CN2389446Y - 10 M bps optical fibre receiving/transmitting apparatus for communication of computer Ethernet - Google Patents
10 M bps optical fibre receiving/transmitting apparatus for communication of computer Ethernet Download PDFInfo
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- CN2389446Y CN2389446Y CN99244573U CN99244573U CN2389446Y CN 2389446 Y CN2389446 Y CN 2389446Y CN 99244573 U CN99244573 U CN 99244573U CN 99244573 U CN99244573 U CN 99244573U CN 2389446 Y CN2389446 Y CN 2389446Y
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- fiber
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Abstract
The utility model relates to an optical fiber transceiver. In the utility model, the COL end, the Rx end and the Tx end of an executive chip are respectively connected with a coupler which is connected with an AUI interface; the SQE end of the executive chip is connected with an option switch; the work state output end of the executive chip is connected with a display, the Vin end and the TxOUT end of the executive chip are respectively connected with a PIN acceptance component and an emission component; the PIN acceptance component and the emission component are respectively connected with an optical fiber interface; DC voltage of the AUI interface is connected with a voltage reducing and voltage stabilizing circuit. The transmission speed of the utility model is 10Mbps, the utility model doesn't adopt crystal or a clock timer, and besides, the utility model has the advantages of high anti-interference ability, stable operation and low cost. The utility model is suitable for optical interconnection among host machines, servers, repeaters, hubs and terminal sets as well as among terminal sets in Ethernet.
Description
The invention relates to a kind of fiber optical transceiver.
Ethernet (Ethernet) is present most popular Local Area Network technology.According to statistics, its node has reached more than 4,000 ten thousand in the global ranges in 1996, it is mainly used in the local area network (LAN)s such as campus, hospital, airport, factory, company, government bodies' office automation in several kilometer range, and it has the transmission rate height, network software is abundant, systemic-function is strong, install and connect simple, upgrading easily and advantage such as working service is convenient.Ethernet is with the work of the carrier sense multiple access that has collision detection (Carrier Sense Multiple Access With Collission Detect) mode (hereinafter to be referred as the CSMA/CD mode), carries out IEEE (institute of electrical and electronic engineers) 802.3 standards (the project 802 local area network standard of announcing in 1985).Ethernet has different transmitting physical media, wherein with optical fiber to be that the Ethernet 10BASE-F of transmitting physical medium has anti-interference, low-loss, long transmission distance (〉=2Km), advantage such as transmission rate height (can reach 10,100,1000Mbps), be very suitable for the light interconnection between the website of apart from each other.The 10BASE-F L standard that propose the nineties is used to replace connection standard between 10BASE-F OIRL (the Fiber Optic Inter-RepeaterLink) fibre optic repeater of formulating the beginning of the eighties, can construct the full duplex linkage section apart between two equipment of 2Km.
The purpose of the invention is to provide a kind of computer ethernet communication that is used for, transmission rate is the fiber optical transceiver of 10Mbps, it can be used between main frame, server, repeater, hub, the terminating machine and the interconnection of the light between terminating machine and the terminating machine, and the multimode fiber transmission range reaches 2Km.
This fiber optical transceiver is provided with the execution chip carrying out the fiber optic Ethernet 802.3-FL standard of IEEE and adopt the work of CSMA/CD mode.The reception input Vin of this execution chip connects the output of a photodetection amplifier module; The collision detection output COL that carries out chip connects collision detection group elementary of the coupler of impedance matching, the secondary access unit interface conflict port of (Attachment Unit Inteface is called for short the AUI interface) that is connected to of coupler collision detection group; The terminating machine receiving port Rx that carries out chip connects the elementary of coupler reception group, the secondary receiving port that connects the AUI interface of coupler reception group; The emission port of AUI interface connects the elementary of coupler emission group, the secondary terminating machine emission port Tx that carries out chip that connects of coupler emission group; The emission output TxOUT that carries out chip is connected to the light emission driving input of light-emitting diode emitting module; One group of signal quality errors of SQE (signal quality errors) termination of carrying out chip detects selector switch; The transceiver working state output terminal of carrying out chip connects one group of transceiver operating state display; The fiber-optic signal input of photodetection amplifier module and the fiber-optic signal output of light-emitting diode emitting module connect optical fiber interface respectively; The power output end of AUI interface connects integrated stable voltage circuit, to provide transceiver required power supply; The external main frame of AUI interface or other terminal equipment are realized the light signal conversion of host A UI interface and two optical fiber interfaces thus.Be connected in series divider resistance between the LMON port of said execution chip and the ground, the interface point of resistance is connected with light-emitting diode one end of transceiver operating state display, forms power supply and network contact LED display circuit; And COL end is connected with the JAB end, and contact is connected in series a resistance, forms " line with " gate circuit, conflicts and timeout mode LED display circuit with the light-emitting diode and the power supply composition of transceiver operating state display.Said photodetection amplifier module and light-emitting diode emitting module adopt PIN receiving unit and light-emitting diode emitting module respectively.
Said integrated regulated power supply adopts 7805 application-specific integrated circuit (ASIC)s to connect with dropping resistor to constitute decompression voltage regulator.
This transceiver is selected the execution chip of carrying out CSMA/CD mode work and IEEE 802.3-FL standard for use, can realize the conversion of the photosignal of host A UI interface and multimode fiber interface, and has a full duplex function, can provide to drive the accurate operating current of optical fiber light-emitting diode, thereby obtain precise transmit power.Secondly,, do not adopt crystal oscillator and clock timer, but utilize LMON pin and light-emitting diode, resistance, the power supply of carrying out chip to form power supply and lattice chain paths of LEDs display circuit owing to make full use of the characteristic of carrying out chip; Utilizing XMT, RCV, COL, a JAB and LMON5 pin of carrying out chip is open-collector characteristic in this integrated circuit, allow the COL pin be connected and connect a resistance with the JAB pin, constitute " line with " gate circuit, both save components and parts, realized the network state Presentation Function of transceiver again.In addition, the DC-AC-DC conversion stabilized voltage power supply circuit that this transceiver does not adopt this execution chip explanation guide to recommend, but the DC-DC decompression voltage regulator that directly adopts 7805 application-specific integrated circuit (ASIC)s and resistance series connection to constitute, not only prevented the electromagnetic interference of common voltage stabilizing circuit in the DC-AC-DC transfer process, and power consumption and heating have been reduced, also reduce element, improved stability, reduced cost.This transceiver can be used between main frame in the Ethernet, server, repeater, hub, the terminating machine and the interconnection of the light between terminating machine and the terminating machine, signal transmission rate is 10Mbps, multimode fiber transmission ultimate range 2Km, emission optical coupling power is-16.4dBm (60/125 μ m optical fiber) that typically surveying minimum sensitivity is 0.8 μ w (the fine footpath of 62.5 μ m).
Fig. 1 is the block diagram of this fiber optical transceiver.
Fig. 2 is the outside drawing of this fiber optical transceiver.
Fig. 3 is the circuit theory diagrams of this fiber optical transceiver.
Fig. 4 is power supply and network contact LED display circuit schematic diagram.
Fig. 5 is conflict and timeout mode LED display circuit schematic diagram.
Shown in Fig. 1～3, the 10Mbps fiber optical transceiver is by host A UI interface D
1, coupler U
2, IEEE 802.3-FL standard carries out chip U
1, PIN receiving unit HF1, LED emitting module HF2, SQE selector switch S
1, transceiver operating state display led s, DC-DC conversion integrated stable voltage circuit U
3, printed circuit board and shell 1, optical fiber interface 2, power interface 3 form.Fiber-optic signal is from the IN input of receiving unit HF1, and the light signal after conversion is exported from the OUT of emitting module HF2 again.AUI interface D
1(DB15) conflict, reception, emission port respectively with coupler U
2(ST-7033) collision detection group is secondary, the reception group is secondary, elementary connection is organized in emission.The collision detection group of coupler is elementary, the reception group is elementary, the emission group secondary respectively with carry out chip U
1COL, the Rx of (ML 4663 CQ), Tx end, the SQE end of carrying out chip connects one group of signal quality errors and detects selector switch S
1The photodetector of carrying out the Vin termination SiPIN structure of chip is the output of PIN receiving unit HF1 (HFD 3221); The light emission of carrying out the Tx-OUT termination photoelectric conversion component HF2 (select AlGaAs heterojunction light-emitting diode emitting module for use: HFE 4218) of chip drives input.5 LEDs pins (XMT, RCV, LMON, COL, JAB) of carrying out chip connect one group of transceiver operating state display.
Carry out chip can not adopt crystal oscillator and clock timer in circuit performance in order to make full use of ML 4663CQ integrated circuit, save components and parts, therefore constitute as shown in Figure 4 power supply and network contact LED display circuit by the LMON pin of carrying out chip, by U
1LMON end series resistor R
9, R
16Work as LED
1When sending out, show that the power unit of fiber optical transceiver is working properly than low-light level, at this moment+direct voltage of 5V is through LED
1And pass through R
16To ground, make LED
1Send out light than low-light level; Work as LED
1When sending out higher brightness, show that the transceiver network link is normal, at this moment U
1LMON end be in low level, transceiver receives airborne signals.
In order to utilize U
15 LEDs end be the characteristics of transistor collector open circuit in this chip, can allow the COL pin series resistor R again that is connected with the JAB pin
15(referring to Fig. 5) constitutes " line with " gate circuit.Work as U
1COL pin or JAB pin when being in low level, the direct voltage of+5V is through LED
4, R
15To U
1COL pin or JAB pin, make LED
4Shinny, this shows that the network of sending and receiving end is in conflict or timeout mode; Work as U
1COL pin or JAB pin when being in high level, the direct voltage of+5V can not make electric current through LED
4, thereby LED
4Do not work, this shows that conflict or overtime does not appear in the network of transceiver.In addition ,+5V process LED
2And R
11With U
1XMT pin series connection, work as LED
2When shinny, show that transceiver is in emission state; + 5V is through LED
3And R
12With U
1RCV pin series connection, work as LED
2When shinny, show that transceiver is in accepting state.
The DC--AC--DC switch voltage-stabilizing circuit that the power unit of transceiver does not adopt ML 4663 CQ chips explanation guide to recommend, and directly adopt application-specific integrated circuit (ASIC) U
3(7805) and resistance R
17The decompression voltage regulator that series connection constitutes has prevented the electromagnetic interference of common voltage stabilizing circuit in the DC-AC-DC transfer process, and has subtracted power consumption, thereby reduced heating, and reduced cost.Like this, the equipment (as main frame, server, repeater, hub or network interface card etc.) that contains the AUI interface provides the integrated stable voltage circuit of DC power supply to transceiver by the AUI interface.
During work, U
1Produce the airborne signals of 1MHz, whether network-bus on have information transmitting, if bus " is done ", then postpone emission information if intercepting, continue to intercept; Not having information to transmit if intercept network-bus, whether information and detection bus on have conflict produce, for this reason U if then sending immediately
1Produce 10MHz gating oscillator signal and be used to detect conflict, signal quality errors and obstruction.All websites take place if detected conflict, then stop transmission information immediately, and send the block signal of strengthening conflict immediately, so that can both detect conflict; After sending block signal, need to wait for a random time, repeat above-mentioned steps then again.
The signal transmission rate of this transceiver is 10Mbps, multimode fiber transmission ultimate range is 2Km, emission optical coupling power is-16.4dBm (60/125 μ m optical fiber), the typical minimum sensitivity of surveying is 0.8 μ w (the fine footpath of 62.5 μ m), can realize the conversion of the photosignal of AUI port and ST multimode fiber mouth.
Inductance of this transceiver and Resistor-Capacitor Unit adopt SMD, wherein L
1=L
2=4.7 μ H; R
1～R
4: 360 Ω; R
5=78 Ω; R
6=470 Ω; R
7=162 Ω; R
8=62 Ω; R
9～R
12, R
15: 1K Ω; R
14, R
17: 10 Ω; R
16=3K Ω; C
1, C
2, C
6, C
9, C
10, C
12, C
13, C
16: 0.1 μ F; C
3=22 μ F; C
5=10 μ F; C
7=4.7 μ F; C
8=0.047 μ F.
Claims (4)
1. the 10Mbps fiber optical transceiver that is used for the computer ethernet communication is provided with the execution chip carrying out the fiber optic Ethernet 802.3-FL standard of IEEE and adopt the work of CSMA/CD mode, it is characterized in that
1) optical fiber of carrying out chip receives the output that input Vin connects photodetector, and the collision detection output COL that carries out chip connects collision detection group elementary of coupler, the secondary conflict port that is connected to the AUI interface of coupler collision detection group; The receiving port Rx that carries out chip connects the elementary of coupler reception group, the secondary receiving port that connects the AUI interface of coupler reception group; The emission port of AUI interface connects the elementary of coupler emission group, the secondary emission port Tx that carries out chip that connects of coupler emission group; The emission output TxOUT that carries out chip is connected to the light emission driving input of photoelectric conversion component; One group of signal quality errors of SQE termination of carrying out chip detects selector switch; The transceiver working state output terminal of carrying out chip connects one group of transceiver operating state display; The fiber-optic signal input of photodetector and the fiber-optic signal output of photoelectric conversion component connect optical fiber interface respectively; The power output end of AUI interface connects integrated stable voltage circuit;
2) said photodetector is the PIN receiving unit;
3) said photoelectric conversion component is the light-emitting diode emitting module.
2. fiber optical transceiver as claimed in claim 1, be connected in series divider resistance between the LMON port that it is characterized in that carrying out chip and the ground, the interface point of resistance is connected with light-emitting diode one end of transceiver operating state display, forms power supply and lattice chain paths of LEDs display circuit.
3. fiber optical transceiver as claimed in claim 1, it is characterized in that the COL end of carrying out chip is connected with JAB, contact is connected in series a resistance, " line with " gate circuit of forming is formed with the light-emitting diode of transceiver operating state display and power supply and conflict and timeout mode LED display circuit.
4. fiber optical transceiver as claimed in claim 1 is characterized in that integrated regulated power supply is that 7805 application-specific integrated circuit (ASIC)s and dropping resistor are composed in series decompression voltage regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99244573U CN2389446Y (en) | 1999-09-16 | 1999-09-16 | 10 M bps optical fibre receiving/transmitting apparatus for communication of computer Ethernet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99244573U CN2389446Y (en) | 1999-09-16 | 1999-09-16 | 10 M bps optical fibre receiving/transmitting apparatus for communication of computer Ethernet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2389446Y true CN2389446Y (en) | 2000-07-26 |
Family
ID=34030633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99244573U Expired - Fee Related CN2389446Y (en) | 1999-09-16 | 1999-09-16 | 10 M bps optical fibre receiving/transmitting apparatus for communication of computer Ethernet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2389446Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103297130A (en) * | 2012-02-29 | 2013-09-11 | 深圳光启创新技术有限公司 | Communication terminal, relay terminal and communication system |
| CN105743577A (en) * | 2016-01-29 | 2016-07-06 | 杭州电子科技大学 | Visible light audio transmission system based on phase-locked loop |
-
1999
- 1999-09-16 CN CN99244573U patent/CN2389446Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103297130A (en) * | 2012-02-29 | 2013-09-11 | 深圳光启创新技术有限公司 | Communication terminal, relay terminal and communication system |
| CN105743577A (en) * | 2016-01-29 | 2016-07-06 | 杭州电子科技大学 | Visible light audio transmission system based on phase-locked loop |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |