CN104954143B

CN104954143B - A kind of network physical on-off control circuit topology of novel low-cost

Info

Publication number: CN104954143B
Application number: CN201510365917.6A
Authority: CN
Inventors: 汪俊杰; 郭学枫; 张福新; 崔太有; 丁汨江; 罗梓桂; 徐锋
Original assignee: Jiangsu Longxin Menglan Information Safety Technology Co Ltd
Current assignee: JIANGSU LEMOTE INFORMATION TECHNOLOGY Co.,Ltd.
Priority date: 2015-06-29
Filing date: 2015-06-29
Publication date: 2018-10-09
Anticipated expiration: 2035-06-29
Also published as: CN104954143A

Abstract

The invention discloses a kind of network physical on-off control circuit topologys of novel low-cost, including network card chip, network transformer, RJ45 network interfaces and push-pull circuit, it is connected between the network card chip and network transformer and by network signal bus between network transformer and RJ45 network interfaces, the output end of the push-pull circuit and the centre cap of network transformer connect, and the input terminal of the push-pull circuit is connect with network break-make control signal.The circuit topology controls to realize network physical break-make management based on network transformer centre cap level, has the characteristics that low cost, small size, realizes simple, compatible all-network Universal joint.

Description

A kind of network physical on-off control circuit topology of novel low-cost

Technical field

The present invention relates to a kind of network on-off control circuit topologys, more particularly to a kind of network physical of novel low-cost On-off control circuit topology.

Background technology

In the prior art, there are mainly two types of network physical on-off control method thereofs, one is by network interface card 1 and network transformation Increase a switch chip 3 for controlling break-make in network data bus between device 2, is controlled out by controlling signal 4 The turn-on and turn-off of chip 3 are closed to realize that the break-make control of network, circuit topology are as shown in Figure 1；Another kind is to select to have The network card chip 1 of enabled pin controls the enabled of network interface card 1 by controlling signal 4 and realizes that network break-make controls, and circuit topology is such as Shown in Fig. 2.First method needs to change the cabling form of differential data bus, easily influences signal quality, and needs to increase special Cost is increased with control chip；Second method drives layer intervention by network card software, and high to network interface card functional requirement.

Invention content

In view of the above shortcomings of the prior art, the object of the present invention is to provide a kind of network physical break-makes of novel low-cost Control circuit topology, solves the problems, such as network physical break-make.

The technical scheme is that such：A kind of network physical on-off control circuit topology of novel low-cost, packet Network card chip, network transformer and RJ45 network interfaces are included, between the network card chip and network transformer and network transformation It is connected by network signal bus between device and RJ45 network interfaces, the network physical on-off control circuit topology further includes pushing away Draw circuit, the output end of the push-pull circuit and the centre cap of network transformer connect, the input terminal of the push-pull circuit with Network break-make controls signal connection.

Further, the push-pull circuit includes P-channel metal-oxide-semiconductor field-effect transistor and N-channel metal The source electrode of oxide semiconductor field effect transistor, the P-channel metal-oxide-semiconductor field-effect transistor connects network The centre cap high reference level of transformer, the source electrode ground connection of the n channel metal oxide semiconductor field effect transistor, institute State drain electrode and the n channel metal oxide semiconductor field effect transistor of P-channel metal-oxide-semiconductor field-effect transistor Drain electrode connect and connect with the centre cap of network transformer, the P-channel metal-oxide-semiconductor field-effect transistor Grid connected with the grid of n channel metal oxide semiconductor field effect transistor and connect network interface control signal.

Technical solution provided by the present invention controls to realize that network physical is logical based on network transformer centre cap level Disconnected management has the characteristics that low cost, small size, realizes simple, compatible all-network Universal joint.

Its advantageous effect compared with prior art is：

1, compared with first method, technical solution of the present invention does not change the cabling form of differential data bus, does not influence Signal quality；Dedicated control chip need not be added, application cost is reduced；Circuit is small, simple in structure, is easy in cloth It is used in the compact circuit design of office；

2, compared with second method, technical solution of the present invention can control the logical of network in any time of host work It is disconnected, and the intervention of layer is driven without network card software, control is simple and reliable；It need not select the network interface card with ena-bung function, applicability Extensively；It need not modify to the drive software of network interface card.

Description of the drawings

Fig. 1 is the circuit topology schematic diagram that chip controls are controlled using network signal.

Fig. 2 is the circuit topology schematic diagram controlled using network interface card Enable Pin.

Fig. 3 is circuit topology schematic diagram of the present invention.

Fig. 4 is the circuit topology schematic diagram that the present invention applies on 82576 network interface cards of INTEL.

Specific implementation mode

With reference to embodiment, the invention will be further described, but not as a limitation of the invention.

Incorporated by reference to Fig. 3 and Fig. 4, network card chip 10 is connect by network signal bus with network transformer 20, network transformation Device 20 is connect by network signal bus with RJ45 network interfaces 30, P-channel metal-oxide-semiconductor field-effect transistor (PMOS) 40 and n channel metal oxide semiconductor field effect transistor (NMOS) 50 constitute push-pull circuit, the source electrode of PMOS 40 Centre cap datum 60, the source electrode ground connection of NMOS 50 are connected, the drain electrode of PMOS 40 and the drain electrode composition of NMOS 50 are recommended Circuit output end, is connected to the centre cap 21 of network transformer 20, and the grid of PMOS 40 and NMOS 50 are that push-pull circuit is defeated Entering end, it is connected to network break-make control signal 70.

For being applied on 82576 network interface cards of INTEL, J8073 is the network interface of embedded with network transformer, Q107 in Fig. 4 It is PMOS, Q30 is NMOS, and LAN1_CTR signals are the network break-make control signals of system.Since 82576 network interface cards of INTEL are normal When work, network transformer centre cap datum needs to reach 1.8V, so, when needing network interface to be connected, LAN1_CTR With regard to exporting low level, PMOS is connected at this time and NMOS is disconnected, and network transformer centre cap level connects to LAN_ at this time On 1.8V level nodes, to reach the level of 1.8V, meet network interface card normal communication condition, network interface is connected at this time；When need by When network communication disconnects, LAN1_CTR just exports high level, and PMOS is disconnected at this time and NMOS is connected, at this time network transformer center Tap level connects on ground level node, to reach the level of 0V, cannot be satisfied network interface card normal communication condition, at this time net Mouth disconnects.

Claims

1. a kind of network physical on-off control circuit topology of novel low-cost, including network card chip, network transformer and RJ45 Network interface passes through network between the network card chip and network transformer and between network transformer and RJ45 network interfaces Signal bus connects, it is characterised in that：Including push-pull circuit, the output end of the push-pull circuit and the center of network transformer are taken out The input terminal of head connection, the push-pull circuit is connect with network break-make control signal.

2. the network physical on-off control circuit topology of novel low-cost according to claim 1, it is characterised in that：It is described Push-pull circuit includes that P-channel metal-oxide-semiconductor field-effect transistor and N-channel metal oxide semiconductor field-effect are brilliant Body pipe, the centre cap senior staff officer of the source electrode connection network transformer of the P-channel metal-oxide-semiconductor field-effect transistor Examine level, the source electrode ground connection of the n channel metal oxide semiconductor field effect transistor, the P-channel metal oxide half The drain electrode of conductor field-effect transistor and the drain electrode connection of n channel metal oxide semiconductor field effect transistor simultaneously become with network The centre cap of depressor connects, grid and N-channel the metal oxidation of the P-channel metal-oxide-semiconductor field-effect transistor The grid of object semiconductor field effect transistor connects and connects network interface control signal.