CN202334305U - Circuit for extending communication distances in electronic circuit - Google Patents
Circuit for extending communication distances in electronic circuit Download PDFInfo
- Publication number
- CN202334305U CN202334305U CN201120440756XU CN201120440756U CN202334305U CN 202334305 U CN202334305 U CN 202334305U CN 201120440756X U CN201120440756X U CN 201120440756XU CN 201120440756 U CN201120440756 U CN 201120440756U CN 202334305 U CN202334305 U CN 202334305U
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- resistance
- triode
- audion
- circuit
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Abstract
The utility model relates to a circuit for extending communication distances in an electronic circuit, which is characterized by comprising a first audion to a fourth audion and a first resistance to a sixth resistance, wherein a base electrode of the first audion is the output end IN; the two ends of the first resistance are respectively connected between an emitting electrode and the base electrode of the first audion, and the emitting electrode of the first audion is grounded; one end of the second resistance is connected with a direct current working power supply VCC, and the other end is respectively connected with a collecting electrode of the first audion and one end of the third resistance, and the other end of the third resistance is connected with a base electrode of the second audion; an emitting electrode of the second audion and a collecting electrode of the third audion are connected with the direct current working power supply VCC, a collecting electrode of the second audion is grounded through the fourth resistance; one end of the fifth resistance is connected with a collecting electrode of the second audion, and the other end is respectively connected with a base electrode of the third audion and a base electrode of the fourth audion, an emitting electrode of the third audion and an emitting electrode of the fourth audion are connected with each other and one end of the sixth resistance, the base electrode of the fourth audion is grounded and the other end of the sixth resistance is the output end OUT. The circuit for extending communication distances in an electronic circuit has the advantages of being long in transmission distance which can reach 20 meters, low in cost, simple in electronic circuit structure and the like.
Description
Technical field
The utility model relates to the circuit that prolongs communication distance in a kind of electronic circuit.
Background technology
Telecommunication circuits such as the SPI that uses of electronic circuit, UART connect usually and see Fig. 1 in the market, and two master chips directly connect the IO mouth of master chip through a resistance (R1).Sort circuit is because the chip I mouth adopts is Transistor-Transistor Logic level, and the common driving force of IO mouth of chip very a little less than, have only in 10 milliamperes, so communication distance is in 20cm.Need grow distance at some, surpass the place of 10 meters distances, this application just needs to use circuit such as professional drive circuit or employing electric current loop, and system cost also can increase greatly like this.
Summary of the invention
The utility model purpose is to provide a kind of circuit cheaply, and after increasing this circuit on the basis of original circuit, communication distance is increased to the circuit that prolongs communication distance in 20 meters the electronic circuit.
In order to achieve the above object, the technical scheme of the utility model is: prolong the circuit of communication distance in a kind of electronic circuit, it is characterized in that comprising first triode to the, four triodes and six resistance of first resistance to the; The base stage of wherein said first triode is input IN; The two ends of said first resistance are connected between the emitter and base stage of first triode, the grounded emitter of said first triode; One termination dc supply VCC of said second resistance, the collector electrode of other end difference first triode and an end of the 3rd resistance, the base stage of another termination second triode of said the 3rd resistance; The collector electrode of the emitter of said second triode and the 3rd triode meets dc supply VCC, and the collector electrode of second triode is through the 4th grounding through resistance; One end of said the 5th resistance connects the collector electrode of second triode, and the other end connects the base stage of the 3rd triode and the base stage of the 4th triode respectively; The emission collection of the emitter of said the 3rd triode and the 4th triode is connected and connects an end of the 6th resistance, the grounded collector of said the 4th triode, and the other end of said the 6th resistance is output OUT.
The utility model advantage compared with prior art is: long transmission distance, can reach 20 meters, and cost is low, and circuit is simple.
Description of drawings
Fig. 1 is the connected mode figure of telecommunication circuits such as the SPI that uses of existing electronic circuit, UART;
Fig. 2 is the schematic block circuit diagram of the utility model;
Fig. 3 is the electrical schematic diagram of the use of the utility model on certain air-conditioning display circuit.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is done further detailed explanation.
As shown in Figure 2, the circuit of prolongation communication distance in a kind of electronic circuit, the utility model characteristics are to comprise that the first triode Q1 to the, the four triode Q4 and first resistance R 1 are to the 6th resistance R 6; The base stage of the wherein said first triode Q1 is input IN; The two ends of said first resistance R 1 are connected between the emitter and base stage of the first triode Q1, the grounded emitter of the said first triode Q1; One termination dc supply VCC of said second resistance R 2, the collector electrode of the other end difference first triode Q1 and an end of the 3rd resistance R 3, the base stage of another termination second triode Q2 of said the 3rd resistance R 3; The collector electrode of the emitter of the said second triode Q2 and the 3rd triode Q3 meets dc supply VCC, and the collector electrode of the second triode Q2 is through the 4th resistance R 4 ground connection; One end of said the 5th resistance R 5 connects the collector electrode of the second triode Q2, and the other end connects the base stage of the 3rd triode Q3 and the base stage of the 4th triode Q4 respectively; The emitter of said the 3rd triode Q3 and the emission collection of the 4th triode Q4 are connected and connect an end of the 6th resistance R 6, the grounded collector of said the 4th triode Q3, and the other end of said the 6th resistance R 6 is output OUT.
Its operation principle is: first resistance R 1, second resistance R 2 and the first triode Q1 form a negative circuit, at high level of input IN input, and the then first triode Q1 conducting, low level of collector electrode output of the first triode Q1; The 3rd resistance R 3, the 4th resistance R 4 and the second triode Q2 form the another one see-saw circuit, at the current collection of first triode Q1 low level very, the then second triode Q2 conducting, high level of collector electrode output.Through the amplification of the first triode Q1 and the second triode Q2, the Transistor-Transistor Logic level signal driving force of importing from input IN obtains amplifying.The 5th resistance R 5, the 3rd triode Q1 and current-amplifying driving circuit of the 4th triode Q1 recomposition; When the 5th resistance R 5 one ends are high level; The emitter of the 3rd triode Q3 is also exported high level; On the contrary, when the 5th resistance R 5 one ends are low level, the emission of the 3rd triode Q3 collects also output low level.
As shown in Figure 3; It is the application of circuit in the air-conditioning electric-control system that prolongs communication distance in a kind of electronic circuit: the signal of communication of output two road Transistor-Transistor Logic levels on the air-conditioning master control borad; One the tunnel is the CLOCK signal; One the tunnel is the DATA signal, and the DATA pin of master control borad meets the input IN that prolongs the circuit of communication distance in a kind of electronic circuit of the first via, and output OUT connects the DATA pin of air-conditioning display panel; The CLOCK pin of master control borad meets the input IN that prolongs the circuit of communication distance in the second tunnel a kind of electronic circuit, and output OUT connects the CLOCK pin of air-conditioning display panel.Through the circuit of prolongation communication distance in a kind of electronic circuit of increase two-way, thereby will have only the display panel of 20cm communication distance to extend to 20 meters originally.
Claims (1)
1. prolong the circuit of communication distance in the electronic circuit, it is characterized in that comprising that first triode (Q1) to the 4th triode (Q4) and first resistance (R1) are to the 6th resistance (R6); The base stage of wherein said first triode (Q1) is input IN; The two ends of said first resistance (R1) are connected between the emitter and base stage of first triode (Q1), the grounded emitter of said first triode (Q1); One termination dc supply VCC of said second resistance (R2), the collector electrode of other end difference first triode (Q1) and an end of the 3rd resistance (R3), the base stage of another termination second triode (Q2) of said the 3rd resistance (R3); The collector electrode of the emitter of said second triode (Q2) and the 3rd triode (Q3) meets dc supply VCC, and the collector electrode of second triode (Q2) is through the 4th resistance (R4) ground connection; One end of said the 5th resistance (R5) connects the collector electrode of second triode (Q2), and the other end connects the base stage of the 3rd triode (Q3) and the base stage of the 4th triode (Q4) respectively; The emitter of said the 3rd triode (Q3) and the emission collection of the 4th triode (Q4) are connected and connect an end of the 6th resistance (R6), the grounded collector of said the 4th triode (Q3), and the other end of said the 6th resistance (R6) is output OUT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120440756XU CN202334305U (en) | 2011-11-09 | 2011-11-09 | Circuit for extending communication distances in electronic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120440756XU CN202334305U (en) | 2011-11-09 | 2011-11-09 | Circuit for extending communication distances in electronic circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202334305U true CN202334305U (en) | 2012-07-11 |
Family
ID=46446270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120440756XU Expired - Lifetime CN202334305U (en) | 2011-11-09 | 2011-11-09 | Circuit for extending communication distances in electronic circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202334305U (en) |
-
2011
- 2011-11-09 CN CN201120440756XU patent/CN202334305U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131129 Address after: 528311 Guangdong, Foshan, Beijiao, the United States, the United States and the United States on the avenue of the United States, the headquarters of the United States building B floor, District, 26-28 Patentee after: Midea Group Co., Ltd. Address before: 528311 Beijiao, Foshan, Shunde District, the town of Guangdong, the United States Avenue, No. 6 Patentee before: Meidi Electric Appliances Co., Ltd., Guangdong |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: WUHU MEIZHI AIR CONDITIONING EQUIPMENT CO., LTD. Assignor: Midea Group Co., Ltd. Contract record no.: 2014440000237 Denomination of utility model: Circuit for extending communication distances in electronic circuit Granted publication date: 20120711 License type: Exclusive License Record date: 20140528 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |