CN219718206U - Switch multiplexing control circuit and electronic equipment - Google Patents
Switch multiplexing control circuit and electronic equipment Download PDFInfo
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- CN219718206U CN219718206U CN202321046624.8U CN202321046624U CN219718206U CN 219718206 U CN219718206 U CN 219718206U CN 202321046624 U CN202321046624 U CN 202321046624U CN 219718206 U CN219718206 U CN 219718206U
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Abstract
The utility model discloses a switch multiplexing control circuit and electronic equipment, wherein the switch multiplexing control circuit comprises a battery activation signal end, a level signal end and a trigger switch, wherein the level signal end pulls up a level signal; the trigger switch is electrically connected with the battery activation signal end and the level signal end, and is grounded; when the trigger switch is triggered, the trigger switch enables the battery activation signal end to be grounded, and the level state of the level signal end is switched; when the trigger switch is not triggered, the current loop of the battery activation signal end to the direction of the level signal end is in an off state. According to the technical scheme, the number of keys of the electronic equipment is reduced, the cost of the electronic equipment is reduced, and the appearance of the electronic equipment is simpler.
Description
Technical Field
The present utility model relates to the field of switch control circuits, and in particular, to a switch multiplexing control circuit and an electronic device.
Background
At present, high-end switch batteries are used on more and more electronic devices, the high-end switch batteries are provided with battery activation signal ends, and the high-end switch batteries are activated and started only when the battery activation signal ends are short-circuited with a ground wire, so that power is supplied to the electronic devices. In the existing electronic devices, an activation key is separately arranged on the electronic device to control the starting and the closing of the high-end switch battery, a battery activation signal end is short-circuited with a ground wire by pressing the activation key so as to realize the starting of the high-end switch battery, and the battery activation signal end is disconnected with the ground wire by resetting and bouncing the activation key so as to realize the closing of the high-end switch battery.
Because the battery activation signal end of most high-end switch batteries is charged when the batteries are closed, if a key is activated to be multiplexed with other functions of the electronic equipment, the high-end switch batteries can discharge to other functional modules through the signal line connected with the key by the battery activation signal end in the closed state, so that the batteries are leaked through the activation signal end, and the cruising duration of the electronic equipment is shortened; therefore, the existing electronic device generally sets the activation keys of the high-end switch battery independently, but the number of keys of the electronic device is too large, the cost is high, and the appearance is not simple.
Disclosure of Invention
The utility model provides a switch multiplexing control circuit and electronic equipment, which aim to reduce the number of keys of the electronic equipment, reduce the cost and enable the appearance to be simpler.
In order to achieve the above object, the present utility model provides a switch multiplexing control circuit, comprising:
a battery activation signal terminal;
the level signal end pulls up the high level signal;
the trigger switch is electrically connected with the battery activation signal end and the level signal end and is grounded;
when the trigger switch triggers, the trigger switch enables the battery activation signal end to be grounded and switches the level state of the level signal end; when the trigger switch is not triggered, the current loop of the battery activation signal end to the level signal end is in an off state.
In some embodiments, the switch multiplexing control circuit further includes a unidirectional conduction unit, the level signal terminal is electrically connected to the trigger switch through the unidirectional conduction unit, and the unidirectional conduction unit is unidirectional conducted in a direction from the level signal terminal to the trigger switch.
In some embodiments, the trigger switch includes a ground terminal and a signal terminal, the ground terminal is grounded, the battery activated signal terminal is electrically connected to the signal terminal, and the level signal terminal is electrically connected to the signal terminal via the unidirectional conductive unit.
In some embodiments, the trigger switch includes at least one ground pin and two independent signal pins, wherein the ground pin is grounded, one signal pin is electrically connected with the battery activation signal terminal, the other signal pin is electrically connected with the level signal terminal, and the two signal pins are not connected; when the trigger switch is triggered, the two signal pins are communicated with the grounding pin; and when the trigger switch is not triggered, the two signal pins are disconnected with the grounding pin.
In some embodiments, the switch multiplexing control circuit further comprises a switch unit, and the level signal terminal is connected with the trigger switch through the switch unit; the switching unit comprises an on-off control end, a first connecting end and a second connecting end, wherein the on-off control end of the switching unit is electrically connected with the trigger switch, the first connecting end of the switching unit is electrically connected with the level signal end, and the second connecting end of the switching unit is grounded; and the switching unit switches the on-off state according to the level of the on-off control end.
In some embodiments, the switching unit includes a switching tube and a first resistor, where a trigger end, a first conducting end, and a second conducting end of the switching tube are sequentially corresponding to an on-off control end, a first connecting end, and a second connecting end of the switching unit, and the trigger end of the switching tube is electrically connected to a power supply through the first resistor.
In some embodiments, the switching tube is an NPN-type transistor, the trigger end, the first conductive end, and the second conductive end of the switching tube are sequentially a base, a collector, and an emitter of the NPN-type transistor, the base of the NPN-type transistor is connected in series with a resistor, and the collector of the NPN-type transistor is grounded through a resistor.
In some embodiments, the switch multiplexing control circuit further comprises a second resistor connected in series between the level signal terminal and the trigger switch, and a third resistor connected in series between the battery activation signal terminal and the trigger switch.
In some embodiments, the switch multiplexing control circuit further comprises a voltage regulator tube through which the battery activation signal terminal is connected to a ground.
The utility model also provides an electronic device which comprises a battery device, a functional device and the switch multiplexing control circuit, wherein the battery activation signal end is electrically connected with the battery device, and the level signal end is electrically connected with the functional device.
According to the technical scheme of the switch multiplexing control circuit, when the trigger switch is triggered, the trigger switch enables the battery activation signal end to be grounded, and the level state of the level signal end is switched, so that a low level signal of the battery activation signal end is realized to control the high-end switch battery to be activated and started, and meanwhile, the level state of the level signal end is switched to output different level signals to a functional module of a system, and the functional module is controlled to switch to work; when the trigger switch is not triggered, the current loop of the battery activation signal end in the direction of the level signal end is kept in an off state, so that the condition that the high-end switch battery discharges to a functional module of the system through the battery activation signal end is effectively prevented, and therefore, the electronic equipment using the switch multiplexing control circuit can realize that the high-end switch battery is controlled to be activated and started and closed by one trigger switch on the premise that the high-end switch battery is prevented from leaking electricity through the battery activation signal end, and meanwhile, the operation switching of the functional module of the control system is realized, the number of keys of the electronic equipment is reduced, the cost is reduced, and the appearance of the electronic equipment is simpler.
Drawings
FIG. 1 is a schematic diagram of a switch multiplexing control circuit according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a switch multiplexing control circuit according to a second embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a third embodiment of the switch multiplexing control circuit of the present utility model;
fig. 4 is a schematic structural diagram of a switch multiplexing control circuit according to a fourth embodiment of the present utility model;
fig. 5 is a schematic structural diagram of a fifth embodiment of the switch multiplexing control circuit of the present utility model;
fig. 6 is a circuit schematic diagram of a switch multiplexing control circuit according to a sixth embodiment of the utility model;
fig. 7 is a schematic structural diagram of an embodiment of the electronic device of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
It will also be understood that when an element is referred to as being "mounted" or "disposed" on 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.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
The utility model provides a switch multiplexing control circuit which is mainly applied to electronic equipment.
Referring to fig. 1, in the present embodiment, the switch multiplexing control circuit includes:
a battery activation signal terminal 10;
a level signal terminal 20, the level signal terminal 20 pulls up a high level signal vcc, which may be a functional signal power source, for example, a 5V power source, a 12V power source, etc. in the system;
the trigger switch 30, the trigger switch 30 connects the battery activation signal end 10 and the level signal end 20 electrically, and the trigger switch 30 is grounded;
when the trigger switch 30 triggers, the trigger switch 30 grounds the battery activation signal terminal 10 and switches the level state of the level signal terminal 20; when the trigger switch 30 is not triggered, the current loop of the battery activation signal terminal 10 in the direction of the level signal terminal 20 is in an off state.
The battery activation signal terminal 10 is configured to be connected to a battery device 200 (e.g., a high-side switch battery) of an electronic apparatus (refer to fig. 7), and the trigger switch 30 controls whether the battery activation signal terminal 10 provides a battery activation signal (i.e., a discharge activation signal) to the battery device 200, so as to control whether the battery device 200 is activated and started, i.e., whether the battery device 200 discharges and outputs. In this embodiment, the battery activation signal is a low level signal that is grounded.
The level signal terminal 20 is used for connecting with a functional device 300 (refer to fig. 7) of the electronic apparatus; when the trigger switch 30 triggers, the level state of the level signal end 20 is controlled to be switched, and the level state of the level signal end 20 is switched from a first level state to a second level state; when the trigger switch 30 is switched from the triggered state back to the non-triggered state, the control level signal terminal 20 is switched from the second level state back to the first level state. For example, the functional device 300 of the electronic apparatus may be activated when the first level state or the second level state of the level signal terminal 20 is received and may be deactivated when the second level state or the first level state of the level signal terminal 20 is received. The first level state is a high level state, and the second level state is a low level state; or, the first level state is a low level state and the second level state is a high level state.
For example, the function device 300 is a charging module of the electronic apparatus, when the trigger switch 30 is triggered, the battery device 200 receives a battery activation signal of the battery activation signal end, and the battery device 200 is activated and started to perform power supply output, at this time, the charging module receives a signal (a low level signal or a high level signal) of the second level state of the level signal end, and the charging module stops charging the battery device 200, so as to meet the functional requirement of not charging the electronic apparatus when the electronic apparatus is used (i.e. when the battery device supplies power and outputs), and avoid serious consequences such as damage or explosion of the battery device caused by using the electronic apparatus while charging. Of course, the functional device 300 may also be a module of other circuits in the electronic apparatus.
The trigger switch 30 may be a key switch, where the key is triggered in a pressed state and is not triggered in a pressed state; of course, the trigger switch 30 may be a toggle switch, a knob switch, or the like.
In addition, when the trigger switch 30 is not triggered, the current loop from the battery activation signal terminal 10 to the level signal terminal 20 is kept in an off state, so that the battery device 200 does not form a current loop from the battery activation signal terminal 10 and the level signal terminal 20 to the functional device 300, that is, the battery device 200 is ensured not to leak electricity through the battery activation signal terminal 10.
According to the technical scheme of the embodiment, when the trigger switch 30 is triggered, the trigger switch 30 enables the battery activation signal end 10 to be grounded, and the level state of the level signal end 20 is switched, so that a low-level signal is sent to the battery activation signal end 10 to control the high-side switch battery to be activated and started, and meanwhile, the level state of the level signal end 20 is switched to output different level signals to the functional device 300 of the system, and the functional device 300 is controlled to switch to work; when the trigger switch 30 is not triggered, the current loop of the battery activation signal end 10 in the direction of the level signal end 20 is kept in an off state, so that the situation that the high-end switch battery discharges to the functional device 300 of the system through the battery activation signal end 10 is effectively prevented, and therefore, the electronic equipment using the switch multiplexing control circuit of the embodiment can realize the activation starting and closing of the high-end battery controlled by one trigger switch 30 on the premise of avoiding the high-end switch battery from leaking electricity through the battery activation signal end 10, and simultaneously realize the work switching of the functional device 300 of the control system, thereby reducing the number of keys of the electronic equipment, reducing the cost and enabling the appearance of the electronic equipment to be simpler.
Referring to fig. 2, in some embodiments, the switch multiplexing control circuit further includes a unidirectional conduction unit 40, the level signal terminal 20 is electrically connected to the trigger switch 30 through the unidirectional conduction unit 40, and the unidirectional conduction unit 40 is unidirectional in a direction from the level signal terminal 20 to the trigger switch 30. In the embodiment, the unidirectional conducting unit 40 is exemplified by a diode; of course, in other embodiments, unidirectional conducting cell 40 may also be a device or circuit that functions in other similar ways.
Referring to fig. 2 again, in the present embodiment, the trigger switch 30 includes a ground terminal 31 and a signal terminal 32, the ground terminal 31 is grounded, the battery activated signal terminal 10 is electrically connected to the signal terminal 32, and the level signal terminal 20 is electrically connected to the signal terminal 32 via the unidirectional conducting unit 40. In this embodiment, the trigger switch 30 may be a common key switch, where the battery activation signal terminal 10 and the level signal terminal 20 are electrically connected to the same signal terminal 32 of the trigger switch 30, and of course, the key switch may be a four-corner key switch, that is, the signal terminal 32 may include two short-circuited pins for respectively electrically connecting the battery activation signal terminal 10 and the level signal terminal 20.
In this embodiment, only by connecting a unidirectional conduction unit 40 in series with the level signal terminal 20, it is realized that the current loop of the battery activation signal terminal 10 in the direction of the level signal terminal 20 is kept in an off state, and the circuit structure is simple, and the cost is low and reliable.
Referring to fig. 3, in some embodiments, the trigger switch 30 includes at least one (two in fig. 3 as an example) ground pin P1 and two independent signal pins P2, the ground pin P1 is grounded, one signal pin P2 is electrically connected to the battery activated signal terminal 10, the other signal pin P2 is electrically connected to the level signal terminal 20, and the two signal pins P2 are not connected; when the trigger switch 30 triggers, the two signal pins P2 are communicated with the grounding pin P1; when the trigger switch 30 is not triggered, the two signal pins P2 are disconnected from the ground pin P1.
In this embodiment, the trigger switch 30 adopts two unconnected signal pins P2, which are respectively and correspondingly electrically connected with the battery activation signal terminal 10 and the level signal terminal 20, so that even if the battery activation signal terminal 10 and the level signal terminal 20 are not in communication with each other in a physical circuit, the situation that the battery device 200 discharges to the functional device 300 through the battery activation signal terminal 10 is more directly and effectively avoided. In this embodiment, the trigger switch 30 adopts four independent pins, and when the trigger switch 30 is not triggered, the four independent pins are not conducted, and when the trigger switch 30 is triggered, the two signal pins P2 are respectively conducted with the corresponding grounding pins P1, but the two signal pins P2 are not directly conducted.
Referring to fig. 4, in some embodiments, the switch multiplexing control circuit further includes a switch unit 50, and the level signal terminal 20 is connected to the trigger switch 30 through the switch unit 50; the switch unit 50 comprises an on-off control end a, a first connection end b and a second connection end c, the on-off control end a of the switch unit 50 is electrically connected with the trigger switch 30, the first connection end b of the switch unit 50 is electrically connected with the level signal end 20, and the second connection end c of the switch unit 50 is grounded; the switching unit 50 performs on-off state switching according to the level of the on-off control terminal a. The switching unit 50 may be a switching tube circuit or a switching chip.
When the level signal terminal 20 is connected to the trigger switch 30 through the unidirectional conducting unit 40 (e.g. diode), if the battery activation signal terminal 10 and the level signal terminal 20 are connected to the same signal terminal 32 of the trigger switch 30, there is a voltage drop on the unidirectional single-pass unit 40 when the trigger switch 30 is triggered, and the voltage drop may affect the output of the level signal terminal 20 to a low level, resulting in affecting the control of the functional device. For this reason, in this embodiment, the level signal terminal is connected to the trigger switch 30 through the switch unit 50, and the unidirectional conduction unit 40 may be connected between the switch unit 50 and the trigger switch 30 in series, so that the trigger and non-trigger control of the trigger switch 30 switches the level state of the on-off control terminal a of the switch unit 50, and the level state of the level signal terminal 20 is switched by the on-off state of the switch unit 50; since the switching unit 50 needs to switch the on-off state when the voltage of the on-off control terminal a reaches the threshold value, the voltage drop on the unidirectional conduction end member 40 cannot reach the threshold value affecting the switching of the on-off state of the switching unit 50, and thus, the problem that the voltage drop of the unidirectional conduction unit 40 may affect the output of the level signal end 20 to be low is effectively eliminated.
Referring to fig. 5, in some embodiments, the switching unit 50 includes a switching tube Q and a first resistor R1, the trigger end, the first conducting end, and the second conducting end of the switching tube Q are sequentially corresponding to the on-off control end a, the first connecting end b, and the second connecting end c of the switching unit 50, and the trigger end of the switching tube Q is electrically connected to a power supply through the first resistor R1. The switching tube Q can be NPN triode, NOMS tube, PNP triode, PMOS tube, etc.
Referring to fig. 6, in this embodiment, the switching transistor Q is taken as an NPN type transistor for example. The trigger end, the first conducting end and the second conducting end of the switching tube Q are sequentially a base electrode, a collector electrode and an emitter electrode of an NPN type transistor, wherein the base electrode of the NPN type transistor is connected with a resistor in series, and the collector electrode of the NPN type transistor is grounded through the resistor.
The output signal of the level signal terminal 20 of the switch multiplexing control circuit of this embodiment is as follows: when the trigger switch 30 is not triggered, the base electrode of the NPN type triode is at a high level, the NPN type triode is conducted, the collector electrode of the NPN type triode is connected with the emitter electrode of the NPN type triode to be grounded, the collector electrode of the NPN type triode is at a low level, namely the level signal end 20 outputs a low level signal; when the trigger switch 30 triggers, the base of the NPN-type triode is at a low level, the NPN-type triode is not turned on, and the collector of the NPN-type triode is at a high level, i.e. the level signal terminal 20 outputs a high level signal.
If the switching tube Q is replaced by an NMOS tube, the output signal of the level signal end 20 of the switch multiplexing control circuit is unchanged because the on-off trigger conditions of the NMOS tube and the NPN tube are the same.
If the NPN transistor is replaced by the PNP transistor or the NMOS transistor in the switching transistor Q, the on/off triggering condition of the PNP transistor or the PMOS transistor is opposite to the on/off triggering condition of the NPN transistor, the condition of the output signal of the level signal terminal 20 of the switching multiplexing control circuit is opposite to the condition of the output signal of the level signal terminal 20 when the NPN transistor is adopted in the switching transistor Q, and thus will not be described herein.
Referring to fig. 6, in some embodiments, the switch multiplexing control circuit further includes a second resistor R2 and a third resistor R3, the second resistor R2 is connected in series between the level signal terminal 20 and the trigger switch 30, and the third resistor R3 is connected in series between the battery activation signal terminal 10 and the trigger switch 30. The second resistor R2 and the third resistor R3 are current limiting functions, respectively, and are used for preventing the instantaneous current of the level signal terminal 20 and the battery activation signal terminal 10 from being too large, so that the whole circuit and the device of the electronic equipment are damaged or the system is failed.
In some embodiments, the switch multiplexing control circuit further includes a regulator D1, and the battery activation signal terminal 10 is grounded via the regulator D1. The voltage stabilizing tube D1 is used for avoiding that the signal end 32 or the signal pin P2 of the trigger switch generates false trigger level signals to the battery activation signal end 10 and the level signal end 20 due to electromagnetic interference signals, so as to ensure the accuracy and reliability of the signals of the switch multiplexing control circuit.
The present utility model further provides an electronic device, which includes a battery device 200, a functional device 300 and a switch multiplexing control circuit 100, where the specific structure of the switch multiplexing control circuit 100 refers to the foregoing embodiments, and since the electronic device adopts all the technical solutions of all the embodiments of the switch multiplexing control circuit 100, at least the electronic device has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which are not described herein in detail. Wherein, the battery activation signal terminal 10 of the switch multiplexing control circuit 100 is electrically connected with the battery device 200, and the level signal terminal 20 is electrically connected with the functional device 300. The battery device 200 may be a high-end switch battery, or may be other types of battery modules; the functional device 300 may be an electrical module of any functional part of an electronic apparatus.
The above description of the preferred embodiments of the present utility model should not be taken as limiting the scope of the utility model, but rather should be understood to cover all modifications, variations and adaptations of the present utility model using its general principles and the following detailed description and the accompanying drawings, or the direct/indirect application of the present utility model to other relevant arts and technologies.
Claims (10)
1. A switch multiplexing control circuit, comprising:
a battery activation signal terminal;
the level signal end pulls up the high level signal;
the trigger switch is electrically connected with the battery activation signal end and the level signal end and is grounded;
when the trigger switch triggers, the trigger switch enables the battery activation signal end to be grounded and switches the level state of the level signal end; when the trigger switch is not triggered, the current loop of the battery activation signal end to the level signal end is in an off state.
2. The switch multiplexing control circuit of claim 1, further comprising a unidirectional conduction unit, wherein the level signal terminal is electrically connected to the trigger switch via the unidirectional conduction unit, and wherein the unidirectional conduction unit is unidirectional in a direction from the level signal terminal to the trigger switch.
3. The switch-multiplexing control circuit of claim 2, wherein the trigger switch comprises a ground terminal and a signal terminal, the ground terminal is grounded, the battery-activated signal terminal is electrically connected to the signal terminal, and the level signal terminal is electrically connected to the signal terminal via the unidirectional-on unit.
4. The switch multiplexing control circuit of claim 1, wherein said trigger switch comprises at least one ground pin and two independent signal pins, said ground pins being grounded, one of said signal pins being electrically connected to said battery activation signal terminal, the other of said signal pins being electrically connected to said level signal terminal, two of said signal pins being unconnected; when the trigger switch is triggered, the two signal pins are communicated with the grounding pin; and when the trigger switch is not triggered, the two signal pins are disconnected with the grounding pin.
5. The switch-multiplexing control circuit according to any one of claims 1 to 4, further comprising a switching unit through which the level signal terminal is connected to the trigger switch; the switching unit comprises an on-off control end, a first connecting end and a second connecting end, wherein the on-off control end of the switching unit is electrically connected with the trigger switch, the first connecting end of the switching unit is electrically connected with the level signal end, and the second connecting end of the switching unit is grounded; and the switching unit switches the on-off state according to the level of the on-off control end.
6. The multiplexing control circuit of claim 5, wherein the switching unit comprises a switching tube and a first resistor, the trigger end, the first conducting end and the second conducting end of the switching tube are sequentially corresponding to be the on-off control end, the first connecting end and the second connecting end of the switching unit, and the trigger end of the switching tube is electrically connected with a power supply through the first resistor.
7. The multiplexing control circuit of claim 6, wherein the switching tube is an NPN-type transistor, the trigger end, the first conducting end, and the second conducting end of the switching tube are sequentially a base, a collector, and an emitter of the NPN-type transistor, the base of the NPN-type transistor is connected in series with a resistor, and the collector of the NPN-type transistor is grounded through a resistor.
8. The switch multiplexing control circuit of claim 1, further comprising a second resistor and a third resistor, the second resistor being connected in series between the level signal terminal and the trigger switch, the third resistor being connected in series between the battery activation signal terminal and the trigger switch.
9. The switch-multiplexing control circuit of claim 1, further comprising a voltage regulator tube through which the battery activation signal terminal is grounded.
10. An electronic device comprising battery means and functional means, further comprising the switch multiplexing control circuit of any one of claims 1 to 9, the battery activation signal terminal being electrically connected to the battery means, the level signal terminal being electrically connected to the functional means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321046624.8U CN219718206U (en) | 2023-05-04 | 2023-05-04 | Switch multiplexing control circuit and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321046624.8U CN219718206U (en) | 2023-05-04 | 2023-05-04 | Switch multiplexing control circuit and electronic equipment |
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| CN219718206U true CN219718206U (en) | 2023-09-19 |
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| CN202321046624.8U Active CN219718206U (en) | 2023-05-04 | 2023-05-04 | Switch multiplexing control circuit and electronic equipment |
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