a connecting cable, comprising:

• shielding by a plurality of first external conductors a plurality of signal lines of a connecting cable from one ends thereof to the other ends thereof, respectively;
• connecting one end of each of the first external conductors to a reference potential of at least one first electronic device;
• shielding by a common second external conductor the other-end-side parts of the respective first external conductors such that the first and second external conductors oppose to each other for only an opposed length, the length of the common second external conductor being less than the length of the first external conductors;
• and
• connecting the second external conductor to a reference potential of a second electronic device such that the reference potentials of the first and second electronic devices are coupled through a stray capacity between the first and second external conductors, and setting the opposed length between the first and second external conductors to an opposed distance needed to generate a stray capacity that can make the impedance of the first external conductor high for a low-frequency signal region and low for a high-frequency signal region so as to suppress undesired radiation from the first external conductor.

A method for connecting electronic devices with a connecting cable, comprising:

• shielding by a plurality of first external conductors a plurality of signal lines of a connecting cable from one ends thereof to the other ends thereof, respectively;
• connecting one end of each of the first external conductors to a reference potential of at least one first electronic device, and electrically connecting the other end of each of the first external conductors;
• shielding by a common second external conductor the-other-end-side parts of the respective first external conductors such that the first and second external conductors oppose to each other for only an opposed length, the length of the common second external conductor being less than the length of the first external conductors;
• and
• connecting the second external conductor to a reference potential of a second electronic device such that the reference potentials of the first and second electronic devices are coupled through a stray capacity between the first and second external conductors, and setting the opposed length between the first and second external conductors to an opposed distance needed to generate a stray capacity that can make the impedance of the first external conductor high for a low-frequency signal region and low for a high-frequency signal region so as to suppress undesired radiation from the first external conductor.