CN207720114U - A kind of level shifting circuit and interface multiplexing circuit - Google Patents
A kind of level shifting circuit and interface multiplexing circuit Download PDFInfo
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- CN207720114U CN207720114U CN201721912384.XU CN201721912384U CN207720114U CN 207720114 U CN207720114 U CN 207720114U CN 201721912384 U CN201721912384 U CN 201721912384U CN 207720114 U CN207720114 U CN 207720114U
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Abstract
The utility model discloses a kind of level shifting circuit and interface multiplexing circuit, level shifting circuit is set between signal input part and signal output end, including electric power driving module and switch module；When signal input part exports low level, switch module conducting, signal output end exports low level；When signal input part exports high level, switch module disconnects, and signal output end exports high level.Level shifting circuit realizes the level conversion of pulse electrical signal.Interface multiplexing circuit, including a multiplexed signals end, at least one level shifting circuit module and at least one signal extension end, multiplexed signals end and signal extension end are used for signal input and output.Interface multiplexing circuit realizes the function that the pulse voltage signal of a signal input part is sent to multiple signal output ends, in the case where not increasing Multi-serial port MCU chip, realizes interface duplex, reduces manufacturing cost and convenient for safeguarding in the future.
Description
Technical field
The utility model is related to electronic apparatus technical field, especially level conversions and interface multiplexing circuit field.
Background technology
In electronic and electrical equipment, data are transmitted by data-interface between data acquisition module and data processing module.
With the intelligence of electric equipment products, multifunction, the data for more and more data acquisition modules occur are sent
To the demand of different data processing module, but not only data-interface is limited, and the input signal of different data processing module
Pulse voltage is different, and existing solution, which generally uses Multi-serial port MCU and adds hardware circuit, further expands data-interface
Quantity, but this mode increases hardware cost, and increase later maintenance workload.
Utility model content
In order to solve the above-mentioned technical problem, the purpose of this utility model is to provide a kind of level shifting circuit and interface duplex
Circuit, level shifting circuit are used to be converted to the pulse voltage electric signal that one inputs the pulse of another different voltage value
Voltage signal, interface multiplexing circuit is used to a pulse voltage signal being converted into multiple pulse voltage signals, above-mentioned to solve
The problems in technical background.
Technical solution used by the utility model is：
A kind of level shifting circuit, level shifting circuit are set between signal input part and signal output end, including electricity
Source drive module and switch module；Signal input part is connect with switch module input terminal, and the output end and signal of switch module are defeated
The input terminal connection of outlet, electric power driving module, the output end of electric power driving module are connect with signal output end；Signal input part
When exporting low level, switch module conducting, signal output end exports low level；When signal input part exports high level, switching molding
Block disconnects, and signal output end exports high level.
Switch module includes the first power supply, first resistor and the first triode；
The emitter of first triode is connect with signal input part, and the base stage of the first triode and one end of first resistor connect
It connects, the other end of first resistor is connect with the first power supply, the output end of the collector of first triode as switch module.
Electric power driving module includes second source and second resistance, and one end of the second resistance connects second source, the
Output end of the other end of two resistance as electric power driving module.
In addition the invention also provides a kind of interface multiplexing circuits, including a multiplexed signals end, at least one level to turn
Circuit module and at least one signal extension end are changed, the multiplexed signals end and the signal extension end input defeated for signal
Go out.
One level shifting circuit module corresponds to a signal extension end, and level shifting circuit module turns including the first level
Circuit and/or second electrical level conversion circuit are changed, multiplexed signals end is connect with the input terminal of the first level shifting circuit, signal extension
End is connect with the output end of the first level shifting circuit；The signal extension end and the input terminal of second electrical level conversion circuit connect
It connects, multiplexed signals end is connect with the output end of second electrical level conversion circuit.
The utility model has the beneficial effects that：Level shifting circuit is passed through by switch module voltage pulse output signal
The voltage of the high level signal of input signal is transformed into preset voltage value by electric power driving module, realizes the electricity of pulse signal
Flat turn is changed；Interface multiplexing circuit is realized a pulse voltage signal, is converted into more by the parallel connection of multiple level shifting circuits
The pulse voltage signal of a preset voltage, realizes the interface duplex without increasing chip, reduces circuit
Cost, and convenient for safeguarding in the future.
Description of the drawings
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings：
Fig. 1 is a kind of structural schematic diagram of a specific embodiment of level shifting circuit of the utility model；
Fig. 2 is an a kind of specific embodiment circuit diagram of level shifting circuit of the utility model；
Fig. 3 is a kind of another specific embodiment circuit diagram of level shifting circuit of the utility model；
Fig. 4 is a kind of structural schematic diagram of a specific embodiment of interface multiplexing circuit of the utility model.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
As shown in Figure 1, in one embodiment level shifting circuit 1 be set to signal input part and signal output end it
Between, level shifting circuit includes switch module 2 and electric power driving module 3；Signal input part is connect with 2 input terminal of switch module,
The output end of switch module 2 is connect with the input terminal of signal output end, electric power driving module 3, power module drive module 3 it is defeated
Outlet is connect with signal output end.When signal input part exports low level, switch module 2 is connected, and signal output end exports low electricity
It is flat；When signal input part exports high level, switch module 2 disconnects, and electric power driving module 3 is connected, the high electricity of signal output end output
It is flat.
As shown in Fig. 2, the input terminal connection signal input terminal MCU_PM_TXD of switch module, the output end of switch module connects
Meet signal output end LED_RXD.Switch module includes the first triode Q1, first resistor R1 and the first power supply VA (3.0V), the
One end of one resistance R1 is connect with the first power supply VA (3.0V), the base stage B of the other end of first resistor R1 and the first triode Q1
Connection, the emitter E of the first triode Q1 are connect with input signal, and the collector C of the first triode Q1 is as switch module
Output end, switch module are used for electric power driving module short circuit, the output end output of switching circuit when receiving low level signal
Low level signal ends input end signal when receiving high level signal.
Electric power driving module includes second source VB (5V) and second resistance R2, one end connection second of second resistance R2
Output end LED_RXD of the other end of power supply VB (5V), second resistance R2 as electric power driving module, electric power driving module are used for
By the high level setting of the cyclic pulse signal of output to preset voltage value (voltage value for being equal to second source).
The specific course of work is as follows：
Input signal MCU_PM_TXD is pulse signal, when input signal MCU_PM_TXD is low level, the one or three pole
Pipe Q1 conductings, second source VB are short-circuited, and output signal LED_RXD is low level signal.When input signal MCU_PM_TXD is
When high level, the first triode Q1 cut-off, the voltage output of second source VB to output signal LED_RXD, output signal LED_
RXD exports high ordinary mail number (5V).
Input signal MCU_PM_TXD is converted into output signal LED_RXD, output signal and input by level shifting circuit
The information that signal includes is identical, and only the voltage of high level signal is different.
In another embodiment, as shown in figure 3, switch module includes the second triode Q2,3rd resistor R3, third electricity
One end of source VC (3V) and the 4th resistance R4,3rd resistor are connect with third power supply VC (3V), the other end of 3rd resistor with it is defeated
Enter signal MCU_PM_TXD connections, one end of the 4th resistance R4 is connect with third power supply V3, the other end of the 4th resistance R4 and
The base stage B connections of two triode Q2, the emitter E of the second triode Q2 are connect with input signal MCU_PM_TXD, the two or three pole
Output ends of the collector C of pipe Q2 as switch module.
Electric power driving module includes the 4th power vd (3.3V) and the 5th resistance R5, one end connection the 4th of the 5th resistance R5
Power vd (3.3V), the output end of the other end of the 5th resistance R5 as electric power driving module.
Obvious, when input signal MCU_PM_TXD is low level, the second triode Q2 conductings, output signal PM_RXD
For low level signal.When input signal MCU_PM_TXD is high level, the second triode Q2 ends, and output signal PM_RXD is
High level signal (3.3V).
Input signal MCU_PM_TXD is converted into output signal PM_RXD by level shifting circuit, output signal and
The information that input signal includes is identical, and only the voltage of high level signal is different.
In another embodiment, as shown in figure 4, interface multiplexing circuit, including multiplexed signals end, level shifting circuit mould
Block 1, level shifting circuit module 2 ... level shifting circuit module N, signal extension end 1, signal extension end 2 ... signal expand
End N is opened up, level shifting circuit module 1 includes level shifting circuit 1 and level shifting circuit 1N, and level shifting circuit module 2 is wrapped
It includes that level shifting circuit N and level turn to include level shifting circuit 2 and level shifting circuit 2N ... level shifting circuit modules N
Circuit NN is changed, a level shifting circuit module corresponds to a signal extension end.Multiplexed signals end and level shifting circuit 1, electricity
The input terminal of flat conversion circuit 2 ... level shifting circuit N connects, signal extension end 1, signal extension end 2 ... signal extension
End N is connect with the output end of level shifting circuit 1, level shifting circuit 2 ... level shifting circuit N；Signal extension end 1, letter
Number extension end 2 ... signal extension end N and level shifting circuit 1N, level shifting circuit 2N ... level shifting circuits NN it is defeated
Enter end connection, level shifting circuit 1N, the output end of level shifting circuit 2N ... level shifting circuits NN and multiplexed signals end
Connection.
When multiplexed signals end voltage pulse output signal, turned by the level shifting circuit 1 of interface multiplexing circuit, level
One pulse voltage signal at multiplexed signals end is converted into N number of arteries and veins at signal extension end by the level shifting circuit N that changes circuit 2 ...
Voltage signal is rushed, the high tension voltage of N number of pulse voltage signal is determined by the electric power driving module of level shifting circuit.
Pulse voltage signal in multiplexed signals end identifies the information needed for each output end, signal extension by identification code
After termination receives pulse voltage signal, by the information needed for identification code screening, the effect of interface duplex is realized.
It is obvious, signal extension end 1, signal extension end 2 ... signal extension end N can also voltage pulse output signal 1,
Pulse voltage signal 2 ... pulse voltage signal N passes through level shifting circuit 1N, level shifting circuit 2N ... level conversions
Pulse voltage signal is transmitted to multiplexed signals end, the signal that multiplexed signals end will be received according to time-sharing multiplex principle by circuit NN
Carry out classification processing.
It is to be illustrated to the preferable implementation of the utility model, but the invention is not limited to the reality above
Example is applied, those skilled in the art can also make various equivalent variations without departing from the spirit of the present invention
Or replace, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (4)
1. a kind of level shifting circuit, the level shifting circuit is set between signal input part and signal output end, special
Sign is that the level shifting circuit includes electric power driving module and switch module；The signal input part and switch module are defeated
Enter end connection, the output end of the switch module is connect with the input terminal of signal output end, electric power driving module, and the power supply drives
The output end of dynamic model block is connect with signal output end；When the signal input part output low level, the switch module conducting, institute
State signal output end output low level；When the signal input part output high level, the switch module disconnects, and the signal is defeated
Outlet exports high level.
2. a kind of level shifting circuit according to claim 1, which is characterized in that the switch module includes the first electricity
Source, first resistor and the first triode；
The emitter of first triode is connect with signal input part, and the base stage of the first triode and one end of first resistor connect,
The other end of first resistor is connect with the first power supply, the output end of the collector of first triode as switch module.
3. a kind of level shifting circuit according to claim 1, which is characterized in that the electric power driving module includes second
One end of power supply and second resistance, the second resistance connects second source, and the other end of second resistance is as power drives mould
The output end of block.
4. a kind of interface multiplexing circuit, which is characterized in that including a multiplexed signals end, at least one level shifting circuit module
With at least one signal extension end, the multiplexed signals end and the signal extension end are used for signal input and output,
One level shifting circuit module corresponds to one signal extension end, and level shifting circuit module includes the first electricity
Flat conversion circuit and/or second electrical level conversion circuit, the first level shifting circuit and/or second electrical level conversion circuit are wanted for right
1 to 3 any one of them level shifting circuit, the multiplexed signals end is asked to be connect with the input terminal of the first level shifting circuit,
The signal extension end is connect with the output end of the first level shifting circuit；The signal extension end and second electrical level conversion circuit
Input terminal connection, the multiplexed signals end is connect with the output end of second electrical level conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721912384.XU CN207720114U (en) | 2017-12-30 | 2017-12-30 | A kind of level shifting circuit and interface multiplexing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721912384.XU CN207720114U (en) | 2017-12-30 | 2017-12-30 | A kind of level shifting circuit and interface multiplexing circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207720114U true CN207720114U (en) | 2018-08-10 |
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| CN201721912384.XU Active CN207720114U (en) | 2017-12-30 | 2017-12-30 | A kind of level shifting circuit and interface multiplexing circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356739A (en) * | 2018-12-10 | 2019-02-19 | 重庆红江机械有限责任公司 | Engine intelligent Modular electrical sub-controller |
| CN109582620A (en) * | 2018-12-21 | 2019-04-05 | 郑州云海信息技术有限公司 | A kind of UART interface conversion equipment and interface conversion method |
| CN111737069A (en) * | 2020-06-19 | 2020-10-02 | 浪潮(北京)电子信息产业有限公司 | Debugging circuit, development board, debugging method and equipment |
-
2017
- 2017-12-30 CN CN201721912384.XU patent/CN207720114U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356739A (en) * | 2018-12-10 | 2019-02-19 | 重庆红江机械有限责任公司 | Engine intelligent Modular electrical sub-controller |
| CN109582620A (en) * | 2018-12-21 | 2019-04-05 | 郑州云海信息技术有限公司 | A kind of UART interface conversion equipment and interface conversion method |
| CN109582620B (en) * | 2018-12-21 | 2021-11-26 | 郑州云海信息技术有限公司 | UART interface conversion device and method |
| CN111737069A (en) * | 2020-06-19 | 2020-10-02 | 浪潮(北京)电子信息产业有限公司 | Debugging circuit, development board, debugging method and equipment |
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