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A transceiver unit for transmitting data via a differential bus

A bus and transmitter technology, applied in the field of differential communication networks, to achieve the effects of reducing interference, cutting off drive current, and simple settings

Active Publication Date: 2019-05-03
MELEXIS TECH NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this transmitter unit reduces the line-related emissions in the bus, this improvement has nothing to do with protecting the line from interference, but only with the difference during the switching edges when switching from the dominant state to the recessive state. Symmetry improvements related to

Method used

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  • A transceiver unit for transmitting data via a differential bus
  • A transceiver unit for transmitting data via a differential bus
  • A transceiver unit for transmitting data via a differential bus

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Embodiment Construction

[0062] The present invention will be described with respect to particular embodiments and with reference to certain drawings but the invention is not limited thereto but only by the claims. The drawings described are only schematic and non-limiting. In the drawings, the size of some of the elements may be exaggerated and not drawn on scale for illustrative purposes. The dimensions and relative dimensions do not correspond to actual reductions to the practice of the invention.

[0063] The terms first, second etc. in the description and claims are used to distinguish between similar elements and not necessarily to describe a sequence in time, space, order or in any other way. It is to be understood that the terms so used are interchangeable under appropriate circumstances and that the embodiments of the invention described herein are capable of operation in other sequences than described or illustrated herein.

[0064] Furthermore, the terms top, bottom, etc. in the descripti...

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Abstract

A transmitter, for establishing communication between a device and a differential network bus, includes: current drivers connected to each line of the bus, through a conduction path of the transmitter; at least one unidirectional current regulator for extracting a current equal to a known ratio of a parasitic current circulating through the conduction path, inverse to the driving current through the conduction path connected to a first line; means for obtaining, from said current, a second current with a magnitude equal to the original magnitude of the parasitic current; means for introducingthe second current into the conduction path connected to the other line.

Description

technical field [0001] The invention relates to the field of differential communication networks. More specifically, it relates to methods and devices for connecting a bus with a control node. Background technique [0002] In modern integration technology, communication between multiple devices (such as master device, slave device, etc.) is often required. Typical examples would include communication between the controller in the vehicle and the different sensors, functional and passive systems, lighting systems, etc. For example, communication may be established between two or more nodes or devices via a differential network bus. [0003] An example of a differential communication network commonly used in automotive applications is a Controller Area Network (CAN), which is used as a way to reduce the amount of copper wiring through signal multiplexing. Over time, the requirements have been extended to the area of ​​electromagnetic compatibility. [0004] A simple signal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40H04L25/02
CPCH04L12/40169H04L25/0272H04L2012/40215G06F13/36G06F13/4022G06F13/42H04L25/0276H04L25/0282
Inventor M·弗雷T·弗赖塔格
Owner MELEXIS TECH NV
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