CN211180589U - 1x2 matrix type selector output circuit based on single chip microcomputer control - Google Patents
1x2 matrix type selector output circuit based on single chip microcomputer control Download PDFInfo
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- CN211180589U CN211180589U CN201922254004.3U CN201922254004U CN211180589U CN 211180589 U CN211180589 U CN 211180589U CN 201922254004 U CN201922254004 U CN 201922254004U CN 211180589 U CN211180589 U CN 211180589U
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Abstract
The utility model discloses a 1x2 matrix type selector output circuit based on single chip microcomputer control, it includes three complementary triode unit: first triode unit QB1, second triode unit QB2, third triode unit QB3, first triode unit QB1 the second triode unit QB2 with third triode unit QB3 connects jointly for realize single-control's dual output temperature or mode selection circuit. The utility model discloses abandon special multichannel and select output chip circuit, reduce the hardware cost in the design process, abandon mechanical button's matrix output circuit, reduce the shortcoming of mechanical shake, based on the logic circuit of complementary type triode, realize the dual output type selection circuit of single IO control, reduce the singlechip IO mouth control resource of double-circuit output, realize 2 times extension matrix output circuit, reduce cost, long circuit working life, the precision is high, the output signal of telecommunication is stable, promote the performance of household electrical appliances class complete machine control panel.
Description
Technical Field
The utility model belongs to the technical field of the automatically controlled board of kitchen electricity class, concretely relates to 1x2 matrix type selector output circuit based on single chip microcomputer control.
Background
The following methods are generally adopted in the market for the home electronics matrix type multiplexer output circuit:
1. a special multi-path selection output chip similar to 74L S153 is adopted, but the chip cost is high, the matrix arrangement output types are few, and in addition, excessive ADC port resources of a single chip microcomputer are additionally occupied.
2. The matrix output circuit is similar to the mechanical key type, but has the disadvantages of expensive key cost, short mechanical life, low reliability and the like.
In the past, research and development personnel or enterprises neglect innovation and improvement of the part of application due to ink conservation and formation rules and technical improvement limitation, and directly cause objective phenomena of low product reliability, high development process cost, reduced brand quality and the like.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model provides a 1X2 matrix type selector output circuit based on single chip microcomputer control, through the connection of complementary type triode, reduce hardware cost low, realize occupying the little and excellent performance 1X2 matrix type selection output circuit of singlechip resource.
The utility model adopts the technical proposal that:
a single chip microcomputer controlled 1x2 matrix selector output circuit comprises three complementary triode units: first triode unit QB1, second triode unit QB2, third triode unit QB3, first triode unit QB1 the second triode unit QB2 with third triode unit QB3 connects jointly for realize the temperature or the mode selection of single control dual output.
Preferably, the temperature or mode selection circuit is a temperature selection resistance detection output or a mode selection resistance detection output, respectively.
Preferably, the first, second, and third transistor units QB1, QB2, and QB3 are commonly connected as: an input terminal RD _ BIN _ NTC signal is connected to a base of the first transistor unit QB1 and a base of the third transistor unit QB3, an emitter of the first transistor unit QB1 is connected to an emitter of the second transistor unit QB2 and an emitter of the third transistor unit QB3 and is coupled to a power supply VDD-UC, and a collector series resistor R _ RD _ NTC and a parallel capacitor C8 of the first transistor unit QB1 are connected to output a signal RD _ NTC;
a collector of the third triode unit QB3 is connected with a base of the second triode unit QB2, and a series resistor R7 is connected with the ground; and the collector of the second triode unit QB2 is connected in series with a resistor R _ RD _ BIN and a parallel resistor C7 to output a signal RD _ BIN.
Preferably, the circuit structure of the first triode unit QB1 is the same as the circuit structure of the second triode unit QB2 and the circuit structure of the third triode unit QB3, the circuit structure of the first triode unit QB1 comprises a triode QB, a resistor RA and a resistor RB, the emitter of the triode QB is connected in series with the base of the triode QB connected behind the resistor RB, and the base of the triode QB is connected in series with the resistor RA.
Preferably, the resistor R _ RD _ NTC is a temperature-selective loop current-limiting resistor.
Preferably, the resistor R _ RD _ NTC is a loop current limiting resistor for mode selection.
Preferably, the resistor R7 is a bias resistor.
Preferably, the input end RD _ BIN _ NTC signal is a single IO control signal output by the single chip microcomputer.
Compared with the prior art, the utility model discloses logic circuit based on complementary type triode realizes the dual output type selection circuit of single IO control, reduces the singlechip IO mouth control resource of double-circuit output, realizes 2 times extension matrix output circuit, and reduce cost, circuit long service life, precision are high, and the output signal of telecommunication is stable, promotes the performance of household electrical appliances class complete machine control panel.
Drawings
Fig. 1 is a circuit diagram of an output circuit of a 1x2 matrix selector based on single chip microcomputer control according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the present invention provides a 1x2 matrix type selector output circuit based on single chip microcomputer control, as shown in fig. 1, which includes three complementary triode units: first triode unit QB1, second triode unit QB2, third triode unit QB3, first triode unit QB1 the second triode unit QB2 with third triode unit QB3 connects jointly for realize the temperature or the mode selection of single control dual output.
Like this, adopt above-mentioned structure, the utility model discloses a connection of complementary type triode reduces the hardware cost low, realizes occupying the little and excellent performance's of singlechip resource 1X2 matrix selection output circuit.
The temperature or mode selection is a temperature selection resistance detection output or a mode selection resistance detection output, respectively, for outputting a temperature selection resistance detection signal or a mode selection resistance detection signal.
The first triode unit QB1, the second triode unit QB2, and the third triode unit QB3 are connected together as: input RD _ BIN _ NTC signal connection the base of first triode unit QB1 and the base of third triode unit QB3, the emitter of first triode unit QB1 is connected the emitter of second triode unit QB2 with the emitter of third triode unit QB3 and power VDD-UC, output signal RD _ NTC behind collector series resistance R _ RD _ NTC, the parallel capacitance C8 of first triode unit QB1, wherein resistance R _ RD _ NTC is the return circuit current-limiting resistance of temperature selection.
A collector of the third triode unit QB3 is connected with a base of the second triode unit QB2, and a series resistor R7 is connected with the ground; the collector of the second triode unit QB2 is connected in series with a resistor R _ RD _ BIN and a parallel resistor C7 to output a signal RD _ BIN, wherein the resistor R _ RD _ NTC is a loop current limiting resistor for mode selection. The resistor R7 is a bias resistor, and the input end RD _ BIN _ NTC signal is a single IO control signal output by the single chip microcomputer.
The circuit structure of first triode unit QB1 with the circuit structure of second triode unit QB2, third triode unit QB 3's circuit structure is all the same, the circuit structure of first triode unit QB1 includes triode QB, resistance RA and resistance RB, triode QB's projecting pole is established ties connect behind the resistance RB the base of triode QB, triode QB's base is established ties resistance RA.
Thereby obtaining a two-way RD _ BIN/RD _ NTC exclusive OR output controlled by the RD _ BIN _ NTC single way. The working principle is as follows:
when RD _ BIN _ NTC is high, the resistance detection output is selected for the mode:
the first triode unit QB1 or the third triode unit QB3 is turned off; due to the action of the bias resistor R7, the second triode unit QB2 is in saturation conduction; the loop output signal RD _ BIN of the mode selection is at a high level VRD _ BIN ≈ VDD _ UC. R _ RD _ BIN is a current limiting resistor, which prevents R _ BIN 1-R _ BIN of the parallel resistor arrangement circuit from failing, over-temperature (the resistance becomes small and tends to 0), etc., thereby protecting the normal operation of the circuit and preventing the second triode unit QB2 and the third triode unit QB3 from being damaged by over-current.
When RD _ BIN _ NTC is low, the resistance detection output is selected for temperature:
the first triode unit QB1 or the third triode unit QB3 is in saturation conduction; the second triode unit QB2 is off; the loop output signal RD _ NTC of the temperature selection at this time is high level VRD _ NTC ≈ VDD _ UC. The R _ RD _ NTC is a current-limiting resistor, and the failure, the over-temperature (the resistance value becomes smaller and tends to be 0) and the like of the R _ NTC 1-R _ NTCn of the parallel resistor arrangement circuit are prevented, so that the normal work of the circuit is protected, and the overcurrent damage of the first triode unit QB1 is prevented.
The truth table is as follows:
| RD_BIN_NTC | RD_BIN | RD_NTC |
| 1 | 1 | 0 |
| 0 | 0 | 1 |
the utility model discloses abandon special multichannel and select output chip circuit, reduce the hardware cost in the design process, abandon mechanical button's matrix output circuit, reduce the shortcoming of mechanical shake, based on the logic circuit of complementary type triode, realize the dual output type selection circuit of single IO control, reduce the singlechip IO mouth control resource of double-circuit output, realize 2 times extension matrix output circuit, reduce cost, long circuit working life, the precision is high, the output signal of telecommunication is stable, promote the performance of household electrical appliances class complete machine control panel.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A1 x2 matrix type selector output circuit based on single chip microcomputer control is characterized in that the circuit comprises three complementary triode units: first triode unit QB1, second triode unit QB2, third triode unit QB3, first triode unit QB1 the second triode unit QB2 with third triode unit QB3 connects jointly for realize the temperature or the mode selection of single control dual output.
2. The single-chip microcomputer control-based selector output circuit of the 1x2 matrix type as claimed in claim 1, wherein the temperature or mode selection is a temperature-selective resistance detection output or a mode-selective resistance detection output, respectively.
3. The output circuit of claim 2, wherein the first, second, and third triode units QB1, QB2, and QB3 are commonly connected as: an input terminal RD _ BIN _ NTC signal is connected to a base of the first transistor unit QB1 and a base of the third transistor unit QB3, an emitter of the first transistor unit QB1 is connected to an emitter of the second transistor unit QB2 and an emitter of the third transistor unit QB3 and is coupled to a power supply VDD-UC, and a collector series resistor R _ RD _ NTC and a parallel capacitor C8 of the first transistor unit QB1 are connected to output a signal RD _ NTC;
a collector of the third triode unit QB3 is connected with a base of the second triode unit QB2, and a series resistor R7 is connected with the ground; and the collector of the second triode unit QB2 is connected in series with a resistor R _ RD _ BIN and a parallel resistor C7 to output a signal RD _ BIN.
4. The single chip microcomputer controlled 1x2 matrix type selector output circuit according to claim 3, wherein the first transistor unit QB1 has the same circuit structure as the second transistor unit QB2 and the third transistor unit QB3, the first transistor unit QB1 has a circuit structure including a transistor QB, a resistor RA and a resistor RB, an emitter of the transistor QB is connected in series with the resistor RB and then connected to a base of the transistor QB, and a base of the transistor QB is connected in series with the resistor RA.
5. The SCM-based 1x2 matrix type selector output circuit of claim 3, wherein the resistor R _ RD _ NTC is a temperature-selective loop current-limiting resistor.
6. The output circuit of claim 3, wherein the resistor R _ RD _ NTC is a loop current limiting resistor for mode selection.
7. The single-chip microcomputer control-based 1x2 matrix selector output circuit as claimed in claim 3, wherein the resistor R7 is a bias resistor.
8. The output circuit of claim 3, wherein the input terminal RD _ BIN _ NTC signal is a single IO control signal outputted from the single chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922254004.3U CN211180589U (en) | 2019-12-16 | 2019-12-16 | 1x2 matrix type selector output circuit based on single chip microcomputer control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922254004.3U CN211180589U (en) | 2019-12-16 | 2019-12-16 | 1x2 matrix type selector output circuit based on single chip microcomputer control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211180589U true CN211180589U (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922254004.3U Active CN211180589U (en) | 2019-12-16 | 2019-12-16 | 1x2 matrix type selector output circuit based on single chip microcomputer control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211180589U (en) |
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2019
- 2019-12-16 CN CN201922254004.3U patent/CN211180589U/en active Active
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