Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Network interface with filtering device

A filter device and network port technology, applied in the direction of data exchange details, etc., can solve the problems of low filter capacitor efficiency and increased equipment cost, and achieve the effect of reducing area, saving cost, and avoiding parasitic inductance

Active Publication Date: 2006-01-25
NEW H3C TECH CO LTD
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the frequency characteristics of various filter capacitors and the parasitic inductance introduced by PCB wiring, they are only very effective for filtering high-frequency electromagnetic signals above 500M, so the efficiency of filter capacitors is low. lead to a substantial increase in equipment costs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Network interface with filtering device
  • Network interface with filtering device
  • Network interface with filtering device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0038] First embodiment: figure 2 It is the schematic circuit diagram of this embodiment.

[0039] figure 2 Middle 1 is the input port of the network port, the filtering device includes magnetic bead L1 and capacitors C1 and C2, vin is the external power supply, and Vct1 is the power supply of the input port of the network port. C2 is the parasitic capacitance of the printed circuit board. One end of L1 is connected to the external power supply vin, the other end is connected to the input port of the network port together with C1 and C2, and the other end of C1 and C2 is connected to the ground.

[0040] image 3 It is the schematic diagram of the PCB design of the magnetic bead L1 and the capacitor C1. The network port has 10 pins, of which 1 to 8 are signal pins; pin 9 is the power input pin of the network port; pin 10 is the ground (GND). The external power supply Vin is led from the bottom surface of the PCB to the Gigabit Ethernet port. After Vin is filtered by the f...

no. 2 example

[0043] The second embodiment: In this embodiment, the case of one network port is described.

[0044] In this embodiment, the network port with filtering device includes a connector with an integrated transformer, a network port power input pin (ie, center tap CT), and a Gigabit Ethernet port composed of magnetic beads L, capacitor C1, and parasitic inductance C2 filter device; in the present invention, L adopts a magnetic bead with a rated DC freewheeling capacity greater than 150mA to meet the power demand of the center tap CT of the network port transformer. C1 can be used with 0.01u~0.1u surface-mounted ceramic capacitors, which can respectively supply power to the center tap of the corresponding network port transformer, and can also filter out the noise signal from the network port transformer or from Vin, the network port transformer and Vin are both Connected to C1, the noise generated by the network port transformer and Vin is filtered through the capacitor. The filt...

no. 3 example

[0049] The third embodiment: the network port circuit with multiple network ports in this embodiment is as Figure 4 Shown:

[0050] In this embodiment, the network port with filtering device includes a connector with an integrated transformer, a network port power input pin (ie, center tap CT), and a Gigabit Ethernet port composed of magnetic beads, capacitors, and parasitic inductance C2 Filter device; each Gigabit Ethernet port has an independent filter circuit. Such as Figure 5 As shown, L1, C1, and C2 form the filter circuit of Gigabit Ethernet port 1; L2, C3, and C4 form the filter circuit of Gigabit Ethernet port 2; L3, C5, and C6 form the filter circuit of Gigabit Ethernet port 3 filter circuit. These three sets of filter circuits are independent of each other and do not affect each other.

[0051] In this embodiment, L1, L2, and L3 use magnetic beads with a rated DC freewheeling capacity greater than 150mA to meet the power demand of the center tap CT of the netw...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A network interface with filtering device consists of connector of integrate network interface transformer, power input pin of network interface transformer and filtering device. The said filtering device consists of inductive component connected to external power, capacitive component connected on ground, two said components common node connected to power input pin of network interface transformer. It features that each filtering device corresponds to a network interface and each filtering device is connected to external power and network interface power input pin separately.

Description

technical field [0001] The invention relates to a technology for reducing high-frequency electromagnetic radiation of an Ethernet network port, especially a network port with a filtering device. Background technique [0002] With the development of Ethernet technology, a large number of devices using Gigabit Ethernet are popularized. At present, the network ports with filter devices in the prior art are usually as figure 1 shown. [0003] figure 1 Among them, the network port transformer and the network port connector form the Gigabit Ethernet port. The PHY (physical layer) chip outputs Gigabit Ethernet data signals through each Gigabit Ethernet port. CT (Center Tap) is the power input pin of the network port transformer. The current input by the external power supply Vin, after passing through the filter circuit composed of magnetic beads L and capacitor C, becomes Vct, and is sent to the network port transformer through the CT pin. figure 1 The three-way network port ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/02
Inventor 沈明董树国吕晗
Owner NEW H3C TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com