Methods and active optical cable assemblies for providing a reset signal at a peripheral end

Patent metadata

Field	Value
Publication number	US-10873402-B2
Application number	US-201916398635-A
Country	US
Kind code	B2
Filing date	Apr 30, 2019
Priority date	Apr 30, 2019
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

Methods and active optical cable assemblies for sending a reset signal from a host end of an active optical cable assembly to a peripheral end are disclosed. In one embodiment, a method of resetting a peripheral end of an active optical cable assembly wherein data contacts of a host end of the active optical cable assembly are not coupled to data contacts of the peripheral end of the active optical cable assembly includes detecting a reset signal on one or more data contacts of the host end of the active optical cable assembly. The method further includes, in response to detection of the reset signal, generating a peripheral reset signal at the peripheral end of the active optical cable assembly.

First claim

The invention claimed is:

1. An active optical cable assembly comprising:
a cable comprising a host end, a peripheral end, and one or more optical fibers between the host end and the peripheral end;
a host connector disposed at the host end of the cable and a peripheral connector disposed at the peripheral end of the cable, wherein:
each of the host connector and the peripheral connector comprises one or more low-speed data contacts, one or more high-speed data contacts, and an optical transceiver module;
the one or optical fibers are optically coupled to the optical transceiver module of the host connector and the optical transceiver module of the peripheral connector;
the optical transceiver module of each of the host connector and the peripheral connector is configured to convert electrical signals received on the respective one or more high-speed data contacts into optical signals for transmission on the one or more optical fibers, and to convert optical signals received on the one or more optical fibers into electrical signals for transmission on the respective one or more high-speed data contacts;
the one or more low-speed data contacts of the host connector are not communicatively coupled to the one or more low-speed data contacts of the peripheral connector;
the host connector further comprises a reset detect circuit that is electrically coupled to the one or more low-speed data contacts and is configured to detect a reset signal on the one or more low-speed data contacts of the host connector; and
detection of the reset signal on the one or more low-speed data contacts by the reset detect circuit causes a peripheral reset signal on the one or more low-speed data contacts of the peripheral connector.

2. The active optical cable assembly of claim 1 , wherein the reset signal is a low signal for a predetermined duration of time.

3. The active optical cable assembly of claim 1 , wherein:
the cable further comprises at least one electrical conductor;
each of the host connector and the peripheral connector comprises a power contact;
at least one electrical conductor electrically couples the power contact of the host connector and the peripheral connector;
the host connector further comprises a power switch circuit that is communicatively coupled to the reset detect circuit;
upon detection of the reset signal on the one or more low-speed data contacts of the host connector, the reset detect circuit of the host connector provides a power interrupt signal to the power switch circuit; and
upon receipt of the power interrupt signal, the power switch circuit electrically decouples the power contact of the host connector from the power contact of the peripheral connector, thereby removing voltage from the peripheral connector.

4. The active optical cable assembly of claim 1 , wherein:
the peripheral connector comprises a reset generate circuit that is communicatively coupled to the optical transceiver module and is electrically coupled to the one or more low-speed data contacts of the peripheral connector;
the reset detect circuit is communicatively coupled to the optical transceiver module of the host connector;
upon detection of the reset signal on the one or more low-speed data contacts of the host connector, the reset detect circuit of the host connector provides a reset instruction signal to the optical transceiver module of the host connector;
upon receipt of the reset instruction signal, the optical transceiver module of the host connector produces an optical reset signal on the one or more optical fibers;
upon receipt and detection of the optical reset signal by the optical transceiver module of the peripheral connector, the optical transceiver module of the peripheral connector provides a received reset signal to the reset generate circuit; and
upon receipt and detection of the received reset signal, the reset generate circuit produces the peripheral reset signal on the one or more low-speed data contacts of the peripheral connector.

5. The active optical cable assembly of claim 4 , wherein the optical reset signal comprises a plurality of optical pulses.

6. The active optical cable assembly of claim 4 , wherein:
the cable further comprises at least one electrical conductor;
each of the host connector and the peripheral connector comprises a power contact; and
the at least one electrical conductor electrically couples the power contact of the host connector and the peripheral connector.

7. The active optical cable assembly of claim 1 , wherein:
the cable further comprises at least one electrical conductor;
each of the host connector and the peripheral connector comprises a power contact; and
the at least one electrical conductor electrically couples the power contact of the host connector and the peripheral connector;
the reset detect circuit is electrically coupled to the at least one electrical conductor;
the peripheral connector comprises a reset generate circuit that is electrically coupled to the one or more low-speed data contacts of the peripheral connector and the at least one electrical conductor;
upon detection of the reset signal on the one or more low-speed data contacts of the host connector, the reset detect circuit of the host connector provides an electrical reset signal to the at least one electrical conductor; and
upon receipt and detection of the electrical reset signal by the reset generate circuit, the reset generate circuit produces the peripheral reset signal on the one or more low-speed data contacts of the peripheral connector.

8. The active optical cable assembly of claim 7 , wherein each of the reset detect circuit and the reset generate circuit is coupled to the at least one electrical conductor by at least one capacitor.

9. The active optical cable assembly of claim 7 , wherein the electrical reset signal is a plurality of electrical pulses.

10. The active optical cable assembly of claim 1 , wherein the host connector and the peripheral connector are USB connectors.

11. The active optical cable assembly of claim 1 , wherein the host connector and the peripheral connector are USB Type-C connectors.

12. The active optical cable assembly of claim 11 , wherein:
the host connector further comprises a host CC contact and a host Power Delivery controller that is communicatively coupled to the reset detect circuit and is electrically coupled to the host CC contact;
the peripheral connector further comprises a peripheral CC contact and a peripheral Power Delivery controller that is electrically coupled to the peripheral CC contact;
the cable further comprises at least one CC optical fiber that optically couples the host Power Delivery controller to the peripheral Power Delivery controller;
the peripheral connector further comprises a reset generate circuit that is communicatively coupled to the peripheral Power Delivery controller and electrically coupled to the one or more low-speed data contacts of the peripheral connector;
upon detection of the reset signal on the one or more low-speed data contacts of the host connector, the reset detect circuit of the host connector provides a reset instruction signal to the host Power Delivery controller;
upon detection of the reset instruction signal, the host Power Delivery controller produces an optical reset signal on the at least one CC optical fiber;
upon detection of the optical reset signal by the peripheral Power Delivery controller, the peripheral Power Delivery controller provides a received reset signal to the reset generate circuit; and
upon detection of the received reset signal by the reset generate circuit, the reset generate circuit produces the pe

Assignees

• Corning Res & Dev Corp

Inventors

• Giziewicz Wojciech Piotr
• Mccann Tiernan Sean

Classifications

• G02B6/4416

  Heterogeneous cables · CPC title

• H04B10/808 Primary

  Electrical power feeding of an optical transmission system · CPC title

• G06F13/382 Primary

  using universal interface adapter · CPC title

• H04B10/40

  Transceivers · CPC title

• H01B11/22

  Cables including at least one electrical conductor together with optical fibres · CPC title