CN202773029U - Single data bus transmitting and receiving circuit - Google Patents
Single data bus transmitting and receiving circuit Download PDFInfo
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- CN202773029U CN202773029U CN201220481282.8U CN201220481282U CN202773029U CN 202773029 U CN202773029 U CN 202773029U CN 201220481282 U CN201220481282 U CN 201220481282U CN 202773029 U CN202773029 U CN 202773029U
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Abstract
The utility model discloses a single data bus transmitting and receiving circuit which includes a data receiving port, a data output port, an NPN-type triode, a PNP-type triode, a first diode, a second diode, a first resistor, a second resistor, a third resistor and a fourth resistor. The data receiving port is connected with the base electrode of the PNP-type triode via the fourth resistor. The base electrode of the PNP-type triode is connected with the emitter electrode of the PNP-type triode via a third resistor. The emitter electrode of the PNP-type triode is connected with a power supply. The collector electrode of the PNP-type triode is connected with the anode of the second diode. The cathode of the second diode is connected with a single data bus. The single data bus is connected with the anode of the first diode via the first resistor. The cathode of the first diode is connected with the base electrode of the NPN-type triode. The emitter electrode of the NPN-type triode is connected with the ground. The collector electrode of the NPN-type triode is connected with the power supply via the second resistor. The collector electrode of the NPN-type triode is connected with the data output port.
Description
Technical field
The utility model relates to forms data line communication technique field, particularly relates to a kind of forms data bus transmission circuit.
Background technology
At present, in the building conversational system, most RS-485, the CAN buses of adopting of building talkback unit doorway machine and indoor unit communication are carried out the communication data transmission.The system of RS-485, CAN bus architecture adopts that 5 lines are realized calling, intercommunications, unblanked, supervision, extension set and extension set IWF.Wherein, RS-485, CAN bus circuit need the application-specific integrated circuit circuit, and sort circuit more complicated, cost are higher, transmission line splits into two and transmits, an anodal data wire, and a negative pole data wire is negative, for the monobus transmission circuit, then many transmission lines.
The utility model content
Based on this, for the problems referred to above, the utility model proposes that a kind of circuit is simple, with low cost, the forms data bus transmission circuit of stable performance.
The technical solution of the utility model is: a kind of forms data bus transmission circuit, comprise the data receiver port, data-out port, NPN type triode, the positive-negative-positive triode, the first diode, the second diode, the first resistance, the second resistance, the 3rd resistance and the 4th resistance, the data receiver port links to each other through the base stage of the 4th resistance with the positive-negative-positive triode, the base stage of positive-negative-positive triode links to each other through the emitter of the 3rd resistance with the positive-negative-positive triode, the emitter of positive-negative-positive triode links to each other with power supply, the collector electrode of positive-negative-positive triode links to each other with the positive pole of the second diode, the negative pole access forms data bus of the second diode, the forms data bus links to each other through the positive pole of the first resistance with the first diode, the negative pole of the first diode links to each other with the base stage of NPN type triode, the grounded emitter of NPN type triode, the collector electrode of NPN type triode links to each other with power supply through the second resistance, and the collector electrode of NPN type triode also links to each other with data-out port.
The data receiver port is connected with the different pins of extension set in the unit room of doorway, unit respectively from data-out port.When the unit doorway machine to indoor transmission data, data arrive the forms data bus through the 4th resistance, the 3rd resistance, positive-negative-positive triode, the second diode, and then through the first resistance, the first diode, NPN type triode, the second resistance, arrive data-out port, be transferred to indoor unit by data-out port again.Can obtain the serial data of an anti-phase shaping on the collector electrode of NPN type triode, the anti-phase serial data of reduction forms data bus bus makes data that the data receiver port sends out and the data homophase of data-out port.
In a preferred embodiment, this transmission circuit also comprises the 3rd diode, the plus earth of the 3rd diode, negative pole access forms data bus.The 3rd diode is equivalent to a protection diode, and the overtension on the forms data bus by the plus earth of the 3rd diode, can discharge some larger static, effectively the voltage stabilization of bonding data/address bus.
In a preferred embodiment, this transmission circuit also comprises the 5th resistance, an end ground connection of the 5th resistance, other end access forms data bus.The 5th resistance is equivalent to an impedance matching resistance, transfer of data is got farther, more stable.
In a preferred embodiment, described power supply is+the 5V power supply.Purpose is the better effects if that makes whole transmission circuit.
The beneficial effects of the utility model are:
(1) whole circuit structure is simple, and stable performance can be satisfied the building conversational system data communication well, becomes low than RS-485, CAN application-specific integrated circuit chip;
(2) use this transmission circuit, data wire and ground wire transmission take full advantage of ground wire, reduce system wiring, can reach 500m in 1200bps baud rate ultimate range.
Description of drawings
Fig. 1 is the circuit theory diagrams of the described forms data bus of the utility model embodiment transmission circuit;
Fig. 2 is the schematic diagram that the utility model forms data bus transmission circuit is applied to building conversational system;
Description of reference numerals:
10-data receiver port, 20-data-out port, Q1-NPN type triode, Q2-PNP type triode, V1-the first diode, V2-the second diode, V3-the 3rd diode, R1-the first resistance, R2-the second resistance, R3-the 3rd resistance, R4-the 4th resistance, R5-the 5th resistance.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.
Embodiment:
As shown in Figure 1, a kind of forms data bus transmission circuit comprises data receiver port 10, data-out port 20, NPN type triode Q1, positive-negative-positive triode Q2, the first diode V1, the second diode V2, the 3rd diode V3, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4 and the 5th resistance R 5.Data receiver port 10 links to each other through the base stage of the 4th resistance R 4 with positive-negative-positive triode Q2, the base stage of positive-negative-positive triode Q2 links to each other through the emitter of the 3rd resistance R 3 with positive-negative-positive triode Q2, the emitter of positive-negative-positive triode Q2 links to each other with power supply, the collector electrode of positive-negative-positive triode Q2 links to each other with the positive pole of the second diode V2, the negative pole access forms data bus of the second diode V2, the forms data bus links to each other with the positive pole of the first diode V1 through the first resistance R 1, the negative pole of the first diode V1 links to each other with the base stage of NPN type triode Q1, the grounded emitter of NPN type triode Q1, the collector electrode of NPN type triode Q1 links to each other with power supply through the second resistance R 2, and the collector electrode of NPN type triode Q1 also links to each other with data-out port 20.
As shown in Figure 1, the plus earth of the 3rd diode V3, negative pole access forms data bus.The 3rd diode V3 is equivalent to a protection diode, and the overtension on the forms data bus by the plus earth of the 3rd diode V3, can discharge some larger static, effectively the voltage stabilization of bonding data/address bus.
As shown in Figure 1, an end ground connection of the 5th resistance R 5, other end access forms data bus.The 5th resistance R 5 is equivalent to an impedance matching resistance, transfer of data is got farther, more stable.
As shown in Figure 1, described power supply is+the 5V power supply to make the better effects if of whole transmission circuit.
Operation principle and the process of forms data bus transmission circuit described in the utility model are as follows:
As shown in Figure 2, in use, unit doorway machine, indoor unit access respectively this transmission circuit, and unit doorway machine, indoor unit MCU serial ports RX, TX pin connect RXD port (that is: data-out port 20), TXD port (that is: the data receiver port 10).With doorway, unit main frame, the indoor unit data wire hangs on the forms data bus, and the 5th resistance R 5 is connected on the end at the whole story, and system's ground wire consists of a complete hardware system altogether.The transceiving data flow process, the unit doorway machine sends data to indoor unit, the TX serial ports pin of the MCU of unit doorway machine is received on the TXD port (that is: the data receiver port 10) of this transmission circuit, be dealt on the forms data bus through the strong anti-phase serial data of this transmission circuit output load capacity, all indoor units on the forms data bus can be received data, data this transmission circuit on indoor unit is reduced into identical serial data, pass to the RX pin of MCU in RXD port (that is: data-out port 20) output, realize unit doorway machine and indoor unit data transmit-receive.It is identical that indoor unit sends the data principle to the unit doorway machine.All devices is regardless of the principal and subordinate, and the free time is in the reception communication data, receives that data communication device crosses protocol command and judge control.Judge whether first to be in idle condition when sending out data and could send communication data.
The above embodiment has only expressed embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.
Claims (4)
1. forms data bus transmission circuit, it is characterized in that, comprise the data receiver port, data-out port, NPN type triode, the positive-negative-positive triode, the first diode, the second diode, the first resistance, the second resistance, the 3rd resistance and the 4th resistance, the data receiver port links to each other through the base stage of the 4th resistance with the positive-negative-positive triode, the base stage of positive-negative-positive triode links to each other through the emitter of the 3rd resistance with the positive-negative-positive triode, the emitter of positive-negative-positive triode links to each other with power supply, the collector electrode of positive-negative-positive triode links to each other with the positive pole of the second diode, the negative pole access forms data bus of the second diode, the forms data bus links to each other through the positive pole of the first resistance with the first diode, the negative pole of the first diode links to each other with the base stage of NPN type triode, the grounded emitter of NPN type triode, the collector electrode of NPN type triode links to each other with power supply through the second resistance, and the collector electrode of NPN type triode also links to each other with data-out port.
2. forms data bus transmission circuit according to claim 1 is characterized in that, this transmission circuit also comprises the 3rd diode, the plus earth of the 3rd diode, negative pole access forms data bus.
3. forms data bus transmission circuit according to claim 1 and 2 is characterized in that, this transmission circuit also comprises the 5th resistance, an end ground connection of the 5th resistance, other end access forms data bus.
4. forms data bus transmission circuit according to claim 3 is characterized in that, described power supply is+the 5V power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220481282.8U CN202773029U (en) | 2012-09-19 | 2012-09-19 | Single data bus transmitting and receiving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220481282.8U CN202773029U (en) | 2012-09-19 | 2012-09-19 | Single data bus transmitting and receiving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202773029U true CN202773029U (en) | 2013-03-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220481282.8U Expired - Lifetime CN202773029U (en) | 2012-09-19 | 2012-09-19 | Single data bus transmitting and receiving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202773029U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108536629A (en) * | 2018-03-01 | 2018-09-14 | 航天柏克(广东)科技有限公司 | A kind of monobus mostly with or logic transmission circuit communication system and method |
| CN108711456A (en) * | 2018-06-01 | 2018-10-26 | 南通大学附属医院 | A kind of joint replacement patient remote rehabilitation care platform |
| CN110554729A (en) * | 2019-10-09 | 2019-12-10 | 无锡气动技术研究所有限公司 | control circuit and control method for valve island bus single-line data transmission |
-
2012
- 2012-09-19 CN CN201220481282.8U patent/CN202773029U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108536629A (en) * | 2018-03-01 | 2018-09-14 | 航天柏克(广东)科技有限公司 | A kind of monobus mostly with or logic transmission circuit communication system and method |
| CN108536629B (en) * | 2018-03-01 | 2021-02-02 | 航天柏克(广东)科技有限公司 | Communication method of single-bus multi-AND or logic transceiving circuit |
| CN108711456A (en) * | 2018-06-01 | 2018-10-26 | 南通大学附属医院 | A kind of joint replacement patient remote rehabilitation care platform |
| CN110554729A (en) * | 2019-10-09 | 2019-12-10 | 无锡气动技术研究所有限公司 | control circuit and control method for valve island bus single-line data transmission |
| CN110554729B (en) * | 2019-10-09 | 2024-04-12 | 无锡气动技术研究所有限公司 | Control circuit and control method for single-wire data transmission of valve island bus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130306 |