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Electro-optical communication link

A technology of electro-optical links and communication links, which is applied in the field of computer interconnection and can solve the problems of providing electrical isolation

Active Publication Date: 2016-09-07
TERADYNE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrical specification limits the interconnect length to approximately 15 meters and does not provide the electrical isolation between the host controller and target device that may be required in some applications

Method used

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  • Electro-optical communication link
  • Electro-optical communication link
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Experimental program
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Embodiment Construction

[0013] figure 1 The system shown includes a PCIe host computer (PCIe host) 10 connected to a PCIe peripheral device (PCIe device) 12 via a communication link (link) 14 . The communication link 14 includes PCIe electrical components as well as optical components, which together form an "electro-optical link", which will be discussed in detail below.

[0014] A general description of certain operational aspects of PCIe (according to applicable standards or specifications) is now provided in order to provide important background information for further description of embodiments of the present invention. This description will be combined below figure 2 keep going.

[0015] PCIe, the next-generation, nonproprietary personal computer (PC) peripheral component interconnect system, has a fairly extensive set of power-down (or sleep) modes that are part of the Advanced Configuration and Power Interface (ACPI) specification. ACPI is an open standard, suitable for unified device con...

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Abstract

The present invention provides a communication link for carrying data between a transmitter and a receiver, the communication link operating according to a communication protocol, such as PCI Express (PCIe), which specifies a reduced power link An operating state in which the transmitter generates a damped electrical output signal and the receiver operates in an energy saving mode. The communication link includes an electro-optical link and circuitry coupling an output of the transmitter to an electrical input of the electro-optical link. The circuitry is configured to detect initiation of the reduced power operating state and send a message to the receiver to maintain the normal amplitude of the optical signal on the electro-optical link.

Description

Background technique [0001] The present invention relates to the field of computer interconnection. [0002] Computer interconnection applications are increasingly based on the Peripheral Component Interconnect Express (PCIe) standard, which has gained popularity in both desktop computing and embedded systems due to its high data throughput and openness (ie, using non-proprietary technology). widely used. One of the features of the PCIe standard is support for connecting a host controller (such as a personal computer or PC) to a device (or target) that is separated by some distance. However, the electrical specification limits the interconnect length to approximately 15 meters and does not provide the electrical isolation between the host controller and target device that may be required in some applications. [0003] The use of optical communication links in certain applications is well known. Optical links provide electrical isolation and, in most cases, allow for much gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/14G06F13/38
CPCH04B10/40G06F13/14G06F13/38
Inventor 马龙·兹比格纽·卡斯普里基克
Owner TERADYNE