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Apparatus and method for deskewing serial data transmissions

A technology of serial data flow and equipment, which is applied in the field of electronic devices and can solve problems such as reducing system data integrity

Active Publication Date: 2014-01-08
ANALOG DEVICES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, in electronic systems using high-speed (for example, 3 gigabits per second (Gbps) or greater) transmission, skew between multiple links or lanes can significantly reduce the data integrity of the system

Method used

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  • Apparatus and method for deskewing serial data transmissions
  • Apparatus and method for deskewing serial data transmissions
  • Apparatus and method for deskewing serial data transmissions

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Experimental program
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Embodiment Construction

[0024] The following detailed description of certain embodiments provides various descriptions of specific embodiments of the invention. However, the invention can be embodied in a multitude of different ways as defined and covered by the claims. In the description, reference is made to the drawings, wherein like reference numbers indicate identical or functionally similar elements.

[0025] An overview of an electronic system with a serial link

[0026] refer to figure 1 , an electronic system for transmitting data over a serial link according to one embodiment will be described below. The illustrated system 100 includes a first device 110 , a second device 120 , a serial link 130 including a plurality of serial lanes 130 a - 130 n , and a frame clock generator 150 . The term "link" refers to a data communication path between two devices. A link may include one or more channels, each of which provides an electrical connection between transmitters and receivers in the two d...

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Abstract

Apparatus and methods are disclosed, such as those involving deskewing serial data transmissions. One such apparatus includes a plurality of receivers (122a, 122b, 122n), each of which is configured to receive a serial data stream. Each of the receivers includes a shift register (380a-380d) including a plurality of stages (441a-447a, 441b- 447b, 441c-447c, 441d-447d) arranged in sequence to propagate a stream of characters. Each of the stages is configured to store a character, and shift the character to a next stage in response to a clock signal. The receiver also includes a multiplexer (384a-384d) having a plurality of inputs, each of the inputs being electrically coupled to a respective one of the stages of the shift register, and to select one of the stages to generate an output such that the outputs of the multiplexers in the receivers are deskewed.

Description

technical field [0001] Embodiments of the invention relate to electronic devices, and more particularly, in one or more embodiments, to serial data transmission for electronic devices. Background technique [0002] Many electronic systems use serial data transfer between devices. Some electronic systems carry serial data streams using multiple links or lanes for efficient data communication. [0003] In such instances, it is desirable for the serial data streams transmitted over the multiple links or lanes to be synchronized for data integrity of the system. However, serial data transmitted over multiple links or lanes is susceptible to various sources of skew such as temperature and board layout. The term "skew" refers to the phenomenon that signals transmitted simultaneously from one or more devices arrive at one or more other devices at different times. In particular, in electronic systems using high-speed (eg, 3 gigabits per second (Gbps) or greater) transmission, ske...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/14H04L7/04H04J3/06
CPCH04J3/0658H04L7/04H04L25/14
Inventor M·亨内蒂
Owner ANALOG DEVICES INC