CN2317502Y - Modulator-demodulator connecting to universal computer - Google Patents

Abstract

The utility model relates to a modulator and demodulator connected to universal computers, which is formed by that a control circuit is composed of a modulator and demodulator special microprocessor and a crystal vibration circuit thereof, a read only memory, a read and write memory, a telephone line, an interface circuit, an output driver, etc., and an RXD, a TXD, an RTS, a DTC, a DTR and a GND signal lines are led out from the circuit of the output driver, and inserted in the handle inserting opening of a controller for a universal computer II. The device has the advantages of simple and practical circuit structure and interface function, reliable operation, favorable performance and low cost. The utility model is a new device which is provided for the universal computers to enter network world, and can further widen the application field of the universal computers.

Description

Be connected on the modulator-demodular unit on the popular computer

The utility model relates to a kind of exclusive data communication facilities, exactly, relates to a kind of modulator-demodular unit that is connected on the popular computer.

97200299.5), blattnerphone, family expenses colour TV and printer be as its input-output device the popular computer (patent No.: be that the applicant sets up 101 QWERTY keyboard, the Genius mouse (patent No.: on the computer games basis 95200896.3), utilize its internal storage capacity of study card expansion, and set up floppy disk and constitute the basic hardware configuration that its outside supplementary storage forms, be aided with again that corresponding system software and application software support and the computer learning machine of new generation succeeded in developing.This apparatus structure Nover practical, price are cheap, menu in Chinese simple to operate and full interface, particularly this device surface is to the beginner of numerous students in middle and primary schools and microcomputer, a kind of study computer knowledge is provided, understand the basic hardware configuration of computer programming language and Chinese and western languages word processor, and provide and impart rudimentary knowledge to beginners each section's purpose of middle and primary schools from the child and enrich teaching software, make it obtain consumers in general, especially the welcome of town and country salary family.Over the years, become and come into huge numbers of families, a kind of popular microcomputer that is easy to learn and use.

The nineties computing machine enters the network mature period, the particularly appearance of Internet Internet, make that being distributed in (On-line) contact all online of millions of station information resources all over the world is integral, use for the user on the network, computer network brings more wide space for people's work, study, amusement, life.Now the people of each different regions, country will utilize computing machine and internet exchange message, shared resource every day in the world, and people's the visual field and thinking are opened fully, enter a more varied and colorful information world.Today, if a computing machine can not be realized networking, just can not give full play to its effect, will be very big regretting.

The purpose of this utility model provides a kind of modulator-demodular unit that is connected on the popular computer, this apparatus structure advantages of simple, function practicality, easy to use, make popular computer (or learning machine) except its original various functions, also but this device of mat is realized networking, to enjoy the various information services that computer internet provides.

The utility model is achieved in that mainly to be made up of the control circuit that has modulator-demodular unit special microprocessor chip, it is characterized in that: be installed on the above-mentioned control circuit: modulator-demodular unit special microprocessor chip and crystal oscillating circuit thereof, ROM chip, read-write memory chip, telephone line interface circuit, speaker interface circuit and output driver circuit; Wherein the output terminal of output driver circuit chip draw five connects signal wires and a ground wire, be plugged on by 15 core plugs in the II socket of the steering controller handle on the popular computer one side sidewall, above-mentioned five connection signal wires are respectively that reception data RXD, transmission data TXD, the request of drawing from popular computer II socket send RTS, removing and allow transmission CTS and data terminal ready DTR; Two lines of drawing from telephone line interface circuit then are connected with telephone wire.

Wherein the transfer rate of modulator-demodular unit special microprocessor integrated circuit (IC) chip can be 14.4kb/s or 33.6kb/s, its model can be the RC144ACF or the RC144ATF of U.S.'s Rockwell (Rockwell) company, also can be the respective model product of Taiwan connection China (UMC) company and company of Texas Instruments (TI).

Its structural shape can be built-in or two kinds of externals, both can make the cassette structure of the printed circuit board (PCB) that is installed in popular computer chassis inside, also can make the autonomous device that has shell.

Wherein the six roots of sensation connects signal wire RXD, TXD, RTS, CTS, DTR and GND and should be respectively be connected with the 15th, 12,11,7,6,1 lead leg of the II socket of popular computer steering controller handle.

Wherein six length that connect signal wire should be not more than 50 centimetres respectively.

The utility model is on the basis of common modulator-demodular unit, a kind of interface function that designs in conjunction with the software and hardware resources of popular computer and circuit structure is simple and practical, reliable operation, performance is good, price is low dedicated modem.The modulator-demodular unit of selling on the market has data transmission/fax/voice functions such as (DATA/FAX/VOICE) now, its transfer rate also nearly four, five kind, consider the software and hardware configuration of popular computer, the utility model has been deleted fax, the phonetic function of former modulator-demodular unit, has kept the basic function of its data transmission; Cancelled the RS-232C interface circuit of realizing the transmission level conversion, (as chips such as MC1488, MC1489), make the Transistor-Transistor Logic level signal in the control circuit in the utility model directly with popular computer in internal signal continue mutually, can finish the function that data transmission is communicated by letter equally; Suffered restriction is that distance between this modulator-demodular unit and the popular computer is not above 50 centimetres.So not only can make circuit structure relative with function simple and practical, but also can save cost, knock down price, make more popular computer user can enter the computer network world.Just can constitute home network computers as long as mix family expenses colour TV and the utility model and telephone wire as popular computer, can enjoy the various information services that computer internet provides, for example: filedownload downloaded by E-mail E-mail, bulletin board system BBS, electronic meeting Telconfrence, file and Internet browses or the like.In a word, the utility model has further been widened the application of popular computer as the another up-to-date hardware configuration of popular computer, also widens its popularizing application prospect for computer learning machine a new way is provided.

Fig. 1 is the structural representation that the utility model and popular computer constitute computer network;

Fig. 2 is a functional schematic of the present utility model;

Fig. 3 is a circuit structure diagram of the present utility model;

Referring to Fig. 1, the utility model is as a kind of input/output interface peripheral hardware of popular computer, mix family expenses colour television set and telephone wire again, just can enter China Public Computer Interconnection Network CHINANET, realize inserting the purpose of Internet online exchange message, shared resource by the public telephone switching network dialing.

Referring to Fig. 2, this figure has showed that visually the utility model is under the control of modulator-demodular unit special microprocessor chip, the pulse digital signal that popular computer is sent is modulated into simulating signal on the one hand, be sent to the other side through wherein telephone line interface circuit and telephone wire again, the simulating signal that again the other side is sent by telephone wire and interface circuit simultaneously is demodulated to pulse signal and sends into popular computer and handle.Come to this half-duplex ground of the utility model carries out data transmission communication and makes popular computer and far-end computer realization information interchange.

Circuit structure diagram referring to an embodiment of the utility model shown in Figure 3.The utility model mainly is made up of the control circuit that has modulator-demodular unit special microprocessor chip, mainly be installed on modulator-demodular unit special microprocessor chip and crystal oscillating circuit thereof on this control circuit, ROM chip (being illustrated as 128K), read-write memory chip (being illustrated as 32K), telephone line interface circuit, speaker interface circuit and output driver circuit (being illustrated as 74LS240), wherein the output terminal of output driver circuit chip draw five connects signal wires and a ground wire, be plugged on by 15 core plugs in the II socket of the steering controller handle on the popular computer one side sidewall, above-mentioned five connection signal wires are respectively the reception data RXD that draws from popular computer II socket, send data TXD, request sends RTS, remove and allow to send CTS and data terminal ready DTR; Two lines of drawing from telephone line interface circuit then are connected with telephone wire.Wherein the six roots of sensation connects signal wire RXD, TXD, RTS, CTS, DTR and GND and should be respectively be connected with the 15th, 12,11,7,6,1 lead leg of the II socket of popular computer steering controller handle.And the length of this six roots of sensation connection signal wire all should be within 50 centimetres.The transfer rate of the utility model modulator-demodular unit can be 14.4kb/s or 33.6kb/s, the model of its special microprocessor can be the RC144ACF or the RC144ATF of U.S. Rockwell company, also can be the respective model product of TIX or Taiwan Lian Hua company.

Communication control procedure between the utility model and the popular computer adopts Hayes (HAYES) standard AT command collection, adopt semiduplex working method between the two: when the popularization computer is ready for sending data, at first sending data terminal ready DTR request signal by popular computer to the utility model sends, it detects removing and the permission transmission cts signal that the utility model is replied then, when receiving to cts signal when effective, popular computer just can send serial data information to modulator-demodular unit by sending data TXD signal wire, is sent to far-end through telephone wire.When popular computer want the receiving remote data message and be in receive standby condition after, make data terminal ready DTR signal effective earlier, send request to send signal by the RTS signal wire to the utility model then, after modulator-demodular unit thinks that RTS effectively, just can send the long-range data message that transmits to popular computer through receiving data RXD signal wire.

The utility model is many of advanced developments, and have carried out test and implemented, on make normal reliable, for China popular computer family has increased a newcomer.

Claims (5)

1, a kind of modulator-demodular unit that is connected on the popular computer, mainly formed by the control circuit that has modulator-demodular unit special microprocessor chip, it is characterized in that: be installed on the above-mentioned control circuit: modulator-demodular unit special microprocessor chip and crystal oscillating circuit thereof, ROM chip, read-write memory chip, telephone line interface circuit, speaker interface circuit and output driver circuit; Wherein the output terminal of output driver circuit chip draw five connects signal wires and a ground wire, be plugged on by 15 core plugs in the II socket of the steering controller handle on the popular computer one side sidewall, above-mentioned five connection signal wires are respectively that reception data RXD, transmission data TXD, the request of drawing from popular computer II socket send RTS, removing and allow transmission CTS and data terminal ready DTR; Two lines of drawing from telephone line interface circuit then are connected with telephone wire.

2, the modulator-demodular unit that is connected on the popular computer as claimed in claim 1, it is characterized in that: wherein the transfer rate of modulator-demodular unit special microprocessor integrated circuit (IC) chip can be 14.4kb/s or 33.6kb/s, its model can be the RC144ACF or the RC144ATF of U.S.'s Rockwell (Rockwell) company, also can be the respective model product of Taiwan connection China (UMC) company and company of Texas Instruments (TI).

3, the modulator-demodular unit that is connected on the popular computer as claimed in claim 1, it is characterized in that: its structural shape can be built-in or two kinds of externals, both can make the cassette structure of the printed circuit board (PCB) that is installed in popular computer chassis inside, also can make the autonomous device that has shell.

4, the modulator-demodular unit that is connected on the popular computer as claimed in claim 1 is characterized in that: wherein the six roots of sensation connects signal wire RXD, TXD, RTS, CTS, DTR and GND and should be respectively be connected with the 15th, 12,11,7,6,1 lead leg of the II socket of popular computer steering controller handle.

5, the modulator-demodular unit that is connected on the popular computer as claimed in claim 4 is characterized in that: wherein six length that connect signal wire should be not more than 50 centimetres respectively.

Images