CN109560805B - Single-key electronic switch circuit - Google Patents
Single-key electronic switch circuit Download PDFInfo
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- CN109560805B CN109560805B CN201811630988.4A CN201811630988A CN109560805B CN 109560805 B CN109560805 B CN 109560805B CN 201811630988 A CN201811630988 A CN 201811630988A CN 109560805 B CN109560805 B CN 109560805B
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- 239000003990 capacitor Substances 0.000 claims description 57
- 238000005299 abrasion Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/0081—Power supply means, e.g. to the switch driver
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Abstract
The single-key electronic switch circuit is provided with an output switch unit, a voltage dividing unit, a driving switch and an output voltage control unit. In the practical application process, the output switch unit is used for outputting voltage, outputting the output voltage of the power supply Vcc to an external load, and supplying power to the load; the voltage dividing unit plays a role in voltage division, and when a user presses the driving switch, the output voltage of the voltage dividing unit is input into the output voltage control unit; the output voltage control unit controls the output switch unit to be turned on or turned off by utilizing the output voltage of the voltage dividing unit. The invention is not easy to generate mechanical abrasion, the service life of the circuit is long, the occurrence rate of touch errors is small, and the electronic product is stably in a standby state by conducting or disconnecting by utilizing an electric signal.
Description
Technical Field
The invention relates to the technical field of standby, in particular to a single-key electronic switch circuit.
Background
Currently, electronic products are related products based on electric energy, and mainly include: watches, smart phones, televisions, video discs, video recorders, camcorders, radios, radio cassettes, combination speakers, compact discs, computers, mobile communication products, and the like. The early products were named electronic products because they were mainly based on electronic tubes. The first generation of electronic products uses an electron tube as a core. The first semiconductor triode is produced in the last forty years world, is rapidly applied to various countries by the characteristics of small size, portability, power saving, long service life and the like, and replaces the electronic tube in a large range. In the last fifty years, the world has seen the first integrated circuit that has integrated many electronic components, such as transistors, on a silicon chip, allowing the electronic products to be miniaturized. Integrated circuits are rapidly evolving from small-scale integrated circuits to large-scale integrated circuits and very large-scale integrated circuits, so that electronic products are evolving towards high efficiency, low consumption, high precision, high stability and intellectualization.
Taking a computer as an example, the computer has a standby function as other types of electronic products, and when the user does not need to use the computer temporarily, the computer can start the standby function. The existing standby function is usually that after a user presses a standby button, a computer starts the standby function, but the existing standby button is a mechanical switch, and the type of most standby buttons is a mechanical switch, so that the standby circuit is turned on or off by utilizing mechanical force, but because the mechanical switch has special physical characteristics, when the mechanical switch is pressed by the user, the mechanical switch is possibly in place due to insufficient contact, namely, the touch has errors, so that the standby circuit cannot be normally started, and the computer cannot normally enter the standby function; in addition, after the existing mechanical switch is used for a period of time, the mechanical switch can be worn to a certain extent, so that the mechanical switch cannot be normally used, namely the service life of the mechanical switch is short; furthermore, the mechanical switch adopts a physical touch mode to realize the function, and when the standby circuit is turned on or turned off, a certain time difference is generated by the physical touch, so that the computer does not enter the standby state within a normal time range.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the single-key electronic switch circuit which is not easy to generate mechanical abrasion, has long service life and small occurrence rate of touch errors, and is switched on or off by utilizing an electric signal, so that an electronic product stably enters a standby state.
The aim of the invention is realized by the following technical scheme:
A single-button electronic switching circuit comprising:
The output switch unit is connected with the input end of the power supply Vcc, and the output end of the output switch unit is connected with the input end of the external load;
The input end of the voltage division unit is connected with the output end of the power supply Vcc;
One end of the driving switch is connected with the output end of the voltage dividing unit; and
The output voltage control unit, the first input of output voltage control unit with the output of bleeder unit is connected, the second input of output voltage control unit with the other end of drive switch is connected, the feedback input of output voltage control unit with the output of output switch unit is connected, the feedback output of output voltage control unit with the second input of output voltage control unit is connected, the control output of output voltage control unit with the control input of output switch unit is connected.
In one embodiment, the output switch unit includes a first switch tube Q1 and a second resistor R2, an emitter of the first switch tube Q1 is used as an input end of the output switch unit, a collector of the first switch tube Q1 is used as an output end of the output switch unit, a base of the first switch tube Q1 is used as a control input end of the output switch unit, one end of the second resistor R2 is connected with the emitter of the first switch tube Q1, and the other end of the second resistor R2 is connected with a base of the first switch tube Q1.
In one embodiment, the first switching tube Q1 is a PNP switching tube.
In one embodiment, the resistance of the second resistor R2 is equal to 1mΩ.
In one embodiment, the voltage dividing unit includes a first resistor R1 and a fifth resistor R5, one end of the first resistor R1 is used as an input end of the voltage dividing unit, the other end of the first resistor R1 is used as an output end of the voltage dividing unit, one end of the fifth resistor R5 is connected with the other end of the first resistor R1, and the other end of the fifth resistor R5 is grounded.
In one embodiment, the resistance of the first resistor R1 is equal to 1.5mΩ, and the resistance of the fifth resistor R5 is equal to 470 Ω.
In one embodiment, the output voltage control unit includes a first capacitor C1, a second capacitor C2, a third resistor R3, a sixth resistor R6, a seventh resistor R7, and a second switching tube Q2, one end of the first capacitor C1 is used as a first input end of the output voltage control unit, the other end of the first capacitor C1 is connected to one end of the sixth resistor R6 and one end of the seventh resistor R7, the other end of the sixth resistor R6 is used as a second input end of the output voltage control unit, the other end of the seventh resistor R7 is grounded, one end of the second capacitor C2 is connected to one end of the sixth resistor R6, the other end of the second capacitor C2 is connected to the other end of the sixth resistor R6, one end of the third resistor R3 is used as a feedback input end of the output voltage control unit, the other end of the third resistor R3 is used as a feedback output end of the output voltage control unit, the other end of the second switching tube Q2 is connected to the second base of the second capacitor C2 and the other end of the second switching tube Q2 is connected to the second base of the output voltage control unit.
In one embodiment, the second switching tube Q2 is an NPN switching tube.
In one embodiment, the capacitance value of the first capacitor C1 is equal to 0.22uF, and the capacitance value of the second capacitor C2 is equal to 10nF.
In one embodiment, the third resistor R3 has a resistance equal to 220kΩ, the sixth resistor R6 has a resistance equal to 100kΩ, and the seventh resistor R7 has a resistance equal to 4.7kΩ.
Compared with the prior art, the invention has the following advantages:
The single-key electronic switch circuit is provided with an output switch unit, a voltage dividing unit, a driving switch and an output voltage control unit. In the practical application process, the output switch unit is used for outputting voltage, outputting the output voltage of the power supply Vcc to an external load, and supplying power to the load; the voltage dividing unit plays a role in voltage division, and when a user presses the driving switch, the output voltage of the voltage dividing unit is input into the output voltage control unit; the output voltage control unit controls the output switch unit to be turned on or turned off by utilizing the output voltage of the voltage dividing unit. The invention is not easy to generate mechanical abrasion, the service life of the circuit is long, the occurrence rate of touch errors is small, and the electronic product is stably in a standby state by conducting or disconnecting by utilizing an electric signal.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a single-button electronic switch circuit according to an embodiment of the present invention;
Fig. 2 is a schematic circuit diagram of a single-button electronic switch circuit according to an embodiment of the invention.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a single-key electronic switch circuit 10 includes an output switch unit 100, a voltage dividing unit 200, a driving switch 300 and an output voltage control unit 400.
Referring to fig. 1 again, the input end of the output switch unit 100 is connected to the output end of the power source Vcc, and the output end of the output switch unit 100 is connected to the input end of the external load.
In this way, the output switch unit 100 is configured to output the output voltage of the power source Vcc to the external load, and supply power to the load.
Referring to fig. 1 again, the input terminal of the voltage dividing unit 200 is connected to the output terminal of the power source Vcc.
In this way, the voltage dividing unit 200 performs a voltage dividing function.
Referring to fig. 1 again, one end of the driving switch 300 is connected to the output end of the voltage dividing unit 200.
In this way, it should be noted that, the driving switch 300 is a single-key electronic switch circuit 10, and when the user presses the driving switch 300 for the first time, the single-key electronic switch circuit 10 starts to operate, so that the electronic product enters a standby state; when the user presses the driving switch 300 for the second time, the single-key electronic switch circuit 10 does not operate, and resets the electronic product to an initial state.
Referring to fig. 1 again, a first input terminal of the output voltage control unit 400 is connected to an output terminal of the voltage dividing unit 200, a second input terminal of the output voltage control unit 400 is connected to the other terminal of the driving switch 300, a feedback input terminal of the output voltage control unit 400 is connected to an output terminal of the output switch unit 100, a feedback output terminal of the output voltage control unit 400 is connected to a second input terminal of the output voltage control unit 400, and a control output terminal of the output voltage control unit 400 is connected to a control input terminal of the output switch unit 100.
In this manner, when the user presses the driving switch 300, the output voltage of the voltage dividing unit 200 is input to the output voltage control unit 400; the output voltage control unit 400 controls the output switching unit 100 to be turned on or off using the output voltage of the voltage dividing unit.
Further, referring to fig. 1 and 2 again, in an embodiment, the output switch unit 100 includes a first switch tube Q1 and a second resistor R2, an emitter of the first switch tube Q1 is used as an input end of the output switch unit 100, a collector of the first switch tube Q1 is used as an output end of the output switch unit 100, a base of the first switch tube Q1 is used as a control input end of the output switch unit 100, one end of the second resistor R2 is connected with the emitter of the first switch tube Q1, and the other end of the second resistor R2 is connected with the base of the first switch tube Q1.
In this way, it should be noted that, when the output switch unit 100 starts to operate, the output voltage control unit 400 outputs a control signal to the first switch tube Q1 in the output switch unit 100 to turn on the first switch tube Q1, that is, the output switch unit 100 starts to operate, the voltage of the power supply Vcc may be stably output to the external load, and enter the standby state; when the output switch unit 100 is not started, the output voltage control unit 400 outputs a control signal to the first switch tube Q1 of the output switch unit 100, and the first switch tube Q1 is turned off, that is, the output switch unit 100 is not started, the voltage of the power supply Vcc cannot be output to the external load, and the power supply Vcc is reset to the initial state; the second resistor R2 is a bias resistor, and provides a driving voltage for the conduction of the first switching tube Q1.
Specifically, referring to fig. 2 again, in an embodiment, the first switching tube Q1 is a PNP switching tube.
In this way, it should be noted that the type of the first switching tube Q1 may be flexibly selected according to the actual requirement.
Specifically, referring to fig. 2 again, in an embodiment, the resistance of the second resistor R2 is equal to 1mΩ.
In this way, it should be noted that the resistance value of the second resistor R2 can be flexibly selected according to the actual requirement.
Further, referring to fig. 1 and 2 again, in an embodiment, the voltage dividing unit 200 includes a first resistor R1 and a fifth resistor R5, one end of the first resistor R1 is used as an input end of the voltage dividing unit 200, the other end of the first resistor R1 is used as an output end of the voltage dividing unit 200, one end of the fifth resistor R5 is connected to the other end of the first resistor R1, and the other end of the fifth resistor R5 is grounded.
In this way, the voltage dividing unit 200 performs a voltage dividing function, and the first resistor R1 and the fifth resistor R5 together perform a voltage dividing function, and the divided voltage is input to the output voltage control unit 400 to prepare for subsequent on or off.
Specifically, referring to fig. 2 again, in an embodiment, the resistance of the first resistor R1 is equal to 1.5mΩ, and the resistance of the fifth resistor R5 is equal to 470 Ω.
In this way, it should be noted that the resistance of the first resistor R1 and the resistance of the fifth resistor R5 can be flexibly selected according to practical needs.
Further, referring to fig. 2 again, in an embodiment, the output voltage control unit 400 includes a first capacitor C1, a second capacitor C2, a third resistor R3, a sixth resistor R6, a seventh resistor R7, and a second switching tube Q2, one end of the first capacitor C1 is used as a first input end of the output voltage control unit 400, the other end of the first capacitor C1 is connected to one end of the sixth resistor R6 and one end of the seventh resistor R7, the other end of the sixth resistor R6 is used as a second input end of the output voltage control unit 400, the other end of the seventh resistor R7 is grounded, one end of the second capacitor C2 is connected to one end of the sixth resistor R6, the other end of the second capacitor C2 is connected to the other end of the sixth resistor R6, one end of the third resistor R3 is used as a feedback input end of the output voltage control unit 400, the emitter of the second switching tube Q2 is connected to one end of the second capacitor C2, the other end of the second switching tube Q2 is connected to the base of the second resistor C2 as a feedback input end of the output voltage control unit 400.
In this way, when the output voltage control unit 400 starts to operate, the second switching tube Q2 outputs a control signal to the output switching unit 100, and turns on the output switching unit 100, so that the output voltage of the power Vcc is output to the external load, and enters the standby state; when the second switching tube Q2 outputs a control signal to the output switching unit 100 and turns off the output switching unit 100, the output voltage of the power supply Vcc cannot be output to the external load, and is reset to the initial state; the first capacitor C1 plays a role of charge and discharge and is used for switching on or off the second switching tube Q2; the second capacitor C2 plays a role in temporarily storing voltage signals, ensures effective conduction of the second switching tube Q2, and plays a role in filtering; the third resistor R3 plays a role of feedback; the sixth resistor R6 is a bias resistor and provides a driving voltage for conducting the second switching tube Q2; the seventh resistor R7 plays a role in voltage boosting.
Specifically, referring to fig. 2 again, in an embodiment, the second switching tube Q2 is an NPN switching tube.
In this way, it should be noted that the type of the second switching tube Q2 may be flexibly selected according to the actual requirement.
Specifically, referring to fig. 2 again, in one embodiment, the capacitance of the first capacitor C1 is equal to 0.22uF, and the capacitance of the second capacitor C2 is equal to 10nF.
In this way, it should be noted that the capacitance value of the first capacitor C1 and the capacitance value of the second capacitor C2 can be flexibly selected according to practical needs.
Specifically, referring to fig. 2 again, in an embodiment, the resistance of the third resistor R3 is equal to 220kΩ, the resistance of the sixth resistor R6 is equal to 100kΩ, and the resistance of the seventh resistor R7 is equal to 4.7kΩ.
In this way, the resistance of the third resistor R3, the resistance of the sixth resistor R6, and the resistance of the seventh resistor R7 can be flexibly selected according to the actual needs.
Example 1
Referring to fig. 2 again, in this embodiment, the voltage value of the power supply Vcc is equal to 5V, the first switching tube Q1 is a PNP switching tube, the resistance value of the second resistor R2 is equal to 1mΩ, the resistance value of the first resistor R1 is equal to 1.5mΩ, the resistance value of the fifth resistor R5 is equal to 470 Ω, the second switching tube Q2 is an NPN switching tube, the capacitance value of the first capacitor C1 is equal to 0.22uF, the capacitance value of the second capacitor C2 is equal to 10nF, the resistance value of the third resistor R3 is equal to 220kΩ, the resistance value of the sixth resistor R6 is equal to 100kΩ, and the resistance value of the seventh resistor R7 is equal to 4.7kΩ.
Since the first resistor R1 and the fifth resistor R5 form a typical voltage divider circuit, the first resistor R1 has a large resistance, and therefore, the current consumed in the first resistor R1 is very small and can be basically ignored, so that the single-key electronic switch circuit 10 can be applied to an electronic product for a long time, and the problem of excessive power consumption of the electronic product caused by continuously starting the single-key electronic switch circuit 10 is not required.
The voltage at the center point of the first resistor R1 and the fifth resistor R5 is 1.193V, the voltage at the center point is the voltage value of the connection point between the first resistor R1 and the fifth resistor R5, at this time, the power supply Vcc, the first resistor R1, the first resistor C1, the seventh resistor R7 and the ground GND form a charging loop, the first capacitor C1 is charged with the voltage value of 1.193V under the charging operation of the voltage at the center point, and the first capacitor C1 is charged with the voltage of 1.193V, which is positive and negative.
When the user presses the driving switch 300 for the first time, since the first capacitor C1 is a voltage with positive left and negative right, the first capacitor C1 has a discharging loop, the first capacitor C1 will start discharging, the discharging loop is the first capacitor C1-driving switch 300-sixth resistor R6-second capacitor C2-second switch Q2-first capacitor C1, since the sixth resistor R6, the second capacitor C2 and the second switch Q2 have a parallel connection relationship, the discharging current will pass through these three components at the same time, the discharging result of the first capacitor C1 will generate a voltage signal with positive top and negative bottom on the sixth resistor R6, the upper positive and the lower negative voltage signals will turn on the second switch Q2, the first switch Q1 will also be turned on after the second switch Q2 is turned on, and at the same time, the output end of the power supply Vcc will output a stable 4V voltage signal to the collector through the third resistor R3, and the collector electrode of the power supply Vcc will enter the standby state.
As can be seen from the above description, after the first capacitor C1 is charged, there is a voltage signal with positive left and negative right on the first capacitor C1, when the user presses the driving switch 300 for the first time, the first capacitor C1 starts to discharge, at this time, a discharge current flows through the seventh resistor R7, and the discharge current flowing through the seventh resistor R7 generates a voltage on the seventh resistor R7, which is greater than the voltage value of 4V output by the power source Vcc, at this time, the voltage difference with low left and right on the first capacitor C1 is inverted to a voltage difference with high left and right, i.e. at this time, the first capacitor C1 is positive left and negative right. When the user presses the driving switch 300 for the second time, the first capacitor C1 starts to discharge again, and the voltage on the first capacitor C1 is positive and negative, so that the discharge loop is reversed, the discharge loop is reversed to form the first capacitor C1-the sixth resistor R6-the driving switch 300-the first capacitor C1, and the discharge current at this time generates a voltage signal on the sixth resistor R6. Since the charging voltage of the first capacitor C1 is higher at this time, the voltage signal generated by discharging will be higher, and the reverse voltage signal will jump out the second switching tube Q2 to the on state, that is, the second switching tube Q2 will be directly returned to the off state, so as to return the single-key electronic switching circuit 10 to the initial state.
The application skillfully utilizes the flow direction of the charge and discharge current of the first capacitor C1, so that the polarity of the voltage signal on the first capacitor C1 is reversed back and forth, and then the on or off of the two switching tubes of the later stage are controlled. The application is different from the prior art that the electronic product enters the standby state by using the mechanical switch, wherein the electronic product can enter the standby state at the moment when the user presses the driving switch 300 for the first time, the prior mechanical switch has the advantages that the user needs to use larger pressing force and pressing time to act on the mechanical switch due to physical contact, the abrasion of the mechanical switch can be definitely increased, the service life of the mechanical switch is reduced, and certain contact error can be generated when the mechanical switch is not in place or is not in enough contact, and the electronic product can enter the standby state at the moment when the driving switch 300 is pressed for the first time; in addition, the application also combines the reversal of the potential difference on the first capacitor C1 to control the on or off of the first switching tube Q1 and the second switching tube Q2 so as to lead the electronic product to enter the standby state, and the traditional mechanical switch adopts physical touch to lead the electronic product to enter the standby state, thus having the essential difference. The application utilizes the electric signal to control whether the single-button electronic switch circuit 10 starts working, and adopts the electric signal to start the mode that firstly, the mode is stable, secondly, the mechanical abrasion can not occur, and the service life is long; and thirdly, compared with a mechanical switch, the circuit is more sensitive in response, namely the incidence rate of touch errors is smaller.
The single-key electronic switch circuit is provided with an output switch unit, a voltage dividing unit, a driving switch and an output voltage control unit. In the practical application process, the output switch unit is used for outputting voltage, outputting the output voltage of the power supply Vcc to an external load, and supplying power to the load; the voltage dividing unit plays a role in voltage division, and when a user presses the driving switch, the output voltage of the voltage dividing unit is input into the output voltage control unit; the output voltage control unit controls the output switch unit to be turned on or turned off by utilizing the output voltage of the voltage dividing unit. The invention is not easy to generate mechanical abrasion, the service life of the circuit is long, the occurrence rate of touch errors is small, and the electronic product is stably in a standby state by conducting or disconnecting by utilizing an electric signal.
The above embodiments represent only a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (7)
1. A single-button electronic switching circuit, comprising:
The output switch unit is connected with the input end of the power supply Vcc, and the output end of the output switch unit is connected with the input end of the external load;
The input end of the voltage division unit is connected with the output end of the power supply Vcc;
One end of the driving switch is connected with the output end of the voltage dividing unit; and
The first input end of the output voltage control unit is connected with the output end of the voltage dividing unit, the second input end of the output voltage control unit is connected with the other end of the driving switch, the feedback input end of the output voltage control unit is connected with the output end of the output switch unit, the feedback output end of the output voltage control unit is connected with the second input end of the output voltage control unit, and the control output end of the output voltage control unit is connected with the control input end of the output switch unit;
The output switch unit comprises a first switch tube Q1 and a second resistor R2, wherein an emitter of the first switch tube Q1 is used as an input end of the output switch unit, a collector of the first switch tube Q1 is used as an output end of the output switch unit, a base of the first switch tube Q1 is used as a control input end of the output switch unit, one end of the second resistor R2 is connected with the emitter of the first switch tube Q1, and the other end of the second resistor R2 is connected with a base of the first switch tube Q1;
The voltage division unit comprises a first resistor R1 and a fifth resistor R5, one end of the first resistor R1 is used as an input end of the voltage division unit, the other end of the first resistor R1 is used as an output end of the voltage division unit, one end of the fifth resistor R5 is connected with the other end of the first resistor R1, and the other end of the fifth resistor R5 is grounded;
The output voltage control unit comprises a first capacitor C1, a second capacitor C2, a third resistor R3, a sixth resistor R6, a seventh resistor R7 and a second switch tube Q2, one end of the first capacitor C1 is used as a first input end of the output voltage control unit, the other end of the first capacitor C1 is respectively connected with one end of the sixth resistor R6 and one end of the seventh resistor R7, the other end of the sixth resistor R6 is used as a second input end of the output voltage control unit, the other end of the seventh resistor R7 is grounded, one end of the second capacitor C2 is connected with one end of the sixth resistor R6, the other end of the second capacitor C2 is connected with the other end of the sixth resistor R6, one end of the third resistor R3 is used as a feedback input end of the output voltage control unit, the other end of the third resistor R3 is used as a feedback output end of the output voltage control unit, the other end of the second switch tube Q2 is connected with the second capacitor C2, and the other end of the second capacitor C2 is connected with the output end of the second switch tube Q2.
2. The single-key electronic switching circuit according to claim 1, wherein the first switching tube Q1 is a PNP switching tube.
3. The single-key electronic switching circuit according to claim 1, wherein the resistance value of the second resistor R2 is equal to 1mΩ.
4. The single-key electronic switch circuit according to claim 1, wherein the resistance of the first resistor R1 is equal to 1.5mΩ, and the resistance of the fifth resistor R5 is equal to 470 Ω.
5. The single-key electronic switching circuit according to claim 1, wherein the second switching tube Q2 is an NPN switching tube.
6. The single-key electronic switching circuit according to claim 1, wherein the capacitance value of the first capacitor C1 is equal to 0.22uF and the capacitance value of the second capacitor C2 is equal to 10nF.
7. The single-key electronic switching circuit according to claim 1, wherein the third resistor R3 has a resistance equal to 220kΩ, the sixth resistor R6 has a resistance equal to 100kΩ, and the seventh resistor R7 has a resistance equal to 4.7kΩ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811630988.4A CN109560805B (en) | 2018-12-29 | 2018-12-29 | Single-key electronic switch circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811630988.4A CN109560805B (en) | 2018-12-29 | 2018-12-29 | Single-key electronic switch circuit |
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| Publication Number | Publication Date |
|---|---|
| CN109560805A CN109560805A (en) | 2019-04-02 |
| CN109560805B true CN109560805B (en) | 2024-06-14 |
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| CN201811630988.4A Active CN109560805B (en) | 2018-12-29 | 2018-12-29 | Single-key electronic switch circuit |
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| KR101042783B1 (en) * | 2009-06-17 | 2011-06-20 | 하가전자 주식회사 | The Electronic Wall Mounted Switch |
| US9685950B2 (en) * | 2011-03-23 | 2017-06-20 | Shenzhen Ada Electronics Co., Ltd. | Energy-saving electronic touch switch |
| CN104215531B (en) * | 2013-05-30 | 2017-02-08 | 深圳市海洋王照明工程有限公司 | Key switch lift test circuit |
| CN203708214U (en) * | 2013-12-19 | 2014-07-09 | 深圳Tcl新技术有限公司 | One button-type control circuit and display equipment |
| CN105680840A (en) * | 2016-01-08 | 2016-06-15 | 成都市宏山科技有限公司 | Startup and shutdown circuit |
| CN105960070B (en) * | 2016-07-13 | 2017-09-29 | 福建捷联电子有限公司 | A kind of single feedback direct-push DC dimming LED lamp tube drive circuits |
| CN107918380A (en) * | 2017-11-30 | 2018-04-17 | 惠州市蓝微新源技术有限公司 | A kind of control circuit of MCU break-makes |
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