Filtered connector/adaptor for unshielded twisted pair wiring
AssigneeTandem Computers Incorporated
InventorAlston C. Moore, Jr.
Life of this patent
Estimating the term…
Abstract
Twisted wire pairs are used to interconnect units of a data processing system with connectors that incorporate electromagnetic interference suppression devices in the form of common mode ferrite choke.
Claims13
A connector for coupling an electronic apparatus, to unshielded wiring, the electronic apparatus being of a type that can incidentally produce electromagnetic interference (EMI ) that may be communicated to the unshielded wiring to which the electronic apparatus is coupled, the connector comprising:
- a non-metallic housing;
- first means mounted in the housing for connecting the connector to the electronic apparatus;
- second means mounted in the housing for connecting the connector to the unshielded wiring;
- connector wiring for electrically communicating said first and second means to one another;
- and
- suppression means associated with the connector wiring forming a common mode filter to attenuate common mode EMI radiation resulting from communication of the incidental EMI to the connector wiring from the electrical apparatus.
A connector for attenuating electromagnetic interference from an electronic unit coupled to a remote unit by at least unshielded interconnect wiring that communicates electrical signals between the electronic unit and the remote unit, the electronic unit having a first connector part for attachment to the connector, and the unshielded wiring having a second connector part for attachment to the connector, the connector comprising:
- a housing;
- mating third and fourth connector parts mounted in the housing for connection to the first and second connector parts, respectively;
- electrical wiring coupled to communicate the electrical signals between the mating third and fourth connector parts;
- and
- common mode choke means formed on the electrical wiring to attenuate the electromagnetic interference radiation communicated to the electrical wiring from the electronic unit.
A connector for attenuating electromagnetic interference from an electronic unit coupled to a remote unit by at least unshielded interconnect wiring that communicates electrical signals between the electronic unit and the remote unit, the electronic unit having a first connector part for attachment to the connector, and the unshielded wiring having a second connector part for attachment to the connector, the connector comprising:
- a housing;
- mating third and fourth connector parts mounted in the housing for connection to the first and second connector parts, respectively;
- electrical wiring, including a plurality of individual electrical wires, coupled to communicate the electrical signals between the mating third and fourth connector parts;
- common mode choke means formed on the electrical wiring to attenuate the electromagnetic interference radiation communicated to the electrical wiring from the electronic unit, the electrical wiring being passed through the toroidal-shaped ferrite at least twice so that the electrical wiring is looped about the toroidal-shaped ferrite;
- and
- capacitive means coupling each one of the plurality of electrical wires to an electrical common.
Dependencies are inferred from the claim text.