CN210327864U

CN210327864U - Energy-saving optical fiber interface circuit for Ethernet switch

Info

Publication number: CN210327864U
Application number: CN201921636702.3U
Authority: CN
Inventors: 夏成凤
Original assignee: Nanjing Aotong Intelligent Technology Co ltd
Current assignee: Nanjing Aotong Intelligent Technology Co ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-04-14
Anticipated expiration: 2029-09-27

Abstract

The utility model discloses an energy-conserving fiber interface circuit for ethernet switch, its characterized in that: the optical fiber optical transceiver comprises an optical module, a triode, an MOS (metal oxide semiconductor) tube and a voltage comparator, wherein when an optical fiber emits light, a pin 10 of the optical module receives an optical signal, a pin SD (secure digital) of the optical module outputs a high level, a pin output of the voltage comparator transmits a high level signal of the pin SD of the optical module to drive the triode to be conducted, a collector electrode of the triode outputs a low level to drive a grid electrode of the MOS tube to conduct the MOS tube, and a pin 11 of the optical module sends the optical signal outwards to realize bidirectional communication; when the optical module does not receive the optical signal, the SD pin of the optical module outputs a low level, the triode and the MOS tube are not conducted, a signal sending power supply of the optical module is turned off, and the optical module enters a low-power-consumption standby mode. The utility model discloses there is no light signal automatic control optical module send direction power to open or close according to receiving the light direction, realizes energy-conserving design.

Description

Energy-saving optical fiber interface circuit for Ethernet switch

Technical Field

The utility model relates to an ethernet switch is energy-conserving field, especially relates to an energy-conserving fiber interface circuit for ethernet switch.

Background

The optical module is composed of an optoelectronic device, a functional circuit, an optical fiber interface and the like, wherein the optoelectronic device comprises a transmitting part (Tx) and a receiving part (RX), the optical module is used for photoelectric conversion, a transmitting end converts an electric signal into an optical signal, and a receiving end converts the optical signal into the electric signal after the optical signal is transmitted through an optical fiber. The optical fiber interface is a physical interface for connecting an optical fiber cable, and the principle of the optical fiber interface is that light enters an optically thinner medium from an optically denser medium to be totally reflected, and the optical fiber interface generally has types of SC, ST, FC and the like. The FC interface is a round threaded optical fiber interface, is used on a distribution frame most, is generally adopted by a telecommunication network, and has the advantages of firmness, dust prevention and short installation time; ST and SC interfaces are commonly used in common networks, the ST interface is a clamping type circular optical fiber interface, and a bayonet is used for fixing after the ST head is inserted and rotates for half a circle, so that the ST head is easy to break; the SC interface is a clamping type square optical fiber interface, is directly plugged and pulled out, is very convenient to use, has the defect of easy falling out, and is generally used for a router switch.

However, in the prior art, the optical module is always in a working state, the loss is large, and the purpose of automatically controlling the power supply of the optical module in the sending direction to be turned on or turned off according to whether a light signal exists in the light receiving direction cannot be achieved.

Disclosure of Invention

The purpose of the invention is as follows: to the optical module among the prior art is in operating condition always, the great defect of loss, the utility model discloses an energy-conserving fiber interface circuit for ethernet switch for automatic control optical module's receiving and dispatching signal conversion and standby state adjustment.

The technical scheme is as follows: the utility model discloses an energy-saving optical fiber interface circuit for an Ethernet switch, which comprises an optical module U3, a triode Q1, a MOS tube Q2 and a voltage comparator U4; the optical module (U3) is connected with an optical fiber, a 10 pin of the optical module (U3) is an optical fiber receiving pin, a 11 pin of the module (U3) is an optical fiber sending pin, an SD pin of the optical module U3 is connected with an input pin 3 pin of a voltage comparator U4, an input pin 2 pin of the voltage comparator U4 is connected in series with a first resistor R101 and connected with a power supply 3V3, an input pin 2 pin of the voltage comparator U4 is connected in parallel with a first voltage stabilizing diode D1 and connected with a first capacitor C25 to be grounded, an output pin of the voltage comparator U4 is connected in series with a second resistor R125 and a base of a triode Q1, a collector of the triode Q1 is connected in series with a third resistor 82 and then connected in parallel with a power supply 3V3 and a grid of a MOS tube Q2.

Preferably, the optical module U3 is an ST optical module, the transistor Q1 is an NPN transistor, and the MOS transistor Q2 is a P-channel MOS transistor.

Further, when the optical fiber emits light and the 10 pin of the optical module (U3) receives an optical signal, the SD pin of the optical module (U3) outputs a high level of 3.3V, which is higher than the 2.5V voltage reference level of the 2 pin of the inverting input terminal of the voltage comparator (U4), the output pin of the voltage comparator (U4) transmits a high level signal of the SD pin of the optical module (U3), the triode (Q1) is driven to be turned on, the collector of the triode (Q1) outputs a low level, the gate of the MOS transistor (Q2) is driven, so that the MOS transistor (Q2) is turned on, the 5 pin of the light-emitting power supply of the optical module (U3) is connected with the power supply (3V3), the light-emitting power supply is turned on, and the optical signal is sent out through the 11 pin, thereby realizing;

when the optical module U3 does not receive an optical signal, the SD pin of the optical module U3 outputs a low level, the output pin of the voltage comparator U4 transmits a level signal of the 2 pin of the voltage comparator U4, the transistor Q1 is not turned on, the collector of the transistor Q1 outputs a high level, so that the MOS transistor Q2 is not turned on, the signal power supply for transmitting the optical module U3 is turned off, and the optical module U3 enters a low power standby mode.

Has the advantages that: the utility model discloses there is no light signal automatic control optical module send direction power to open or close according to receiving the light direction, realizes energy-conserving design.

Drawings

Fig. 1 is a general circuit diagram of the present invention;

fig. 2 is a pin diagram of the voltage comparator of the present invention;

fig. 3 is a pin diagram of the optical module of the present invention.

Detailed Description

The utility model discloses a light-emitting power supply of SD signal control optical module of 4 pin outputs of optical module.

The utility model discloses an energy-saving optical fiber interface circuit for an Ethernet switch, which comprises an optical module U3, a triode Q1, a MOS tube Q2 and a voltage comparator U4, as shown in the attached figure 1; the optical module (U3) is connected with an optical fiber, a 10 pin of the optical module (U3) is an optical fiber receiving pin, a 11 pin of the module (U3) is an optical fiber sending pin, an SD pin of the optical module U3 is connected with an input pin 3 pin of a voltage comparator U4, an input pin 2 pin of the voltage comparator U4 is connected in series with a first resistor R101 and connected with a power supply 3V3, an input pin 2 pin of the voltage comparator U4 is connected in parallel with a first voltage stabilizing diode D1 and connected with a first capacitor C25 to be grounded, an output pin of the voltage comparator U4 is connected in series with a second resistor R125 and a base of a triode Q1, a collector of the triode Q1 is connected in series with a third resistor 82 and then connected in parallel with a power supply 3V3 and a grid of a MOS tube Q2.

As shown in fig. 2, pin 2 of the voltage comparator U4 is connected to a reference voltage source 2.5V, which is the inverting input terminal of the voltage comparator, pin 3 is the non-inverting input terminal of the voltage comparator U4, when pin 3 of the voltage comparator is higher than pin 2, the output is at a high level, and when pin 3 is lower than pin 2, the output is at a low level. The TXOP is a positive input pin of a differential signal of a light emitting direction of an optical module; the TXOM is a differential signal negative input pin in the light emitting direction of the optical module; RXIP is a differential signal positive input pin in the light receiving direction of the optical module; RXIM is a differential signal negative input pin in the light receiving direction of the optical module;

preferably, the optical module U3 is an ST optical module, the transistor Q1 is an NPN transistor, and the MOS transistor Q2 is a P-channel MOS transistor, as shown in fig. 3.

The utility model discloses there is no light signal automatic control optical module send direction power to open or close according to receiving the light direction, realizes energy-conserving design.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. An energy efficient fiber optic interface circuit for an ethernet switch, comprising: the circuit comprises an optical module (U3), a triode (Q1), an MOS (metal oxide semiconductor) tube (Q2) and a voltage comparator (U4); the optical module (U3) is connected with an optical fiber, a 10 pin of the optical module (U3) is an optical fiber receiving pin, a 11 pin of the module (U3) is an optical fiber sending pin, an SD pin of the optical module (U3) is connected with a 3 pin of an input pin of a voltage comparator (U4), a 2 pin of an input pin of the voltage comparator (U4) is connected with a first resistor (R101) in series and connected with a power supply (3V3), a 2 pin of an input pin of the voltage comparator (U4) is connected with a first voltage stabilizing diode (D1) in parallel and connected with a first capacitor (C25) in a grounding mode, an output pin of the voltage comparator (U4) is connected with a second resistor (R125) in series and a base of a triode (Q1) in series, a third resistor (R82) of a collector of the triode (Q1) is connected with a power supply (3V3) and a grid of an MOS (Q2.

2. A power efficient fiber optic interface circuit for an ethernet switch according to claim 1, wherein: the optical module (U3) is an ST optical module, the triode (Q1) is an NPN type triode, and the MOS tube (Q2) is a P-channel MOS tube.