CN2609288Y - Single wire communication circuit - Google Patents
Single wire communication circuit Download PDFInfo
- Publication number
- CN2609288Y CN2609288Y CN 03224036 CN03224036U CN2609288Y CN 2609288 Y CN2609288 Y CN 2609288Y CN 03224036 CN03224036 CN 03224036 CN 03224036 U CN03224036 U CN 03224036U CN 2609288 Y CN2609288 Y CN 2609288Y
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- receiving terminal
- node
- telecommunication circuit
- terminal node
- single line
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Abstract
The utility model discloses a single wire communication circuit which is used for signal transmission among two or more than two pieces of electronic equipment. The utility model comprises a sending terminal, a sending terminal node which is connected with the sending terminal, a receiving terminal, a receiving terminal node which is connected with the receiving terminal and a signal wire. The utility model is characterized in that the signal wire is connected with the receiving terminal node through the sending terminal node; the sending terminal node at least keeps the signal wire communicated with the receiving terminal node when the receiving terminal receives signals. After connected in series, the receiving terminal node and the sending terminal node are connected with the same signal wire, so the sending terminal node keeps communicated when the receiving terminal receives the signals and is homologous to a switching head. Therefore, the utility model can realize asynchronous half-duplex serial communication with only one signal wire. The utility model has the advantages of simple circuit, few signal wires, reduced communication cost and simple design and maintenance.
Description
Technical field:
The utility model relates to a kind of single line telecommunication circuit.
Background technology:
Communicating at two equipment rooms is the problem that we run into through regular meeting.And our employed communication mode has two kinds of serial communication and parallel communicationss.Because the required line of parallel communications mode is more, as the parallel communications of carrying out one 8 bit data just needs 9 lines just can finish under without any the situation of handshake, so this method seldom is used.And we what extensively adopt is exactly serial communication mode.As the RS232 that we usually use, standard serial communication protocols such as RS485, as shown in Figure 1.We minimumly still need to use RXD but adopt this communication protocol, three holding wires of TXD and GND, and one group ± 12V power supply need be provided separately or use special-purpose level transferring chip MAX232 etc. to carry out could being connected with main system after the level conversion and communicate.So not only make become complexity but also cost pressure of communication interface circuit bigger.
Summary of the invention:
The purpose of this utility model provides the telecommunication circuit that a kind of circuit is simple, holding wire is few exactly in order to overcome the above problems, and makes the cost of communication reduce, and design and maintenance are all very simple.
The utility model realizes that the scheme of above-mentioned purpose is: a kind of single line telecommunication circuit, be used for the signal transmission between two or two the above electronic equipments, it comprises transmitting terminal and the sender node that links to each other with transmitting terminal, receiving terminal and the receiving terminal node that links to each other with receiving terminal, and holding wire, it is characterized in that: described holding wire links to each other with receiving terminal node by sender node, and sender node is being communicated with of inhibit signal line and receiving terminal node when the receiving terminal received signal at least.
Adopt the beneficial effect of above scheme: because receiving terminal node and sender node are connected on the same holding wire after being in series, when the receiving terminal received signal, sender node keeps being communicated with, and is equivalent to an adapter.Therefore the utility model only needs a holding wire, just can realize the asynchronous half-duplex serial communication, and circuit is simple, and holding wire is few, makes the cost of communication reduce, and design and maintenance are all very simple.
Description of drawings:
Fig. 1 is structure and the line schematic diagram that adopts the RS232 serial communication protocol;
Fig. 2 is a principle schematic of the present utility model;
Fig. 3 is the schematic diagram of the utility model embodiment.
Embodiment:
Also in conjunction with the accompanying drawings the utility model is described in further detail below by specific embodiment.
As shown in Figure 2, be to be used for two electronic equipments 1 shown in the present embodiment, a kind of single line telecommunication circuit of signal transmission between 2, it is made up of the corresponding mutually telecommunication circuit of two covers, every cover telecommunication circuit comprises transmitting terminal 11,21 (first the cover be 11, second cover is 21, down with) and with transmitting terminal 11,21 sender node 13 that link to each other, 23, receiving terminal 12,22 and with receiving terminal 12,22 receiving terminal nodes 14 that link to each other, 24, and holding wire, described holding wire is by sender node 13,23 with receiving terminal node 14,24 link to each other, sender node 13,23 at least at receiving terminal 12, inhibit signal line and receiving terminal node 14 during 22 received signals, 24 connection--certainly, also can make transmitting terminal 11,21 successively by sender node 13,23 and receiving terminal 12,22 keep and receiving terminal node 14,24 normal opens come to this as shown in Figure 3.
As shown in Figure 2, described sender node 13,23, receiving terminal node 14,24 are made up of isolating converter.Second transmitting terminal 21 makes its node of controlling keep being communicated with when first transmitting terminal 11 sends information, and second receiving terminal 22 is responsible for reception.Make the node of first transmitting terminal 11 keep being communicated with after first complete equipment 1 distributes frame data, first receiving terminal 12 is responsible for receiving data simultaneously.Continuous like this hocketing just can be finished the asynchronous half-duplex serial communication of 2 of first complete equipment 1 and second complete equipments.This structure can also make transmitting apparatus also can receive the signal that oneself has sent on the channel simultaneously, can carry out verification to it easily.
As shown in Figure 3, described four Signal Spacing transducers are made up of light lotus root IC1, IC2, PC1, a PC2 respectively; In device A, holding wire connects the signal input part of the first smooth lotus root IC1 and the signal output part of the second smooth lotus root IC2 by forward diode D1, the signal output part of the first smooth lotus root IC1 meets the first receiving terminal RXD_A, and the signal input part of the second smooth lotus root IC2 meets the first transmitting terminal TXD_A; In equipment B, holding wire connects the signal output part of the 3rd smooth lotus root PC1 and the signal input part of the 4th smooth lotus root PC2 by diode D3, the signal input part of the 3rd smooth lotus root PC1 meets the second transmitting terminal TXD_B, and the signal output part of the 4th smooth lotus root PC2 meets the second receiving terminal RXD_B.Present embodiment adopts the light lotus root to realize isolating conversion, can realize simply isolating and conversion, as between Transistor-Transistor Logic level and the RS232 level even have the equipment of forceful electric power and the conversion of the isolation between the Transistor-Transistor Logic level, make between two communication equipments it can is not also can communicate by letter with a kind of level.Wherein, diode D1, D3, resistance R 3, R8 is the additional protection element, can prevent the infringement that reverse voltage that wiring error or other reasons cause causes the light lotus root.
The utility model also is provided with communication power supply acquiring unit 30, and its input links to each other with civil power, and the power input of the active device in output and the described telecommunication circuit links to each other.Like this, this circuit need not to use independent power supply power supply.
Claims (6)
1. single line telecommunication circuit, be used for two or two above electronic equipments (1,2) the signal transmission between, it comprises transmitting terminal (11,21) and with transmitting terminal (11,21) sender node (13 of Xiang Lianing, 23), receiving terminal (12,22) and with receiving terminal (12,22) receiving terminal node (14 of Xiang Lianing, 24), and holding wire, it is characterized in that: described holding wire is by sender node (13,23) with receiving terminal node (14,24) link to each other sender node (13,23) at least at receiving terminal (12,22) inhibit signal line and receiving terminal node (14 during received signal, 24) connection.
2. a kind of single line telecommunication circuit as claimed in claim 1 is characterized in that: described sender node (13,23), receiving terminal node (14,24) are made up of the Signal Spacing transducer.
3. a kind of single line telecommunication circuit as claimed in claim 1 or 2 is characterized in that: described each electronic equipment all comprises transmitting terminal (11,21), sender node (13,23), receiving terminal (12,22) and receiving terminal node (14,24).
4. a kind of single line telecommunication circuit as claimed in claim 1 or 2 is characterized in that: transmitting terminal (11,21) keeps and receiving terminal node (14,24) normal open by sender node (13,23) and receiving terminal (12,22) successively.
5. a kind of single line telecommunication circuit as claimed in claim 1 or 2 is characterized in that: described four Signal Spacing transducers can be made up of the light lotus root, also can constitute by isolating transceiver or isolating digital coupler.
6. a kind of single line telecommunication circuit as claimed in claim 1 or 2 is characterized in that: also comprise communication power supply acquiring unit (30), its input links to each other with civil power, and the power input of the active device in output and the described telecommunication circuit links to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03224036 CN2609288Y (en) | 2003-03-07 | 2003-03-07 | Single wire communication circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03224036 CN2609288Y (en) | 2003-03-07 | 2003-03-07 | Single wire communication circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2609288Y true CN2609288Y (en) | 2004-03-31 |
Family
ID=34163151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03224036 Expired - Fee Related CN2609288Y (en) | 2003-03-07 | 2003-03-07 | Single wire communication circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2609288Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3316461B1 (en) * | 2016-10-27 | 2020-12-02 | Power Integrations, Inc. | Half-bridge inverter modules with advanced protection through high-side to low-side control block communication |
-
2003
- 2003-03-07 CN CN 03224036 patent/CN2609288Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3316461B1 (en) * | 2016-10-27 | 2020-12-02 | Power Integrations, Inc. | Half-bridge inverter modules with advanced protection through high-side to low-side control block communication |
| US10903774B2 (en) | 2016-10-27 | 2021-01-26 | Power Integrations, Inc. | Half-bridge inverter modules with advanced protection through high-side to low-side control block communication |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN AND INTELLIGENT CONTROL AND THAILAND CO. Free format text: FORMER NAME OR ADDRESS: HEERTAI ELECTRONIC SCI-TECH CO., LTD. SHENZHEN |
|
| CP03 | Change of name, title or address |
Address after: D, building ten, building 518057, Institute of Aerospace Science and technology, South ten road, science and technology zone, Guangdong, Shenzhen Province, China Patentee after: ShenZhen H&T Intelligent Control CO., LTD. Address before: D building, block ten, Institute of international technology innovation, South ten road, hi tech Zone, Guangdong, Shenzhen, China: 518057 Patentee before: Heertai Electronic Sci. & Tech. Co., Ltd., Shenzhen City |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040331 Termination date: 20120307 |