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Vehicle-mounted Ethernet circuit board

A technology of Ethernet and circuit board, which is applied in printed circuit, printed circuit manufacturing, printed circuit making wiring diagram, etc., can solve the problems of signal quality and anti-interference performance deterioration, and achieve enhanced anti-interference ability of Ethernet, high efficiency and low cost Insufficient performance, effect of reducing interference noise

Inactive Publication Date: 2017-03-08
YANFENG VISTEON ELECTRONICS TECH (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the limit of guaranteed 100ohm impedance, the wiring is only about 4mils, which will cause a large change in impedance due to slight changes in line width caused by manufacturing errors, which will cause deterioration of signal quality and anti-interference performance

Method used

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  • Vehicle-mounted Ethernet circuit board

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Embodiment Construction

[0026] The embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention. All similar structures and similar changes of the present invention should be included in the scope of protection of the present invention. The commas in all indicate the relationship between and.

[0027] Such as figure 1 As shown, a vehicle-mounted Ethernet circuit board provided by an embodiment of the present invention includes a PCB substrate, and an Ethernet driver module U1 and an Ethernet connector U2 installed on the PCB substrate;

[0028] The PCB substrate is a multilayer board, and printed on the PCB substrate are a differential line and a return line connecting the Ethernet drive module U1 and the Ethernet connector U2; the return line is a positive power supply printed on the PCB substrate wire or ground wire;

[0029] It is characterized in that: the dif...

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Abstract

A vehicle-mounted Ethernet circuit board relates to the field of automobile electronic technologies, and aims at solving the technical problem in anti-interference. The circuit board comprises a PCB substrate, and an Ethernet driving module and an Ethernet connecting piece mounted on the PCB substrate; the PCB substrate is printed with differential and backflow lines through which the Ethernet driving module is mounted with the Ethernet connecting piece, differential and backflow lines are laid on layers not adjacent to each other, and the differential line is provided with first and second common-mode inductors, first and second static inhibition diodes, first to fourth filtering capacitors and first to fourth filtering resistors. The circuit board provided by the invention is high in anti-interference capability.

Description

technical field [0001] The invention relates to automobile electronic technology, in particular to a technology of a vehicle-mounted Ethernet circuit board. Background technique [0002] As driver assistance systems become more common and infotainment systems become more complex, the bandwidth requirements of in-vehicle networks are also increasing. Therefore, in-vehicle Ethernet technology has a tendency to gradually replace CAN. [0003] Automotive Ethernet can significantly reduce system complexity, connection costs, and wiring weight, and facilitate future expansion to optical fiber standards. However, its frequency is high and the speed is fast, and large data transmission is sensitive to interference, and the signal quality requirements are relatively high. The environment is harsh, and its anti-interference performance needs to be continuously strengthened and improved to meet the requirements, and the use of layout and routing optimization to achieve anti-interferenc...

Claims

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Application Information

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IPC IPC(8): H04L12/02H05K3/00
CPCH04L12/02H05K3/0002
Inventor 林荣生
Owner YANFENG VISTEON ELECTRONICS TECH (SHANGHAI) CO LTD
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