CN202034964U - Signal input circuit of electronic device - Google Patents
Signal input circuit of electronic device Download PDFInfo
- Publication number
- CN202034964U CN202034964U CN2011200880376U CN201120088037U CN202034964U CN 202034964 U CN202034964 U CN 202034964U CN 2011200880376 U CN2011200880376 U CN 2011200880376U CN 201120088037 U CN201120088037 U CN 201120088037U CN 202034964 U CN202034964 U CN 202034964U
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- switch
- signal input
- input circuit
- resistance
- branch road
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Abstract
The utility model discloses a signal input circuit of an electronic device, comprising a first resistor, a second resistor, a first switch, a second switch and a third switch, wherein the first resistor and the first switch are serially connected and used as a first branch, the second resistor and the second switch are serially connected and used as a second branch, the first branch and the second branch are parallelly connected, and the third switch is serially connected with the parallelly connected first branch and second branch. According to the signal input circuit of electronic device, the active high input and active low input of an input pin are controlled in a program, only the output level of a control pin is changed to set the input pin as active high input or active low input. The signal input circuit is conveniently modified on site. In addition, for different environments, the hardware hardly needs changing, only different software is configured, thus convenient for managing and controlling of the product.
Description
Technical field
The utility model belongs to the electronic communication technology field, relates to a kind of signal input circuit, relates in particular to a kind of signal input circuit of electronic equipment.
Background technology
The present signal input circuit that uses on the prior art when effective level when being high, must be equipped with a pull down resistor on circuit, and when effective level be when hanging down, must on circuit, be equipped with a pull-up resistor.So common way is to be equipped with a pull-up resistor and a pull down resistor on pin simultaneously, according to certain resistance of different situations decision welding at scene, remove another resistance then.
The defective of above scheme is that the on-the-spot flexibility of existing signal input circuit is very poor, when temporary needs is revised, and troublesome poeration.And different height effectively can produce different BOM inventories, and the management and the management and control of product all brought great trouble.
The utility model content
Technical problem to be solved in the utility model is: the signal input circuit that a kind of electronic equipment is provided, the height of input pin effectively can be by controlling in the program, only need to change the output level of control pin, can set input pin for high effectively still effectively low.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of signal input circuit of electronic equipment, described signal input circuit comprise first resistance, second resistance, first switch, second switch, the 3rd switch;
Described first resistance is connected in series as first branch road with first switch, and second resistance is connected in series with second switch as second branch road;
Described first branch road is in parallel with second branch road, and described the 3rd switch is connected with first branch road, second branch road in parallel.
As a kind of preferred version of the present utility model, be provided with first diode between described first resistance and first switch, be provided with second diode between described second resistance and the second switch.
As a kind of preferred version of the present utility model, described the 3rd switch is a triode.
As a kind of preferred version of the present utility model, the collector electrode of described triode connects first branch road, second branch road, the grounded emitter of described triode.
As a kind of preferred version of the present utility model, described first switch, second switch are metal-oxide-semiconductor; Described first switch is first metal-oxide-semiconductor, and second switch is second metal-oxide-semiconductor.
As a kind of preferred version of the present utility model, described first metal-oxide-semiconductor is the P channel MOS tube; The base stage of described first metal-oxide-semiconductor connects described the 3rd switch, and drain electrode connects first resistance, and source electrode connects power supply VCC.
As a kind of preferred version of the present utility model, described second metal-oxide-semiconductor is the N-channel MOS pipe; The base stage of described second metal-oxide-semiconductor connects described the 3rd switch, and drain electrode connects second resistance, source ground.
The beneficial effects of the utility model are: the signal input circuit of the electronic equipment that the utility model proposes, the height of input pin effectively can be by controlling in the program, only need to change the output level of control pin, can set input pin for high effectively still effectively low.The utility model signal input circuit is on-the-spot to be revised conveniently.And at different environment, hardware need not be changed fully, only needs the different software of configuration to get final product, and makes things convenient for the management and control of product.
Description of drawings
Fig. 1 is the circuit diagram of the utility model signal input circuit.
Embodiment
Describe preferred embodiment of the present utility model in detail below in conjunction with accompanying drawing.
Embodiment one
The utility model has disclosed a kind of signal input circuit of electronic equipment, is used for revising easily the significant level on the input pin.Use one road output pin by the triode electronic switch in the design, the different conditions of two metal-oxide-semiconductors of control, thus draw different effective statuses with pull down resistor on realizing, reach the purpose that changes significant level.
See also Fig. 1, the utility model signal input circuit comprises first resistance 11, second resistance 12, the first switch Q17, second switch Q21, the 3rd switch Q18.
Described first resistance 11 is connected in series as first branch road with the first switch Q17, and second resistance 12 is connected in series as second branch road with second switch Q21; Described first branch road is in parallel with second branch road, and described the 3rd switch Q18 connects with first branch road, second branch road in parallel.
In addition, be provided with first diode 21 between described first resistance 11 and the first switch Q17, be provided with second diode 22 between described second resistance 12 and the second switch Q21.
Described the 3rd switch Q18 is a triode.The collector electrode of described triode connects first branch road, second branch road, the grounded emitter of described triode.
In the present embodiment, described first switch 11, second switch 12 are metal-oxide-semiconductor; Described first switch 11 is first metal-oxide-semiconductor, and second switch 12 is second metal-oxide-semiconductor.
As shown in the figure, described first metal-oxide-semiconductor is the P channel MOS tube; The base stage of described first metal-oxide-semiconductor connects described the 3rd switch Q18, and drain electrode connects first resistance 11 by first diode 21, and source electrode connects power supply VCC.Described second metal-oxide-semiconductor is the N-channel MOS pipe; The base stage of described second metal-oxide-semiconductor connects described the 3rd switch Q18 by second diode 22, and drain electrode connects second resistance 12, source ground.
The course of work of the utility model electronic equipment signal input circuit is:
When the needs pull-up resistor is effective, control end output high level, the 3rd switch Q18 conducting.Make win switch Q17 and second switch Q21 input low level, the first switch Q17 conducting, second switch Q21 ends, and final feasible input the first half is effective.At this moment be exactly that the height that is provided with is joined.
Otherwise when the needs pull down resistor is effective, the control end output low level, the 3rd switch Q18 ends.Make win switch Q17 and second switch Q21 input high level, second switch Q21 conducting, the first switch Q17 ends, and final feasible input the latter half is effective.At this moment it is exactly low the joining that is provided with.
In sum, the signal input circuit of the electronic equipment that the utility model proposes, the height of input pin effectively can only need to change the output level of control pin by controlling in the program, can set input pin for high effectively still effectively low.The utility model signal input circuit is on-the-spot to be revised conveniently.And at different environment, hardware need not be changed fully, only needs the different software of configuration to get final product, and makes things convenient for the management and control of product.
Here description of the present utility model and application are illustrative, are not to want with scope restriction of the present utility model in the above-described embodiments.Here the distortion of disclosed embodiment and change are possible, and the various parts of the replacement of embodiment and equivalence are known for those those of ordinary skill in the art.Those skilled in the art are noted that under the situation that does not break away from spirit of the present utility model or substantive characteristics, and the utility model can be with other form, structure, layout, ratio, and realize with other assembly, material and parts.Under the situation that does not break away from the utility model scope and spirit, can carry out other distortion and change here to disclosed embodiment.
Claims (7)
1. the signal input circuit of an electronic equipment is characterized in that, described signal input circuit comprises first resistance, second resistance, first switch, second switch, the 3rd switch;
Described first resistance is connected in series as first branch road with first switch, and second resistance is connected in series with second switch as second branch road;
Described first branch road is in parallel with second branch road, and described the 3rd switch is connected with first branch road, second branch road in parallel.
2. the signal input circuit of electronic equipment according to claim 1 is characterized in that:
Be provided with first diode between described first resistance and first switch, be provided with second diode between described second resistance and the second switch.
3. the signal input circuit of electronic equipment according to claim 1 is characterized in that:
Described the 3rd switch is a triode.
4. the signal input circuit of electronic equipment according to claim 3 is characterized in that:
The collector electrode of described triode connects first branch road, second branch road, the grounded emitter of described triode.
5. the signal input circuit of electronic equipment according to claim 1 is characterized in that:
Described first switch, second switch are metal-oxide-semiconductor; Described first switch is first metal-oxide-semiconductor, and second switch is second metal-oxide-semiconductor.
6. the signal input circuit of electronic equipment according to claim 5 is characterized in that:
Described first metal-oxide-semiconductor is the P channel MOS tube;
The base stage of described first metal-oxide-semiconductor connects described the 3rd switch, and drain electrode connects first resistance, and source electrode connects power supply VCC.
7. the signal input circuit of electronic equipment according to claim 5 is characterized in that:
Described second metal-oxide-semiconductor is the N-channel MOS pipe;
The base stage of described second metal-oxide-semiconductor connects described the 3rd switch, and drain electrode connects second resistance, source ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200880376U CN202034964U (en) | 2011-03-29 | 2011-03-29 | Signal input circuit of electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200880376U CN202034964U (en) | 2011-03-29 | 2011-03-29 | Signal input circuit of electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202034964U true CN202034964U (en) | 2011-11-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200880376U Expired - Fee Related CN202034964U (en) | 2011-03-29 | 2011-03-29 | Signal input circuit of electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202034964U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529720A (en) * | 2013-09-26 | 2014-01-22 | 浙江吉利控股集团有限公司 | Digital input circuit and vehicle-mounted controller using same |
-
2011
- 2011-03-29 CN CN2011200880376U patent/CN202034964U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529720A (en) * | 2013-09-26 | 2014-01-22 | 浙江吉利控股集团有限公司 | Digital input circuit and vehicle-mounted controller using same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI CLEVER ELECTRONICS EQUIPMENT CO., LTD. Effective date: 20120509 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120509 Address after: 201100, room 1, building 18, 99 lane, 504 Spring Road, Shanghai, Minhang District Co-patentee after: Shanghai Kelaiwo Electronic Equipment Co.,Ltd. Patentee after: SHANGHAI ONBOE ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 201100, room 1, building 18, 99 lane, 504 Spring Road, Shanghai, Minhang District Patentee before: SHANGHAI ONBOE ELECTRONIC TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 201100, room 1, building 18, 99 lane, 504 Spring Road, Shanghai, Minhang District Co-patentee after: Shanghai Tong Wo Information Systems Co.,Ltd. Patentee after: SHANGHAI ONBOE ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 201100, room 1, building 18, 99 lane, 504 Spring Road, Shanghai, Minhang District Co-patentee before: Shanghai Kelaiwo Electronic Equipment Co.,Ltd. Patentee before: SHANGHAI ONBOE ELECTRONIC TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180228 Address after: 215415 Taicang City, Jiangsu province Shuangfeng town of Oujiang River Road No. 10-3 Patentee after: QINGXIAN ELECTRONIC TECHNOLOGY (SUZHOU) CO.,LTD. Address before: 201100, room 1, building 18, 99 lane, 504 Spring Road, Shanghai, Minhang District Co-patentee before: Shanghai Tong Wo Information Systems Co.,Ltd. Patentee before: SHANGHAI ONBOE ELECTRONIC TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111109 Termination date: 20190329 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |