A New Low-Cost Network-Physical On-Off Control Circuit Topology

Abstract

The invention discloses novel low-cost network physical on-off control circuit topology. The topology comprises a network card chip, a network transformer, an RJ45 network interface and a push-pull circuit, wherein the network card chip and the network transformer are connected through a network signal bus, the network transformer and the RJ45 network interface are connected through a network signal bus, an output end of the push-pull circuit is connected with a center tap of the network transformer, and an input end of the push-pull circuit is connected with a network on-off control signal. The circuit topology realizes network physical on-off management on the basis of level control on the center tap of the network transformer, has the characteristics of low cost, small size and simplicity in implementation, is compatible with all network interfaces and is in common use.

Description

technical field [0001] The invention relates to a network on-off control circuit topology, in particular to a novel low-cost network physical on-off control circuit topology. Background technique [0002] In the prior art, there are mainly two methods for network physical on-off control. One is to add a switch chip 3 for controlling on-off on the network data bus between the network card 1 and the network transformer 2, and through the control signal 4 to control the on and off of the switch chip 3 to realize the on-off control of the network, and its circuit topology is as follows figure 1 As shown; the other is to select the network card chip 1 with the enable pin, and control the enable of the network card 1 through the control signal 4 to realize the network on-off control. The circuit topology is as follows figure 2 shown. The first method needs to change the routing form of the differential data bus, which is easy to affect the signal quality, and needs to add a ded...

AI Technical Summary

Problems solved by technology

The first method needs to change the routing form of the differential data bus, which is easy to affect the signal quality, and needs to add a dedicated control chip to increase the cost; the second method is intervened by the network card software driver layer, and has high requirements for network card functions.

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