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Sidetone elimination technology based two-line Ethernet communication interface circuit

A communication interface circuit and interface circuit technology, applied in the field of communication, can solve the problems of high wire cost and labor cost, high line power consumption, large consumables, etc. Effect

Inactive Publication Date: 2016-06-08
厦门立林科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a 2-wire Ethernet communication interface circuit based on sidetone cancellation technology, which solves the

Method used

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  • Sidetone elimination technology based two-line Ethernet communication interface circuit
  • Sidetone elimination technology based two-line Ethernet communication interface circuit
  • Sidetone elimination technology based two-line Ethernet communication interface circuit

Examples

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Embodiment Construction

[0027] See figure 2 , A 2-wire Ethernet communication interface circuit based on sidetone cancellation technology, including a transmission drive unit 10, a sidetone cancellation unit 20, and a transmission medium 30 connected in sequence. The transmission medium 30 includes a coaxial cable or a 2-wire cable.

[0028] Since the interface ends (RX+ and RX-) of the existing PHY interface 40 generally support the reception of single-ended input signals, the received signal after sidetone cancellation can be directly coupled to the RX+ or RX- of the PHY interface. The RX+ terminal or the RX- terminal of the received signal only needs to maintain a proper bias voltage.

[0029] For the interface end of the PHY interface 40 that cannot support receiving single-ended input signals, please refer to image 3 Generally, a single-ended-to-differential unit 50 is used to convert the single-ended signal output from the sidetone cancellation unit 20 into a balanced double-ended differential sig...

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PUM

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Abstract

The invention provides a sidetone elimination technology based two-line Ethernet communication interface circuit. The sidetone elimination technology based two-line Ethernet communication interface circuit comprises a transmission driving unit, a sidetone elimination unit and a transmission medium which are sequentially connected with one another. According to the sidetone elimination technology based two-line Ethernet communication interface circuit disclosed by the invention, bi-directional data transmission in a signal format of the Ethernet can be directly realized on one pair of two-line cables or one coaxial cable with relatively low cost and relatively low power consumption, and therefore, wiring wire cost and manual work cost can be saved. The communication technology has a significant use value in the intelligent control and special digitization system field.

Description

Technical field [0001] The present invention relates to the field of communications, in particular to a 2-wire Ethernet communication interface circuit based on sidetone cancellation technology. Background technique [0002] Ethernet is widely used in various data communication systems, including computer communication, industrial control, digital communities and other fields. See figure 1 , Traditional Ethernet cabling uses multiple pairs ( figure 1 Show four pairs in) twisted pair or optical fiber as the transmission medium. In twisted-pair wiring, the sending data and receiving data of bidirectional communication are usually carried out in different wire pairs. The traditional 10M / 100M Ethernet uses two pairs (4 wires) twisted pair to realize the communication connection between two nodes. One pair is used for sending and the other pair is used for receiving. The transformer is to achieve electrical isolation between equipment and suppress common mode interference. The sho...

Claims

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Application Information

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IPC IPC(8): H04M1/74H04M1/58
Inventor 周美杉
Owner 厦门立林科技有限公司