CN204256446U - SCM Based signal output apparatus - Google Patents
SCM Based signal output apparatus Download PDFInfo
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- CN204256446U CN204256446U CN201420809178.6U CN201420809178U CN204256446U CN 204256446 U CN204256446 U CN 204256446U CN 201420809178 U CN201420809178 U CN 201420809178U CN 204256446 U CN204256446 U CN 204256446U
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- Prior art keywords
- isolation optocoupler
- voltage stabilizing
- diode
- power circuit
- stabilizing chip
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Abstract
The SCM Based signal output apparatus that the utility model provides, comprises power circuit, voltage stabilizing chip and buffer circuit; Buffer circuit comprises isolation optocoupler and diode, single-chip processor i/o mouth is connected with the input end of isolation optocoupler, the output terminal of isolation optocoupler is connected with the delivery outlet of voltage stabilizing chip, the output terminal of isolation optocoupler is also connected with the anode of diode, and the negative electrode of diode is the output signal of described signal output apparatus; Power circuit has ground line output terminal and fire wire output end, and the fire wire output end of power circuit is connected with the input port of voltage stabilizing chip, and the output signal of single-chip processor i/o mouth can be converted to stabilization signal by this signal output apparatus, improves the driving force of I/O mouth.
Description
Technical field
The utility model relates to electronic circuit field and particularly relates to SCM Based signal output apparatus.
Background technology
Single-chip microcomputer is as a kind of common integrated circuit (IC) chip, have employed very large scale integration technology having the little and perfect microcomputer system of that the central processor CPU of data-handling capacity, random access memory ram, read only memory ROM, multiple I/O mouth and the function i ntegration such as interrupt system, timer/counter to one piece of silicon chip are formed, in industrial control field widespread use.
Because total output current of single-chip processor i/o mouth is limited, when the multiple I/O mouth of definition single-chip microcomputer is output state, and when exporting high level simultaneously, in single-chip microcomputer, the output current of each I/O mouth will reduce accordingly, or the current signal that output one is unstable, reduce the driving force of I/O mouth, make this I/O mouth not drive connected electron device.
Utility model content
For above shortcomings in prior art, the problem that the utility model solves is, a kind of signal output apparatus of SCM peripheral is provided, the output signal of single-chip processor i/o mouth can be converted to stabilization signal to export, improve the driving force of I/O mouth, I/O mouth for solving single-chip microcomputer in prior art is difficult to stable output signal, the defect of I/O mouth driving force deficiency.
For solving the problems of the technologies described above, realize utility model object, the technical solution adopted in the utility model is as follows:
SCM Based signal output apparatus, comprises power circuit, voltage stabilizing chip and buffer circuit; Buffer circuit comprises isolation optocoupler and diode, single-chip processor i/o mouth is connected with the input end of isolation optocoupler, the output terminal of isolation optocoupler is connected with the delivery outlet of voltage stabilizing chip, the output terminal of isolation optocoupler is also connected with the anode of diode, and the negative electrode of diode is the output signal of described signal output apparatus; Power circuit has ground line output terminal and fire wire output end, and the fire wire output end of power circuit is connected with the input port of voltage stabilizing chip.
Further, the output terminal of described isolation optocoupler is connected to the anode of described diode by the resistance that series connection resistance is 330 ohm; The input end of described isolation optocoupler is connected to the I/O mouth of described single-chip microcomputer by the resistance that series connection resistance is 220 ohm.
Further; the fire wire output end of described power circuit is connected by the input port of protection circuit with voltage stabilizing chip; protection circuit comprises PNP type triode; the base stage of PNP type triode is by the first divider resistance ground connection; one end that first divider resistance is connected with PNP type triode is connected to the fire wire output end of power circuit by the second divider resistance; the emitter of PNP type triode is connected to the fire wire output end of power circuit by current-limiting resistance, the collector of PNP type triode is connected to the input port of voltage stabilizing chip.
Further, the model of described voltage stabilizing chip is LP2950.
Further, the model of described isolation optocoupler is TLP181 or LTV-356T, and the model of described diode is IN4148.
Compared to prior art, the utility model tool has the following advantages:
1, SCM Based signal output apparatus of the present utility model, the voltage signal that power circuit exports can be changed stable voltage signal by voltage stabilizing chip, when single-chip processor i/o mouth exports high level, the LEDs ON that this high level triggers isolation optocoupler input end integrated is luminous, make to isolate the integrated phototriode conducting of optocoupler output terminal, the stable voltage signal that power circuit exports directly is added in the diode be connected with the output terminal of isolating optocoupler, make diode current flow, and the stable high level signal exported.When single-chip processor i/o mouth output low level, this high level triggers the integrated light emitting diode not conducting of isolation optocoupler input end, the diode be connected is ended, the low level signal of output with the output terminal of isolating optocoupler.The output signal of single-chip processor i/o mouth can be converted to stabilization signal and export by the signal output apparatus of this SCM peripheral, improves the driving force of I/O mouth.
2, SCM Based signal output apparatus of the present utility model, the resistance being connected on isolation optocoupler input end for regulation output size of current, be connected on isolation optocoupler output terminal resistance can limit optocoupler output end current size, reduce power consumption.
3, SCM Based signal output apparatus of the present utility model, the protection circuit of voltage stabilizing chip front end exports big current after playing and preventing rear terminal shortcircuit, burn out the effect of device, the effect of its each resistance and electric capacity is: R47, R53 form simple bleeder circuit, allows the conducting of PNP triode energy; R45 plays the effect of restriction output current, avoids electric current excessive, burns out device, avoid electric current excessive simultaneously, drag down on-Line Voltage.
4, SCM Based signal output apparatus of the present utility model, chooses the voltage stabilizing chip of LP2950 model, has low voltage difference, low-power consumption, advantage of low cost.
5, SCM Based signal output apparatus of the present utility model, chooses the isolation optocoupler of TLP181 or LTV-356T model, have high withstand voltage, isolation effect good, advantage of low cost, chooses the diode of IN4148 model, has breakdown reverse voltage high advantage.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of signal output apparatus in embodiment.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
Embodiment:
SCM Based signal output apparatus, as shown in Figure 1, comprises power circuit, voltage stabilizing chip U9 and buffer circuit; Buffer circuit comprises isolation optocoupler U10 and diode D13, single-chip processor i/o mouth P3.0 is connected with the input end of isolation optocoupler U10, the output terminal of isolation optocoupler U10 is connected with the delivery outlet Vout of voltage stabilizing chip U9, the output terminal of isolation optocoupler U10 is also connected with the anode of diode D13, and the negative electrode of diode D13 is the output signal S+ of described signal output apparatus; Power circuit has ground line output terminal and fire wire output end VSS, and the fire wire output end VSS of power circuit is connected with the input port Vin of voltage stabilizing chip U9.
During concrete enforcement, the electric capacity (C23 and C24) of 0.1 microfarad in parallel can be distinguished at the input end of voltage stabilizing chip and output terminal, for filtering.Because conventional single-chip microcomputer is that 3.3V powers, so voltage stabilizing chip can select output signal for the voltage stabilizing chip of 3.3V.The anode of the integrated light emitting diode of input end of isolation optocoupler is connected to the power supply 3.3V of single-chip microcomputer, and its negative electrode is connected with single-chip processor i/o mouth.Can also connecting between the emitting stage of the integrated phototriode of output terminal of isolation optocoupler and the output terminal of voltage stabilizing chip a resistance, for controlling the size of output current, realizing with two resistance R42 and R46 in parallel in Fig. 1.
The output terminal of described isolation optocoupler U10 is connected to the anode of described diode D13 by the resistance R51 that series connection resistance is 330 ohm; The input end of described isolation optocoupler U10 is connected to the I/O mouth S+ of described single-chip microcomputer by the resistance R44 that series connection resistance is 220 ohm.
The fire wire output end of described power circuit is connected by the input port of protection circuit with voltage stabilizing chip; protection circuit comprises PNP type triode Q4; the base stage of PNP type triode Q4 is by the first divider resistance R53 ground connection; one end that first divider resistance 53 is connected with PNP type triode Q4 is connected to the fire wire output end of power circuit by the second divider resistance R47; the emitter of PNP type triode is connected to the fire wire output end of power circuit by current-limiting resistance R45, the collector of PNP type triode is connected to the input port of voltage stabilizing chip.During concrete enforcement, can also on the second divider resistance R47 shunt capacitance C25, for filtering bus ripple.
The model of described voltage stabilizing chip U9 is LP2950.
The model of described isolation optocoupler U10 is TLP181 or LTV-356T, and the model of described diode D13 is IN4148.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (5)
1. SCM Based signal output apparatus, is characterized in that, comprises power circuit, voltage stabilizing chip and buffer circuit; Buffer circuit comprises isolation optocoupler and diode, single-chip processor i/o mouth is connected with the input end of isolation optocoupler, the output terminal of isolation optocoupler is connected with the delivery outlet of voltage stabilizing chip, the output terminal of isolation optocoupler is also connected with the anode of diode, and the negative electrode of diode is the output signal of described signal output apparatus; Power circuit has ground line output terminal and fire wire output end, and the fire wire output end of power circuit is connected with the input port of voltage stabilizing chip.
2. SCM Based signal output apparatus as claimed in claim 1, is characterized in that, the output terminal of described isolation optocoupler is connected to the anode of described diode by the resistance that series connection resistance is 330 ohm; The input end of described isolation optocoupler is connected to the I/O mouth of described single-chip microcomputer by the resistance that series connection resistance is 220 ohm.
3. SCM Based signal output apparatus as claimed in claim 1, it is characterized in that, the fire wire output end of described power circuit is connected by the input port of protection circuit with voltage stabilizing chip, protection circuit comprises PNP type triode, the base stage of PNP type triode is by the first divider resistance ground connection, one end that first divider resistance is connected with PNP type triode is connected to the fire wire output end of power circuit by the second divider resistance, the emitter of PNP type triode is connected to the fire wire output end of power circuit by current-limiting resistance, the collector of PNP type triode is connected to the input port of voltage stabilizing chip.
4. SCM Based signal output apparatus as claimed in claim 1, is characterized in that, the model of described voltage stabilizing chip is LP2950.
5. SCM Based signal output apparatus as claimed in claim 1, is characterized in that, the model of described isolation optocoupler is TLP181 or LTV-356T, and the model of described diode is IN4148.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420809178.6U CN204256446U (en) | 2014-12-19 | 2014-12-19 | SCM Based signal output apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420809178.6U CN204256446U (en) | 2014-12-19 | 2014-12-19 | SCM Based signal output apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204256446U true CN204256446U (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420809178.6U Expired - Fee Related CN204256446U (en) | 2014-12-19 | 2014-12-19 | SCM Based signal output apparatus |
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| Country | Link |
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| CN (1) | CN204256446U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249659A (en) * | 2016-08-31 | 2016-12-21 | 宁波祈禧智能科技股份有限公司 | A kind of circuit being obtained signal pulse by detection change in voltage |
| CN107332896A (en) * | 2017-06-23 | 2017-11-07 | 邢艺凡 | A kind of flaw detector control system and method under water |
-
2014
- 2014-12-19 CN CN201420809178.6U patent/CN204256446U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249659A (en) * | 2016-08-31 | 2016-12-21 | 宁波祈禧智能科技股份有限公司 | A kind of circuit being obtained signal pulse by detection change in voltage |
| CN107332896A (en) * | 2017-06-23 | 2017-11-07 | 邢艺凡 | A kind of flaw detector control system and method under water |
| CN107332896B (en) * | 2017-06-23 | 2021-09-24 | 中国计量大学 | Underwater flaw detector control system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20150408 Termination date: 20151219 |
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| EXPY | Termination of patent right or utility model |