CN203554407U - Switching value sampling circuit - Google Patents
Switching value sampling circuit Download PDFInfo
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- CN203554407U CN203554407U CN201320685284.3U CN201320685284U CN203554407U CN 203554407 U CN203554407 U CN 203554407U CN 201320685284 U CN201320685284 U CN 201320685284U CN 203554407 U CN203554407 U CN 203554407U
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Abstract
The utility model disclose a switching value sampling circuit which is connected with an analog quantity port and used for sampling switching values of high-level, low-level and suspension states simultaneously. The circuit comprises a protective circuit, first to third resistors and a first diode. The anode of the first diode is connected with a +10V power supply via the first resistor, and the cathode of the first diode is connected one end of the second resistor, one end of the third resistor and the protective circuit. The other end of the second resistor is connected with the analog quantity port. The other end of the third resistor is grounded. The protective circuit is also connected with an AD converter. The sampling circuit is arranged on the analog quantity port so that the high-level, low-level and suspension states can be sampled simultaneously, and conversion sampling among the three states can be flexibly arranged according to requirements. Therefore, the switching value sampling circuit is great in adaptability, simple and effective in port protection and high in reliability.
Description
Technical field
The utility model relates to sample circuit technical field, relates in particular to a kind of switching value sample circuit.
Background technology
Switching value is divided into two kinds of high level and low levels, generally has two kinds of processing modes: design respectively high level and low level sample circuit, and the switching value signal of varying level form from corresponding input circuit access; Another kind is by analog switch, to switch input circuit according to the signal form of switching value, reaches same port and can access the switching value signal of unlike signal form.Front a kind of shortcoming is that switching value port is forced to distribute, and can not use flexibly; Rear a kind of shortcoming is circuit complexity, and is difficult for carrying out port protection.
Utility model content
The utility model is mainly to solve existing technical problem in prior art, thereby provides a kind of adaptability good, the simple switching value sample circuit of port protection.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals:
Switching value sample circuit of the present utility model, described circuit is connected with analog quantity port, and for the high level of sampling simultaneously, the switching value of low level and vacant state, described circuit comprises protective circuit, the first to the 3rd resistance, the first diode, the anode of described the first diode is connected with+10V power supply through the first resistance, its negative electrode and second resistance one end, the 3rd resistance one end, protective circuit is connected, the other end of described the second resistance is connected with described analog quantity port, the other end ground connection of described the 3rd resistance, wherein, described protective circuit is also connected with AD converter.
Further; described protective circuit comprises the 4th resistance, the second diode, electric capacity; one end of described the 4th resistance is connected with negative electrode, second resistance one end, the 3rd resistance one end of described the first diode; its other end is connected with anode, one end of electric capacity, the AD converter of the second diode; the negative electrode of described the second diode is connected with+5V power supply, the other end ground connection of described electric capacity.
Further, the size of described first to fourth resistance is respectively 30K Ω, 2K Ω, 10K Ω, 20K Ω.
Compared with prior art; the utility model has the advantage of: by this sample circuit being set at analog quantity port; can to high level, low level and unsettled three kinds of states, sample simultaneously; and three kinds of conversion samplings between state can be set as required flexibly; adaptability is very good; port protection is simply effective, and reliability is high.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the circuit diagram of switching value sample circuit of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail, thereby so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that, protection range of the present utility model is made to more explicit defining.
Consult shown in Fig. 1, switching value sample circuit of the present utility model, this circuit is connected with analog quantity port, and for the high level of sampling simultaneously, the switching value of low level and vacant state, this circuit comprises protective circuit, the first to the 3rd resistance (R1-R3), the first diode D1, the anode of the first diode D1 is connected with+10V power supply through the first resistance R 1, its negative electrode and second resistance R 2 one end, the 3rd resistance R 3 one end, protective circuit is connected, the other end of the second resistance R 2 is connected with analog quantity port, the other end ground connection of the 3rd resistance R 3, wherein, this protective circuit is also connected with AD converter.
Concrete; protective circuit comprises the 4th resistance R 4, the second diode D2, capacitor C 1; one end of the 4th resistance R 4 is connected with negative electrode, second resistance R 2 one end, the 3rd resistance R 3 one end of the first diode D1; its other end is connected with anode, one end of capacitor C 1, the AD converter of the second diode D2; the negative electrode of the second diode D2 is connected with+5V power supply, the other end ground connection of capacitor C 1.In the present embodiment, the size of first to fourth resistance (R1-R4) is respectively 30K Ω, 2K Ω, 10K Ω, 20K Ω.
In the utility model, when input is unsettled, the input voltage of A/D convertor circuit is the first resistance R 1, the first diode D1 and the dividing potential drop of the 3rd resistance R 3 to 10V voltage; When input connects high level, due to the buffer action of the first diode D1, the input voltage of A/D convertor circuit is the second resistance R 2 and the dividing potential drop of the 3rd resistance R 3 to input high level; When input grounding, the input voltage of A/D convertor circuit is the first resistance R 1, the first diode D1 and the 3rd resistance R 3 and the second resistance R 2 dividing potential drop to 10V voltage in parallel.Circuit ratio of the present utility model be easier to distinguish input unsettled, connect high level and connect three kinds of states of low level; so needn't change circuit form, just can detect high level or low level or unsettled; adaptability is very good, and port protection is simply effective, and reliability is high.
Above, be only embodiment of the present utility model, but protection range of the present utility model is not limited to this, any variation of expecting without creative work or replacement, within all should being encompassed in protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range that claims were limited.
Claims (3)
1. a switching value sample circuit, described circuit is connected with analog quantity port, and for the high level of sampling simultaneously, the switching value of low level and vacant state, it is characterized in that: described circuit comprises protective circuit, the first to the 3rd resistance (R1-R3), the first diode (D1), the anode of described the first diode (D1) is connected with+10V power supply through the first resistance (R1), its negative electrode and the second resistance (R2) one end, the 3rd resistance (R3) one end, protective circuit is connected, the other end of described the second resistance (R2) is connected with described analog quantity port, the other end ground connection of described the 3rd resistance (R3), wherein, described protective circuit is also connected with AD converter.
2. switching value sample circuit according to claim 1, it is characterized in that: described protective circuit comprises the 4th resistance (R4), the second diode (D2), electric capacity (C1), the negative electrode of one end of described the 4th resistance (R4) and described the first diode (D1), the second resistance (R2) one end, the 3rd resistance (R3) one end is connected, the anode of its other end and the second diode (D2), one end of electric capacity (C1), AD converter is connected, the negative electrode of described the second diode (D2) is connected with+5V power supply, the other end ground connection of described electric capacity (C1).
3. switching value sample circuit according to claim 1, is characterized in that: the size of described first to fourth resistance (R1-R4) is respectively 30K Ω, 2K Ω, 10K Ω, 20K Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320685284.3U CN203554407U (en) | 2013-10-31 | 2013-10-31 | Switching value sampling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320685284.3U CN203554407U (en) | 2013-10-31 | 2013-10-31 | Switching value sampling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203554407U true CN203554407U (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320685284.3U Expired - Fee Related CN203554407U (en) | 2013-10-31 | 2013-10-31 | Switching value sampling circuit |
Country Status (1)
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| CN (1) | CN203554407U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104914376A (en) * | 2015-05-08 | 2015-09-16 | 武汉合康动力技术有限公司 | Digital circuit state detection circuit and digital circuit state detection method |
| CN107872053A (en) * | 2017-11-25 | 2018-04-03 | 贵阳永青仪电科技有限公司 | A kind of lightning protection low level switching value sample circuit |
| CN107976569A (en) * | 2017-11-25 | 2018-05-01 | 贵阳永青仪电科技有限公司 | A kind of thunder-lightning die mould simulates signal sample circuit |
| CN108616278A (en) * | 2016-12-12 | 2018-10-02 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of discrete magnitude, analog quantity normalization Acquisition Circuit and method |
| CN108802606A (en) * | 2018-05-25 | 2018-11-13 | 惠州市德赛西威汽车电子股份有限公司 | A kind of detectable input port is hanging and the circuit of low and high level |
| CN111830867A (en) * | 2020-06-28 | 2020-10-27 | 东风电驱动系统有限公司 | Three-state switch signal acquisition circuit and method |
| CN113708753A (en) * | 2021-07-15 | 2021-11-26 | 深圳市有为信息技术发展有限公司 | Three-state input interface circuit for detecting switching value of commercial vehicle and vehicle-mounted terminal |
-
2013
- 2013-10-31 CN CN201320685284.3U patent/CN203554407U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104914376A (en) * | 2015-05-08 | 2015-09-16 | 武汉合康动力技术有限公司 | Digital circuit state detection circuit and digital circuit state detection method |
| CN108616278A (en) * | 2016-12-12 | 2018-10-02 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of discrete magnitude, analog quantity normalization Acquisition Circuit and method |
| CN108616278B (en) * | 2016-12-12 | 2021-09-14 | 中国航空工业集团公司西安航空计算技术研究所 | Discrete quantity and analog quantity normalized acquisition circuit and method |
| CN107872053A (en) * | 2017-11-25 | 2018-04-03 | 贵阳永青仪电科技有限公司 | A kind of lightning protection low level switching value sample circuit |
| CN107976569A (en) * | 2017-11-25 | 2018-05-01 | 贵阳永青仪电科技有限公司 | A kind of thunder-lightning die mould simulates signal sample circuit |
| CN108802606A (en) * | 2018-05-25 | 2018-11-13 | 惠州市德赛西威汽车电子股份有限公司 | A kind of detectable input port is hanging and the circuit of low and high level |
| CN111830867A (en) * | 2020-06-28 | 2020-10-27 | 东风电驱动系统有限公司 | Three-state switch signal acquisition circuit and method |
| CN113708753A (en) * | 2021-07-15 | 2021-11-26 | 深圳市有为信息技术发展有限公司 | Three-state input interface circuit for detecting switching value of commercial vehicle and vehicle-mounted terminal |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 Termination date: 20151031 |
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| EXPY | Termination of patent right or utility model |