CN208924207U - A kind of digital simulation multiplexing input detecting circuit - Google Patents
A kind of digital simulation multiplexing input detecting circuit Download PDFInfo
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- CN208924207U CN208924207U CN201821522433.3U CN201821522433U CN208924207U CN 208924207 U CN208924207 U CN 208924207U CN 201821522433 U CN201821522433 U CN 201821522433U CN 208924207 U CN208924207 U CN 208924207U
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- 238000004088 simulation Methods 0.000 title claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims abstract description 43
- 230000005611 electricity Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
The utility model provides a kind of digital simulation multiplexing input detecting circuit, the input detecting circuit includes Electro Magnetic Compatibility EMC capacitor, series resistance, filter capacitor, pull-up resistor and pull down resistor, wherein EMC capacitor one end connects the input terminal of the input detecting circuit, other end ground connection；One end of the series resistance is connected with the EMC capacitor, and the other end is connected with one end of the filter capacitor, the other end ground connection of the filter capacitor；One end of the pull-up resistor is connected with the supply voltage end of the input detecting circuit, and the other end is connected with the EMC capacitor；One end of the pull down resistor is connected with the EMC capacitor, other end ground connection.By the utility model, solve the problems, such as that existing input detecting circuit reusability is not strong, level conversion is at high cost or does not have Electro Magnetic Compatibility and anti-momentary pulse function.
Description
Technical field
The utility model relates to electronic circuit technology fields more particularly to a kind of digital simulation to be multiplexed input detecting circuit.
Background technique
It is provided with input detecting circuit on the input/output port of entire car controller or other vehicle electronic control units,
The input detecting circuit is usually converted by the digital level that triode or metal-oxide-semiconductor are built, this circuit, which also needs to increase electrostatic, to be released
(Electro-Static discharge, ESD) protection pipe is put to realize that Electro Magnetic Compatibility is protected, then passes through special level
Conversion chip realizes that aforesaid way level conversion is at high cost and digital signal detection and analog signal detection circuit cannot lead to
With reusability is not strong；In the prior art, also have and level translation may be implemented by the circuit of resistance and capacitor formation, but not
Have Electro Magnetic Compatibility and anti-momentary pulse function.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of digital simulation multiplexing input detecting circuit, to solve
Existing input detecting circuit reusability is not strong, level conversion is at high cost or does not have Electro Magnetic Compatibility and anti-momentary pulse
The problem of function.
A kind of digital simulation provided by the utility model is multiplexed input detecting circuit, and the input detecting circuit includes electromagnetism
Compatible EMC capacitor, series resistance, filter capacitor, pull-up resistor and pull down resistor, in which:
EMC capacitor one end connects the input terminal of the input detecting circuit, other end ground connection；
One end of the series resistance is connected with the EMC capacitor, and the other end is connected with one end of the filter capacitor；Institute
State the other end ground connection of filter capacitor；
One end of the pull-up resistor is connected with the supply voltage end of the input detecting circuit, the other end and the EMC
Capacitor is connected；
One end of the pull down resistor is connected with the EMC capacitor, other end ground connection.
Further, the input detecting circuit further includes divider resistance, and one end of the divider resistance is connected with described
Resistance is connected, other end ground connection.
Further, the resistance value of the series resistance is more than or equal to 50 kilo-ohms.
Further, the pressure voltage of the EMC capacitor is more than or equal to 100V.
Implement the utility model, has the following beneficial effects:
By the utility model, input circuit is formed only by resistance and capacitor, cost is relatively low；Simultaneously in input circuit
Analog signal can be inputted, and digital signal can be inputted, reusability is strong；It is defeated more than the input of micro-control unit to input external voltage
It bears also to can protect micro-control unit when voltage in outlet；And the input circuit all has guarantor for electromagnetic interference and abnormal voltage
Shield effect, solves caused by the prior art that input circuit is at high cost, reusability is poor or suitable with the technical program cost, but
It is the failure to the problem of reaching antistatic protection and anti-transient pulse function.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structure chart for the digital simulation multiplexing input detecting circuit that an embodiment of the present invention provides.
Fig. 2 is the structure chart for the digital simulation multiplexing input detecting circuit that another embodiment of the utility model provides.
Specific embodiment
This patent core content is using resistance and capacitor design input detecting circuit, can carry out level translation, can be with
Prevent electromagnetism and impulse disturbances, reusability is good and at low cost, below in conjunction with drawings and examples to the specific embodiment do into
One step explanation.
A kind of digital simulation multiplexing input detecting circuit embodiment provided by the utility model is described more fully below.
As shown in Figure 1, an embodiment of the present invention provides digital simulation multiplexing input detecting circuit, the input inspection
Slowdown monitoring circuit includes Electro Magnetic Compatibility (Electro Magnetic Compatibility, EMC) capacitor 11, series resistance 12, filter
Wave capacitor 13, pull-up resistor 14 and pull down resistor 15, in which:
The input terminal of one end connection input detecting circuit of EMC capacitor 11, other end ground connection 19；
One end of series resistance 12 is connected with EMC capacitor 11, and the other end is connected with one end of filter capacitor 13；The filtering
The other end of capacitor 13 is grounded；
One end of pull-up resistor 14 is connected with the supply voltage end VCC18 of input detecting circuit, the other end and EMC capacitor 11
It is connected；
One end of pull down resistor 15 is connected with EMC capacitor 11, other end ground connection 19；
It should be noted that EMC capacitor 11, series resistance 12 and 13 three of filter capacitor are essential, EMC capacitor 11 is used
Noise is reduced, for electromagnetism or impulse disturbances, the pressure voltage of EMC capacitor 11 is selected to be filtered more than or equal to 100V；String
Connection resistance 12 is used to play metering function, while forming resistance capacitance RC filter circuit with filter capacitor 13；Input detecting circuit
Output end be connected to the input/output port of micro-control unit (Microcontroller Unit, MCU) 17；For electromagnetism or
Impulse disturbances are just very small using energy after 12 current limliting of series resistance after EMC capacitive filter, using MCU17's
Clamp diode discharges in input/output port.
It should also be noted that, only setting 14 mode of pull-up resistor is generally used for the external input signal of input detecting circuit
It is drop-down digital signal either low sideband digital signal, by pull-up resistance 14, when external input signal is pulldown signal
Or when low sideband digital signal, the available high level of the output end of the input detecting circuit, the voltage of the high level is by inputting
The supply voltage end VCC18 of detection circuit is determined, therefore the output voltage of the input detecting circuit can oneself control.
It should also be noted that, only setting 15 mode of pull down resistor is generally used for the external input signal of input detecting circuit
When being pull-up digital signal or high sideband digital signal；By the way that pull down resistor 15 is arranged, when external input signal is pull up signal
Or when high sideband digital signal, the available suitable low level of the output end of the input detecting circuit.
It should also be noted that, when external input signal needs cracking failing edge, while pull-up resistor 14 is set under
Pull-up resistor 15, pull-up resistor 14 are used for upper pull-up voltage, and pull down resistor 15 is for discharging.
Therefore the present embodiment provides in input detecting circuit, pull-up resistor 14 and pull down resistor 15 can be believed according to input
It number is selected and is configured.
As shown in Fig. 2, another embodiment of the utility model provides digital simulation multiplexing input detecting circuit, the input
Detection circuit increases divider resistance 16 with reference to Fig. 1, and one end of divider resistance 16 is connected with series circuit 12, other end ground connection.
Divider resistance 16 and series resistance 12 form series circuit, play the role of partial pressure；Therefore either input detecting circuit is defeated
Enter signal either analog signal or digital signal, configured by series resistance 13 and the resistance value of divider resistance 16, it can
Realize voltage conversion ratio example；The filter constant of input detecting circuit configures series resistance 12 and filtered electrical according to the input of signal
Hold 13 size.
Overvoltage protection is carried out for abnormal voltage to realize, when input voltage over-voltage, because of the current limliting of series resistance 12
Protection, the input detecting circuit are output to the electric current very little of MCU17 input/output port, can be directly by upper inside MCU17 mouthfuls
It draws clamp diode to discharge, plays a protective role, the resistance value of series resistance 12 is more than or equal to 50 kilo-ohms most preferably, and specific size needs
Will according to MCU17 input/output port bear maximum power dissipation be calculated, divider resistance 16 according to the resistance value of series resistance 12 come
Match, therefore even if normal signal by maximum voltage value after divider resistance has been more than the maximum pressure resistance of MCU17 input/output port
Value, the input/output port of MCU17 also can work normally.
Implement the utility model, has the following beneficial effects:
By the utility model, input circuit is formed only by resistance and capacitor, cost is relatively low；Simultaneously in input circuit
Analog signal can be inputted, and digital signal can be inputted, reusability is strong；It is defeated more than the input of micro-control unit to input external voltage
It bears also to can protect micro-control unit when voltage in outlet；And the input circuit all has guarantor for electromagnetic interference and abnormal voltage
Shield effect, solves caused by the prior art that input circuit is at high cost, reusability is poor or suitable with the technical program cost, but
It is the failure to the problem of reaching antistatic protection and anti-transient pulse function.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard
To belong to the protection scope of the utility model.
Claims (4)
1. a kind of digital simulation is multiplexed input detecting circuit, which is characterized in that the input detecting circuit includes Electro Magnetic Compatibility
EMC capacitor, series resistance, filter capacitor, pull-up resistor and pull down resistor, in which:
EMC capacitor one end connects the input terminal of the input detecting circuit, other end ground connection；
One end of the series resistance is connected with the EMC capacitor, and the other end is connected with one end of the filter capacitor；The filter
The other end of wave capacitor is grounded；
One end of the pull-up resistor is connected with the supply voltage end of the input detecting circuit, the other end and the EMC capacitor
It is connected；
One end of the pull down resistor is connected with the EMC capacitor, other end ground connection.
2. input detecting circuit as described in claim 1, which is characterized in that the input detecting circuit further includes partial pressure electricity
Resistance, one end of the divider resistance are connected with the series resistance, other end ground connection.
3. input detecting circuit as described in claim 1, which is characterized in that the resistance value of the series resistance is more than or equal to 50,000
Europe.
4. input detecting circuit as described in claim 1, which is characterized in that the pressure voltage of the EMC capacitor is more than or equal to
100V。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821522433.3U CN208924207U (en) | 2018-09-18 | 2018-09-18 | A kind of digital simulation multiplexing input detecting circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821522433.3U CN208924207U (en) | 2018-09-18 | 2018-09-18 | A kind of digital simulation multiplexing input detecting circuit |
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| Publication Number | Publication Date |
|---|---|
| CN208924207U true CN208924207U (en) | 2019-05-31 |
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| CN201821522433.3U Active CN208924207U (en) | 2018-09-18 | 2018-09-18 | A kind of digital simulation multiplexing input detecting circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111323693A (en) * | 2020-03-18 | 2020-06-23 | Oppo广东移动通信有限公司 | Test circuit, mainboard and terminal equipment |
| CN112977297A (en) * | 2019-12-13 | 2021-06-18 | 北汽福田汽车股份有限公司 | Signal acquisition circuit, control method, vehicle control unit and vehicle |
| CN112984095A (en) * | 2021-02-08 | 2021-06-18 | 潍柴雷沃重工股份有限公司 | Non-road automatic mechanical gear box controller, gear box and non-road locomotive |
| WO2023098522A1 (en) * | 2021-11-30 | 2023-06-08 | 长春捷翼汽车科技股份有限公司 | New energy vehicle and onboard charging device thereof, electronic lock control circuit, and control method |
-
2018
- 2018-09-18 CN CN201821522433.3U patent/CN208924207U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112977297A (en) * | 2019-12-13 | 2021-06-18 | 北汽福田汽车股份有限公司 | Signal acquisition circuit, control method, vehicle control unit and vehicle |
| CN111323693A (en) * | 2020-03-18 | 2020-06-23 | Oppo广东移动通信有限公司 | Test circuit, mainboard and terminal equipment |
| CN111323693B (en) * | 2020-03-18 | 2022-01-07 | Oppo广东移动通信有限公司 | Test circuit, mainboard and terminal equipment |
| CN112984095A (en) * | 2021-02-08 | 2021-06-18 | 潍柴雷沃重工股份有限公司 | Non-road automatic mechanical gear box controller, gear box and non-road locomotive |
| WO2023098522A1 (en) * | 2021-11-30 | 2023-06-08 | 长春捷翼汽车科技股份有限公司 | New energy vehicle and onboard charging device thereof, electronic lock control circuit, and control method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211230 Address after: 511434 No. 36, Longying Road, Shilou Town, Panyu District, Guangzhou City, Guangdong Province Patentee after: GAC AION New Energy Vehicle Co.,Ltd. Address before: 510030 23 building, Cheng Yue mansion 448-458, Dongfeng Middle Road, Yuexiu District, Guangzhou, Guangdong. Patentee before: GUANGZHOU AUTOMOBILE GROUP Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: No. 36 Longying Road, Shilou Town, Panyu District, Guangzhou City, Guangdong Province Patentee after: GAC AION NEW ENERGY AUTOMOBILE Co.,Ltd. Country or region after: China Address before: No. 36 Longying Road, Shilou Town, Panyu District, Guangzhou City, Guangdong Province Patentee before: GAC AION New Energy Vehicle Co.,Ltd. Country or region before: China |
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| CP03 | Change of name, title or address |