CN105429623A - Signal transmitting circuit, receiving circuit, communication port and power module - Google Patents
Signal transmitting circuit, receiving circuit, communication port and power module Download PDFInfo
- Publication number
- CN105429623A CN105429623A CN201510862653.5A CN201510862653A CN105429623A CN 105429623 A CN105429623 A CN 105429623A CN 201510862653 A CN201510862653 A CN 201510862653A CN 105429623 A CN105429623 A CN 105429623A
- Authority
- CN
- China
- Prior art keywords
- signal
- level
- maintaining part
- triode
- recovery section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Logic Circuits (AREA)
Abstract
The invention discloses a signal transmitting circuit, a signal receiving circuit, a communication port and a power module, relating to the field of communication and being used for solving the problems of short communication distance and poor signal quality or high circuit cost in serial port communication in the prior art. The transmitting circuit comprises a transmitting level holding part and a transmitting power supply, wherein an input end of the transmitting level holding part is connected to a signal source, a holding end of the transmitting level holding part is connected to the transmitting power supply, and an output end of the transmitting level holding part is connected to the ground; and the transmitting level holding part is used for outputting a level signal of the signal source after enhancement through the transmitting power supply or the ground.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of signal sending circuit, receiving circuit, communication port and power module.
Background technology
General serial communication often adopts Transistor-Transistor Logic level, and implementation is fairly simple, but the not enough meter level of communication distance is other, and communication distance is too short; To realize long haul communication, then need to adopt RS485 or RS232 chip, therefore considerably increase cost.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of signal sending circuit, receiving circuit, communication port and power module, and in order to solve in prior art, communication distance in serial communication is short, poor signal quality or the high problem of circuit cost.
The invention provides a kind of signal sending circuit, comprising: transmission level maintaining part and transmission power supply; The input of described transmission level maintaining part is connected with signal source, and the maintenance end of described transmission level maintaining part is connected with described transmission power supply, and output is connected to the ground; Described transmission level maintaining part is used for the level signal of described signal source to strengthen rear output by described transmission power supply or ground.
Optionally, described transmission level maintaining part comprises triode; The input of described transmission level maintaining part is the base stage of described triode, and the maintenance end of described transmission level maintaining part is the emitter of described triode, and the output of described transmission level maintaining part is the collector electrode of described triode.
Optionally, the collector electrode of described triode, is connected to the ground by collector resistance on the one hand, is connected on the other hand by current-limiting resistance with signal sending end.
Optionally, described transmission level maintaining part comprises field effect transistor; The input of described transmission level maintaining part is the grid of described field effect, and the maintenance end of described transmission level maintaining part is the source electrode of described field effect transistor, and the output of described transmission level maintaining part is the drain electrode of described field effect transistor.
On the other hand, the present invention also provides a kind of signal receiving circuit, comprising: incoming level recovery section and reception power supply; The input of described incoming level recovery section is for receiving external level signal, and the output of described incoming level recovery section is connected with described reception power supply, and reset terminal is connected to the ground; Described incoming level recovery section is used for the described external level signal received to strengthen rear output by described reception power supply or ground.
Optionally, described incoming level recovery section comprises triode; The input of described incoming level recovery section is the base stage of described triode, and the output of described incoming level recovery section is the collector electrode of described triode, and the reset terminal of described incoming level recovery section is the emitter of described triode.
Optionally, the collector electrode of described triode, is connected with described reception power supply by collector resistance on the one hand, level signal is exported on the other hand by current-limiting resistance.
Optionally, described incoming level recovery section comprises field effect transistor; The input of described incoming level recovery section is the grid of described field effect, and described incoming level recovery section output is the source electrode of described field effect transistor, and the reset terminal of described incoming level recovery section is the drain electrode of described field effect transistor.
On the other hand, the present invention also provides a kind of communication port, comprises any one signal sending circuit provided by the invention and any one signal receiving circuit.
On the other hand, the present invention also provides a kind of power module, comprises any one communication port provided by the invention.
The signal sending circuit that the embodiment of the present invention provides, receiving circuit, communication port and power module, level signal can be strengthened by transmission level maintaining part and incoming level recovery section respectively, thus effectively improve the antijamming capability of level signal, be conducive to the long range propagation of level signal.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the signal sending circuit that the embodiment of the present invention provides;
Fig. 2 is the another kind of structural representation of the signal sending circuit that the embodiment of the present invention provides;
Fig. 3 is a kind of structural representation of the signal receiving circuit that the embodiment of the present invention provides;
Fig. 4 is the another kind of structural representation of the signal receiving circuit that the embodiment of the present invention provides;
Fig. 5 is the structural representation that communication port that the embodiment of the present invention provides carries out communicating;
Fig. 6 is the comparison diagram of the circuit signal of the circuit signal of communication port provided by the invention and the communication port of prior art when communication distance is greater than 4 meters.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, do not limit the present invention.
As shown in Figure 1, embodiments of the invention provide a kind of signal sending circuit, comprising:
Transmission level maintaining part 1 and transmission power supply 2;
The input 10 of transmission level maintaining part 1 connects with signal source S-phase, and the maintenance end 11 of transmission level maintaining part 1 is connected with transmission power supply 2, and output 12 is connected to the ground;
Transmission level maintaining part 1 is for exporting the level signal of signal source S after sending power supply 2 or ground reinforcement.
The signal sending circuit that the embodiment of the present invention provides, comprises transmission level maintaining part 1 and sends power supply 2; The input 10 of transmission level maintaining part 1 connects with signal source S-phase, and keep end 11 to be connected with transmission power supply 2, output 12 is connected to the ground; The level signal of signal source S can export by transmission level maintaining part 1 after sending power supply 2 or ground reinforcement, thus effectively improves the antijamming capability of level signal, is conducive to the long range propagation of level signal.
Optionally, as shown in Figure 2, transmission level maintaining part 1 can comprise triode P1; The input 10 of transmission level maintaining part 1 can be the base stage of triode P1, and the maintenance end 11 of transmission level maintaining part 1 can be the emitter of triode P1, and the output 12 of transmission level maintaining part 1 can be the collector electrode of triode P1.
In order to enable triode P1 normally work, can three of triode P1 extremely on connect corresponding electric capacity or resistance.Such as, in one embodiment of the invention, the collector electrode of triode P1, is connected to the ground by collector resistance R15 on the one hand, is connected on the other hand by current-limiting resistance R13 with signal sending end TX.Like this, when signal source S sends high level signal (+5V), triode P1 not conducting, then the current collection of P1 very low level (0V), is still low level (0V) through R13 output.When signal source S sends low level (0V), triode P1 conducting, the then current collection of P1 very high level (+5V), the output through R13 is still high level (+5V).Because the emitter of triode P1 is connected with transmission power supply (+5), the level signal that collector electrode exports can effectively be strengthened, therefore, although just contrary with the signal logic of signal source at the signal logic of signal sending end, but the difference between high level and low level is reinforced, namely high level becomes higher, and low level becomes lower.Like this, as long as add one group of reverse logic at signal sending end, or also adopt contrary logic at signal receiving end, just can obtain the logic identical with the signal at signal source S place.
Further, damaging circuit to prevent output level from producing pulse spike, preferably, corresponding clamp diode can also be added at signal output part, as the D1 in Fig. 2, D3.
It should be noted that, in the present embodiment, the power supply that triode P1 connects is+5V power supply, and therefore, what triode adopted is P type pipe, but embodiments of the invention are not limited thereto.In other embodiments of the invention, if the power supply used is negative voltage power supply, then N-type pipe can be used.
Except triode, transmission level maintaining part 1 can also adopt field effect transistor to strengthen to realize level, now, the input 10 of transmission level maintaining part 1 can be the grid of field effect, the maintenance end 11 of transmission level maintaining part 1 can be the source electrode of field effect transistor, and the output 12 of transmission level maintaining part 1 can be the drain electrode of field effect transistor.
Accordingly, as shown in Figure 3, embodiments of the invention also provide a kind of signal receiving circuit, comprising:
Incoming level recovery section 3 and reception power supply 4; The input 30 of incoming level recovery section 3 is for receiving external level signal, and the output 31 of incoming level recovery section 3 is connected with reception power supply 4, and reset terminal 32 is connected to the ground; Incoming level recovery section 3 exports after receiving power supply 4 or ground reinforcement for the external level signal that will receive.
The signal receiving circuit that the embodiment of the present invention provides, comprises incoming level recovery section 3 and receives power supply 4; The input 30 of incoming level recovery section 3 is for receiving external level signal, and output 31 is connected with reception power supply 4, and reset terminal 32 is connected to the ground; The external level signal received can export by incoming level recovery section 3 after receiving power supply 4 or ground reinforcement, thus effectively improves the antijamming capability of level signal, is conducive to the long range propagation of level signal.
Optionally, as shown in Figure 4, in one embodiment of the invention, incoming level recovery section 3 can comprise triode N1; The input 30 of incoming level recovery section 3 is the base stage of triode N1, and the output 31 of incoming level recovery section 30 is the collector electrode of triode N1, and the reset terminal 32 of incoming level recovery section 30 is the emitter of triode N1.
In order to enable triode N1 normally work, can three of triode N1 extremely on connect corresponding electric capacity or resistance.Such as, at the collector electrode of triode N1, can be connected with reception power supply by collector resistance R9 on the one hand, by current-limiting resistance R10, level signal can be exported on the other hand.
Further, damaging circuit devcie to prevent the external level signal received from producing pulse spike, preferably, corresponding clamp diode can also be added at signal receiving end, as the D2 in Fig. 4.
It should be noted that, in the present embodiment, the power supply that triode N1 connects is+5V power supply, and therefore, what triode adopted is N-type pipe, but embodiments of the invention are not limited thereto.In other embodiments of the invention, if the power supply used is negative voltage power supply, then P type pipe can be used.
Except triode, receiving power up portion 3 can also adopt field effect transistor to strengthen to realize level, now, the input 30 receiving power up portion 3 can be the grid of field effect, the output 31 receiving power up portion 3 can be the source electrode of field effect transistor, and the reset terminal 32 receiving power up portion 3 can be the drain electrode of field effect transistor.
Accordingly, embodiments of the invention also provide a kind of communication port, comprise any one signal sending circuit and any one signal receiving circuit that previous embodiment provides.The communication port that the present embodiment provides, owing to being provided with above-mentioned two kinds of circuit, thus can carry out the duplex communication sending and receive simultaneously.
Illustrate, as shown in Figure 5, the communication port that the present embodiment provides can realize the serial communication (Transistor-Transistor Logic level) of long haul communication.Wherein, left side is the display panel of television set, and right side is power panel.Communication is connected by long connecting line between display panel and power panel.
Specifically, when display panel TX1 holds transmission high level (+5V), triode P1 not conducting, then the current collection of P1 very low level (0V), is still low level (0V) through R13 output, connect through plug terminal CN3 and CN4, the output of the R12 on power panel is low level (0V), then the base stage no current of triode N1, triode N1 not conducting, RX2 end, through resistance R9 pull-up, exports as high level (+5V); When display panel TX1 holds transmission low level (0V), triode P1 conducting, the then current collection of P1 very high level (+5V), output through R13 is still high level (+5V), connect through plug terminal CN3 and CN4, the output of the R12 on power panel is high level (+5V), then triode N1 conducting, the collector electrode of N1 exports as low level (0V), therefore C3 end exports as low level (0V); Otherwise when power panel TX2 holds the high or low level of transmission, display panel RX1 end just receives high or low level.
The communication port that the embodiment of the present invention provides, circuit forms primarily of triode, resistance, electric capacity and diode, the ingenious characteristic of triode that utilizes realizes telecommunication (at least can reach 4m), level can not be decayed, relative to the circuit adopting RS485 or RS232 chip to realize long haul communication, cost is much lower, simple and practical.
Fig. 6 is the comparison diagram of the circuit signal of the circuit signal of communication port provided by the invention and the communication port of prior art when communication distance is greater than 4 meters.Wherein, the circuit signal of the communication port that Fig. 6 (a) is prior art, Fig. 6 (b) is the circuit signal of communication port provided by the invention.Visible, the signal quality of the communication port that the embodiment of the present invention provides has had and has significantly improved.
Accordingly, embodiments of the invention also provide a kind of power module, and this power module comprises the present embodiment provides communication port, therefore also can realize corresponding beneficial effect, be described in detail above, repeat no more herein.
Although be example object, disclose the preferred embodiments of the present invention, it is also possible for those skilled in the art will recognize various improvement, increase and replacement, and therefore, scope of the present invention should be not limited to above-described embodiment.
Claims (10)
1. a signal sending circuit, is characterized in that, comprising:
Transmission level maintaining part and transmission power supply;
The input of described transmission level maintaining part is connected with signal source, and the maintenance end of described transmission level maintaining part is connected with described transmission power supply, and output is connected to the ground;
Described transmission level maintaining part is used for the level signal of described signal source to strengthen rear output by described transmission power supply or ground.
2. circuit according to claim 1, is characterized in that, described transmission level maintaining part comprises triode; The input of described transmission level maintaining part is the base stage of described triode, and the maintenance end of described transmission level maintaining part is the emitter of described triode, and the output of described transmission level maintaining part is the collector electrode of described triode.
3. circuit according to claim 2, is characterized in that, the collector electrode of described triode, is connected to the ground on the one hand by collector resistance, is connected on the other hand by current-limiting resistance with signal sending end.
4. circuit according to claim 1, is characterized in that, described transmission level maintaining part comprises field effect transistor; The input of described transmission level maintaining part is the grid of described field effect, and the maintenance end of described transmission level maintaining part is the source electrode of described field effect transistor, and the output of described transmission level maintaining part is the drain electrode of described field effect transistor.
5. a signal receiving circuit, is characterized in that, comprising:
Incoming level recovery section and reception power supply;
The input of described incoming level recovery section is for receiving external level signal, and the output of described incoming level recovery section is connected with described reception power supply, and reset terminal is connected to the ground; Described incoming level recovery section is used for the described external level signal received to strengthen rear output by described reception power supply or ground.
6. circuit according to claim 5, is characterized in that, described incoming level recovery section comprises triode; The input of described incoming level recovery section is the base stage of described triode, and the output of described incoming level recovery section is the collector electrode of described triode, and the reset terminal of described incoming level recovery section is the emitter of described triode.
7. circuit according to claim 6, is characterized in that, the collector electrode of described triode, is connected on the one hand by collector resistance with described reception power supply, level signal is exported on the other hand by current-limiting resistance.
8. circuit according to claim 5, is characterized in that, described incoming level recovery section comprises field effect transistor; The input of described incoming level recovery section is the grid of described field effect, and the reset terminal of described incoming level recovery section is the source electrode of described field effect transistor, and the output of described incoming level recovery section is the drain electrode of described field effect transistor.
9. a communication port, is characterized in that, comprises the signal sending circuit according to any one of Claims 1-4 and the signal receiving circuit according to any one of claim 5 to 8.
10. a power module, is characterized in that, comprises communication port according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510862653.5A CN105429623A (en) | 2015-11-30 | 2015-11-30 | Signal transmitting circuit, receiving circuit, communication port and power module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510862653.5A CN105429623A (en) | 2015-11-30 | 2015-11-30 | Signal transmitting circuit, receiving circuit, communication port and power module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105429623A true CN105429623A (en) | 2016-03-23 |
Family
ID=55507594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510862653.5A Pending CN105429623A (en) | 2015-11-30 | 2015-11-30 | Signal transmitting circuit, receiving circuit, communication port and power module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105429623A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2909732Y (en) * | 2006-06-28 | 2007-06-06 | 海信集团有限公司 | Liquid crystal TV. set capable of removing screen flash when cut-off |
| CN201063703Y (en) * | 2007-06-26 | 2008-05-21 | 深圳键桥通讯技术股份有限公司 | Intelligent card communication circuit of set up box |
| CN201387611Y (en) * | 2008-10-23 | 2010-01-20 | 盛惠珍 | Radio-frequency card reader-writer communication circuit |
| CN201583672U (en) * | 2010-01-05 | 2010-09-15 | 深圳市德泽能源科技有限公司 | Anti-interference photo sensor circuit |
| CN103488350A (en) * | 2013-08-27 | 2014-01-01 | 合肥工业大学 | Hardware driving method suitable for large-sized infrared touch screen |
| CN204498100U (en) * | 2015-05-08 | 2015-07-22 | 北京联合大学 | The communication bus interface circuit of electric life controller |
-
2015
- 2015-11-30 CN CN201510862653.5A patent/CN105429623A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2909732Y (en) * | 2006-06-28 | 2007-06-06 | 海信集团有限公司 | Liquid crystal TV. set capable of removing screen flash when cut-off |
| CN201063703Y (en) * | 2007-06-26 | 2008-05-21 | 深圳键桥通讯技术股份有限公司 | Intelligent card communication circuit of set up box |
| CN201387611Y (en) * | 2008-10-23 | 2010-01-20 | 盛惠珍 | Radio-frequency card reader-writer communication circuit |
| CN201583672U (en) * | 2010-01-05 | 2010-09-15 | 深圳市德泽能源科技有限公司 | Anti-interference photo sensor circuit |
| CN103488350A (en) * | 2013-08-27 | 2014-01-01 | 合肥工业大学 | Hardware driving method suitable for large-sized infrared touch screen |
| CN204498100U (en) * | 2015-05-08 | 2015-07-22 | 北京联合大学 | The communication bus interface circuit of electric life controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203444468U (en) | Communication convertor | |
| CN203933593U (en) | Half-duplex RS-485 isolation communicating circuit | |
| CN106941349A (en) | A kind of low delay optical coupling isolation circuit and RS485 isolate telecommunication circuit | |
| CN105471420A (en) | Differential I2C bus communication interface circuit | |
| CN205142203U (en) | Automatic transceiver circuits of RS485 | |
| CN205142257U (en) | 485 communication interface circuit of two compatible opto -couplers and control of three opto -couplers | |
| CN210490838U (en) | Isolated communication circuit and system | |
| CN210402335U (en) | RS485 and RS232 multiplexing serial port communication circuit with isolation | |
| CN204790997U (en) | A general circuit for electronic equipment RS -485RS -422 communication | |
| CN201414124Y (en) | Isolation RS485 communication speed-raising circuit for low-speed optical coupler | |
| CN205142206U (en) | Switch circuit of communication direction | |
| CN204206152U (en) | A kind of difference I2C bus communication interface circuit | |
| CN202995715U (en) | Low-cost single-data-line asynchronous serial communication circuit | |
| CN203445871U (en) | RS485 communication circuit | |
| CN105429623A (en) | Signal transmitting circuit, receiving circuit, communication port and power module | |
| CN203661030U (en) | Electrical level switching circuit and circuit board having same | |
| CN206322174U (en) | One kind accelerates three light-coupled isolation type RS485 circuits | |
| CN202267960U (en) | Debugging device for universal asynchronous receiver/transmitter | |
| CN213754540U (en) | Single-bus communication circuit | |
| CN202025203U (en) | Feeding type communication circuit | |
| CN204965416U (en) | RS485 bus serial ports device | |
| CN210466075U (en) | Information acquisition and control device for clothes hanger hanging system | |
| CN202126687U (en) | RS485 bus interface circuit | |
| CN203054078U (en) | Nonpolar 485 communication circuit suitable for electric energy meter | |
| CN204117347U (en) | The device that a kind of on-the-spot ammeter based on mobile phone and electric power terminal are safeguarded |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160323 |