CN208479594U - A kind of conversion circuit being compatible with high or low level input - Google Patents
A kind of conversion circuit being compatible with high or low level input Download PDFInfo
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- CN208479594U CN208479594U CN201821249911.8U CN201821249911U CN208479594U CN 208479594 U CN208479594 U CN 208479594U CN 201821249911 U CN201821249911 U CN 201821249911U CN 208479594 U CN208479594 U CN 208479594U
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- npn triode
- conversion circuit
- low level
- resistance
- level
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Abstract
The utility model discloses a kind of conversion circuit for being compatible with high or low level input, including NPN triode Q1, the collector series connection resistance R1 of NPN triode Q1 are electrically connected to a power source, and the collector of NPN triode Q1 is defined as the output port of conversion circuit;The base stage series resistor R3 of NPN triode Q1 is electrically connected with the signal input port of conversion circuit, and the switching diode D1 for high pressure clamper or low pressure conduction is concatenated between resistance R3 and the tie point of the signal input port of conversion circuit and the collector of NPN triode Q1;The tie point of the base stage of resistance R3 and the NPN triode Q1 passes through series resistor R2 to ground;The emitter of NPN triode Q1 is electrically connected to ground;When level conversion, along the signal input port input high level or low level of conversion circuit, high pressure clamper or the low pressure for matching switching diode D1 are conductive, and NPN triode Q1 conducting simultaneously exports low level from its output port, and level conversion is completed in matching.The conversion circuit simple and stable of the utility model can be compatible with high level or low level input.
Description
Technical field
The utility model relates to detection circuit technical fields, more particularly to a kind of conversion electricity for being compatible with high or low level input
Road.
Background technique
In existing, signal is controlled in integrated circuits from a certain operating voltage circuit part and is transferred to another operating voltage electricity
When the part of road, for the difference of operating voltage, need to carry out level conversion to transmission signal.
In existing, deficiency existing for the conversion circuit of level conversion is carried out to transmission signal and is: existing conversion circuit
It can only identify individual signals, that is, can only identify high level or identification low level, when the level of input and the level of design
When conversion circuit mismatches, level shifting circuit does not work, in order to meet integrated circuit operation demand, it is existing in usually using more
The level shifting circuit of seed type, plurality of specifications, so that IC design is complicated, and circuit is unstable.
In view of the above problems in the related art, not yet there is effective solution at present.
Utility model content
The technical problems to be solved in the utility model is provided a kind of simple for defect present in existing design technology
Conversion circuit stable, that high level or low level input can be compatible with.
In order to solve the above technical problems, the technical solution that the utility model is taken is as follows: a kind of high or low level of compatibility is defeated
The conversion circuit entered, including the NPN triode Q1 for level conversion, collector (c) series resistor of the NPN triode Q1
R1 is electrically connected to a power source, and the collector (c) of the NPN triode Q1 is also defined as the output port of the conversion circuit;Institute
Base stage (b) the series resistor R3 for stating NPN triode Q1 is electrically connected with the signal input port of conversion circuit, the resistance R3 and institute
It states and is concatenated between the tie point of the signal input port of conversion circuit and the collector (c) of the NPN triode Q1 for high pressure
The switching diode D1 of clamper or low pressure conduction;The tie point of the base stage (b) of the resistance R3 and the NPN triode Q1 is also logical
Series resistor R2 is crossed to ground;The emitter (e) of the NPN triode Q1 is electrically connected to ground;When level conversion, along conversion circuit
Signal input port input high level or low level, high pressure clamper or the low pressure for matching the switching diode D1 are conductive, make institute
It states NPN triode Q1 conducting and exports low level from its output port, level conversion is completed in matching.
It is further described as to above-mentioned technical proposal:
In the above-mentioned technical solutions, the NPN triode Q1 is 9013 model triodes.
In the above-mentioned technical solutions, the switching diode D1 is 1N4148 model switching diode.
In the above-mentioned technical solutions, the resistance value of the resistance R1, resistance R2 and resistance R3 be respectively 220 Ω, 1000 Ω and
6200Ω。
The utility model has the beneficial effects that: the conversion circuit of the utility model, regardless of A-IN input terminal is low level
Or high level (being higher than 4.32V), low level signal all can be detected in B-OUT output end;The conversion circuit of the utility model is compared
Traditional conversion circuit can only identify individual signals (or high level or low level) that this circuit can be compatible with the low flat detection of high electricity simultaneously
And circuit simple and stable.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model conversion circuit.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
It is exemplary by reference to the embodiment that attached drawing describes, it is intended to for explaining the application, and should not be understood as pair
The limitation of the application.In the description of the present application, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ",
" width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside",
The orientation or positional relationship of the instructions such as " clockwise ", " counterclockwise " be based on the orientation or positional relationship shown in the drawings, be only for
Convenient for description the application and simplify description, rather than the device or element of indication or suggestion meaning there must be specific side
Position is constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.In addition, term " first ", " second "
It is used for description purposes only, is not understood to indicate or imply relative importance or implicitly indicates indicated technical characteristic
Quantity.Thus, define " first ", the feature of " second " can explicitly or implicitly include one or more spy
Sign.In the description of the present application, " several ", the meaning of " plurality " is two or more, unless otherwise clearly specific
It limits.Unless otherwise clearly defined and limited, in this application, the arts such as term " installation ", " connected ", " connection ", " fixation "
Language shall be understood in a broad sense, such as, it may be a fixed connection, may be a detachable connection, or be integrally connected;It can be machinery
Connection, is also possible to be electrically connected;It can be directly connected, two elements can also be can be indirectly connected through an intermediary
Internal connection.For the ordinary skill in the art, above-mentioned term can be understood in the application as the case may be
In concrete meaning.Unless otherwise clearly defined and limited, in this application, fisrt feature the "upper" of second feature or it
"lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to
Cross the other characterisation contact between them.And fisrt feature includes above the second feature " above ", " above " and " above "
One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special
Sign includes fisrt feature right above second feature and oblique upper under the second feature " below ", " below " and " below ", or only
Indicate that first feature horizontal height is less than second feature.
Attached drawing 1 example specific embodiment of the utility model.It is a kind of to be compatible with what high or low level inputted with reference to attached drawing 1
Conversion circuit, including the NPN triode Q1 for level conversion, in the present embodiment, the NPN triode Q1 is 9013 models
Triode, collector (c) the series resistor R1 and+3.3V power electric connection of the NPN triode Q1, and the NPN triode
The collector (c) of Q1 and the tie point of resistance R1 are also defined as the output port (B-OUT) of the conversion circuit;The NPN tri-
Base stage (b) the series resistor R3 of pole pipe Q1 is electrically connected with the signal input port (A-IN) of conversion circuit, the resistance R3 and institute
It states and concatenates use between the tie point and the collector (c) of the NPN triode Q1 of the signal input port (A-IN) of conversion circuit
In the switching diode D1 of high pressure clamper or low pressure conduction, in the present embodiment, switching diode D1 is two pole of 1N4148 model
Pipe;The tie point of the base stage (b) of the resistance R3 and the NPN triode Q1 also passes through series resistor R2 to ground, the NPN tri-
The emitter (e) of pole pipe Q1 is electrically connected to ground;In the present embodiment, the resistance value of the resistance R1, resistance R2 and resistance R3 are preferred
For 220 Ω, 1000 Ω and 6200 Ω, and the resistance R2 and resistance R3 built-up circuit branch and provide driving NPN triode Q1
Base stage (b) electric current of conducting;It should be noted that the high pressure clamper of switching diode D1 refers to the signal when the conversion circuit
When what input port (A-IN) inputted is high level (being higher than 4.32V), switching diode D1 reversely ends, the input made
High level loads on resistance R2 and resistance R3 built-up circuit branch and forms the base current of driving NPN triode Q1 conducting；And
The conducting of so-called low pressure refer to when the input of the signal input port (A-IN) of the conversion circuit be low level when, switching diode
D1 conducting, power supply (+3.3) match shape along switching diode D1 output voltage to resistance R2 and resistance R3 built-up circuit branch
At the base current of driving NPN triode Q1 conducting;When level conversion works, when the signal input port (A-IN) of conversion circuit
Input high level, at this time the switching diode D1 high pressure clamper, high level input resistance R2 and resistance R3 built-up circuit branch
And base stage (b) electric current is formed, meanwhile, power supply (+3.3V) provides matching power supply and forms collector (c) electric current, and then makes NPN tri-
Pole pipe Q1 conducting, when NPN triode Q1 is connected, the collector (c) of NPN triode Q1 pulls down to ground, matches the conversion made
The output port (B-OUT) of circuit over the ground, that is, exports low level;When the signal input port (A-IN) of conversion circuit inputs
Low level, the switching diode D1 low pressure conducting, power supply (+3.3V) export matched electricity through switching diode D1 pressure stabilizing at this time
Source and input resistance R2 and resistance R3 built-up circuit branch simultaneously form base stage (b) electric current, meanwhile, power supply (+3.3V) provides matching
Power supply simultaneously forms collector (c) electric current, and then NPN triode Q1 is connected, when NPN triode Q1 is connected, NPN triode Q1
Collector (c) pulls down to ground, matches the output port (B-OUT) of the conversion circuit made over the ground, that is, output low level.
The above is only the utility model preferred embodiment, not makes any form of restriction to the utility model, although
The utility model is disclosed above in the preferred embodiment, however is not limited to the utility model, any person skilled in the art,
It does not depart from the utility model technical proposal scope, when the technology contents using the disclosure above make a little change or are modified to equivalent change
The equivalent embodiment of change, but it is all without departing from the utility model technical solution content, refer to according to the utility model technology to above embodiments
Made any simple modification, equivalent change and modification belong in the range of the utility model technical solution.
Claims (4)
1. a kind of conversion circuit for being compatible with high or low level input, it is characterised in that, including the NPN triode for level conversion
Collector (c) the series resistor R1 of Q1, the NPN triode Q1 are electrically connected to a power source, and the collector of the NPN triode Q1
(c) also it is defined as the output port of the conversion circuit;Base stage (b) the series resistor R3 and conversion electricity of the NPN triode Q1
The signal input port on road is electrically connected, the tie point of the resistance R3 and the signal input port of the conversion circuit with it is described
Switching diode D1 of the concatenation for high pressure clamper or low pressure conduction between the collector (c) of NPN triode Q1;The resistance R3
Also pass through series resistor R2 to ground with the tie point of the base stage (b) of the NPN triode Q1;The transmitting of the NPN triode Q1
Pole (e) is electrically connected to ground;When level conversion, along the signal input port input high level or low level of conversion circuit, institute is matched
High pressure clamper or the low pressure for stating switching diode D1 are conductive, and the NPN triode Q1 is made to be connected and export from its output port low
Level conversion is completed in level, matching.
2. a kind of conversion circuit for being compatible with high or low level input according to claim 1, it is characterised in that, the NPN
Triode Q1 is 9013 model triodes.
3. a kind of conversion circuit for being compatible with high or low level input according to claim 2, it is characterised in that, the switch
Diode D1 is 1N4148 model switching diode.
4. a kind of conversion circuit for being compatible with high or low level input according to claim 3, it is characterised in that, the resistance
The resistance value of R1, resistance R2 and resistance R3 are respectively 220 Ω, 1000 Ω and 6200 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821249911.8U CN208479594U (en) | 2018-08-04 | 2018-08-04 | A kind of conversion circuit being compatible with high or low level input |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821249911.8U CN208479594U (en) | 2018-08-04 | 2018-08-04 | A kind of conversion circuit being compatible with high or low level input |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208479594U true CN208479594U (en) | 2019-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821249911.8U Expired - Fee Related CN208479594U (en) | 2018-08-04 | 2018-08-04 | A kind of conversion circuit being compatible with high or low level input |
Country Status (1)
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| CN (1) | CN208479594U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111556633A (en) * | 2020-05-26 | 2020-08-18 | 广州彩熠灯光股份有限公司 | Control circuit and lighting control system |
| CN113114213A (en) * | 2021-02-24 | 2021-07-13 | 云谷技术(珠海)有限公司 | Interface conversion circuit and system |
-
2018
- 2018-08-04 CN CN201821249911.8U patent/CN208479594U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111556633A (en) * | 2020-05-26 | 2020-08-18 | 广州彩熠灯光股份有限公司 | Control circuit and lighting control system |
| CN113114213A (en) * | 2021-02-24 | 2021-07-13 | 云谷技术(珠海)有限公司 | Interface conversion circuit and system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190205 Termination date: 20210804 |