Apparatus and Method of Charge Induction for Cable to System Testing
AssigneeInternational Business Machines Corporation
InventorDon Alan Gilliland
Life of this patent
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Abstract
The present invention is directed to an apparatus that minimizes the effects of hand capacitance on a cable, the apparatus also being configured to generate and induce a charge, wherein the charge couples a capacitance to the cable, the capacitance matching a typical capacitance that a hand couples to a cable. The present invention is also generally directed to a method of performing a cable to electronic system electrostatic discharge immunity test.
Claims20
An cable shielding apparatus comprising:
- an electrically non conductive exterior layer, an electrically non conductive internal layer, a electrically conductive capacitance shielding layer at ground potential separating the exterior layer and the internal layer, a electrically conductive conduit layer connected to a electrode, the electrode configured to selectively transfer an electrical charge to the electrically conductive conduit layer.
An discharge immunity test apparatus comprising:
- a base comprising an electrical non conductive exterior layer, an electrical non conductive internal layer having a conduit being substantially lined with a conductive gasket, the conductive gasket being configured to at least accept a portion of the cable, and an electrically conductive shielding layer separating the internal and exterior non conductive layers, the shielding layer surrounding at least a portion of the cable;
- a cover comprising an electrical non conductive exterior layer, an electrical non conductive internal layer having a conduit being substantially lined with a conductive gasket, the conductive gasket being configured to at least accept a portion of the cable, and an electrically conductive shielding layer separating the internal and exterior non conductive layers, the shielding layer surrounding at least a portion of the cable;
- means for passing an electrical charge to the conductive gasket of either the base or the cover, and;
- wherein the shielding layer of the base contacts the shielding layer of the cover, and wherein the conductive gasket of the base contacts the conductive gasket of the cover.
A method of performing a cable to electronic system electrostatic discharge immunity test comprising:
- placing a shielding apparatus configured to shield the cable from hand capacitance about the cable;
- inducing an electrical charge to the cable, and;
- inserting the cable to the electronic system.
Dependencies are inferred from the claim text.