On-off circuit for wireless microphone equipment and electronic equipment

Abstract

A power-on and power-off circuit for a wireless microphone device and an electronic device belong to the technical field of wireless microphones, a charging management circuit outputs a system voltage, and when a power-on carrier signal is accessed, output of the system voltage is stopped for a first preset duration based on a power-on control signal; the power-on carrier signal comprises the voltage of the power supply direct current and a power-on control signal; the first switching circuit transmits a system voltage based on the voltage of the power supply direct current; the control circuit is powered on and started again according to disconnection of the system voltage for a first preset duration, and outputs an enable signal; the second switching circuit transmits the voltage of the power supply direct current to the control circuit based on the enable signal; the control circuit enters a working state based on the voltage of the power supply direct current; according to the method, hardware design is simplified, starting can be carried out after the starting carrier signal is received, the possibility that file data backup occupies time before restarting is reduced, and the uncovering and starting response speed is high.

Description

Technical Field

[0001] The present application belongs to the technical field of wireless microphones, and in particular, relates to a power on / off circuit and electronic equipment for wireless microphone equipment. Background Art

[0002] Wireless microphone systems are often used in film and television dramas, variety shows, interviews and VLOG creation. Wireless microphone systems include transmitters, receivers and charging boxes. Specifically, the transmitter is responsible for capturing and modulating sound signals, and then transmitting these signals to the receiver wirelessly, and then the receiver outputs the signals to the post-production shooting equipment.

[0003] When a user uses a wireless microphone, he hopes that the wireless microphone can automatically turn on when the charging case is opened. However, the common wireless microphone charging cases on the market currently require three or more contacts to transmit control and exchange information, of which two contacts are used for charging and the extra contacts are used to transmit control signals. This results in complex hardware design and the microprocessor needs to back up file data and then restart when the charging case is opened. The wireless microphone responds to power on slowly.

[0004] Therefore, there is an urgent need for a power on / off circuit for a wireless microphone device that has a simple hardware design and a fast cover-opening power on response speed. Summary of the invention

[0005] The purpose of this application is to provide a power on / off circuit and electronic device for a wireless microphone device, aiming to solve the problem that the hardware design of the power on / off circuit for the existing wireless microphone device is complex and the wireless microphone responds slowly to power on when the charging compartment cover is opened.

[0006] The embodiment of the present application provides a power on / off circuit for a wireless microphone device, including:

[0007] A charging management circuit, configured to output a system voltage, and when a power-on carrier signal is connected, stop outputting the system voltage for a first preset time based on a power-on control signal; the power-on carrier signal includes a voltage of a power supply DC power and the power-on control signal;

[0008] a first switch circuit, connected to the charging management circuit, and configured to transmit the system voltage based on the voltage of the supply DC power;

[0009] a control circuit connected to the first switch circuit, configured to restart the system according to the recovery of the system voltage and output an enable signal;

[0010] a second switch circuit, connected to the charging management circuit, the first switch circuit and the control circuit, and configured to transmit the voltage of the power supply DC to the control circuit based on the enable signal;

[0011] The control circuit is further configured to enter a working state based on the voltage of the supply DC power.

[0012] In one of the embodiments, the charging management circuit is further configured to output connection status information according to the voltage of the DC power supply or the system voltage;

[0013] The control circuit is also connected to the charging management circuit, and is specifically used to restart the system according to the disconnection of the system voltage, and output the enable signal according to the connection status information.

[0014] In one of the embodiments, the control circuit is further configured to output a self-locking signal based on the connection status information;

[0015] The first switch circuit is specifically configured to transmit the system voltage to the control circuit based on the voltage of the power supply DC power and / or the self-locking signal.

[0016] In one embodiment, the charging management circuit is further configured to output a shutdown signal based on a shutdown control signal when a shutdown carrier signal is connected; the shutdown carrier signal includes the shutdown control signal and the voltage of the power supply DC power;

[0017] The control circuit is further configured to stop outputting the enable signal in response to the shutdown signal;

[0018] The second switch circuit is further used for disconnecting the output of the voltage of the power supply DC power in response to the stopping of the enable signal;

[0019] The control circuit is also used to enter a soft shutdown state according to the disconnection of the voltage of the power supply DC power.

[0020] In one embodiment, the charging management circuit is further configured to output a charging voltage based on the voltage of the power supply DC power; and further comprises:

[0021] an energy storage circuit, connected to the charging management circuit, for charging based on the charging voltage and outputting a battery voltage;

[0022] The charging management circuit is specifically configured to output the system voltage according to the battery voltage.

[0023] In one embodiment, the power on / off circuit for the wireless microphone device further includes:

[0024] A key circuit, connected to the first switch circuit, and configured to output a key signal based on an operation;

[0025] a third switch circuit, connected to the key circuit, the first switch circuit and the control circuit, and configured to output a first level signal based on the key signal;

[0026] The first switch circuit is further used to transmit the system voltage to the control circuit based on the key signal;

[0027] The control circuit is further configured to switch between a working state and a shutdown state according to the first level signal under the stimulation of the system voltage.

[0028] In one of the embodiments, the charging management circuit includes a power management chip and a first voltage regulator diode;

[0029] The power input terminal of the power management chip and the cathode of the first voltage-stabilizing diode serve together as the startup carrier signal input terminal and the shutdown carrier signal input terminal of the charging management circuit to input the startup carrier signal and the shutdown carrier signal; the main control power terminal of the power management chip serves as the system voltage output terminal of the charging management circuit, and is connected to the first switching circuit to output the system voltage; the anode of the first voltage-stabilizing diode is connected to the power ground; the power voltage input terminal of the power management chip serves as the charging voltage output terminal and the battery voltage input terminal of the charging management circuit, and is connected to the energy storage circuit to output the charging voltage and input the battery voltage; the IIC clock terminal of the power management chip and the IIC data terminal of the power management chip serve together as the connection status information output terminal of the charging management circuit, and are connected to the control circuit to output the connection status information; the open-drain output terminal of the power management chip serves as the shutdown signal output terminal of the charging management circuit, and is connected to the control circuit to output the shutdown signal.

[0030] In one embodiment, the first switch circuit includes a first load switch, a first diode, a second diode, a third diode, a first resistor and a second resistor;

[0031] The voltage input terminal of the first load switch serves as the system voltage input terminal of the first switch circuit, and is connected to the charging management circuit to input the system voltage; the output terminal of the first load switch serves as the voltage output terminal of the power supply DC of the first switch circuit, and is connected to the control circuit to output the system voltage; the enable terminal of the first load switch, the cathode of the first diode, the cathode of the second diode, and the cathode of the third diode are connected, the anode of the first diode is connected to the first end of the first resistor, and the second end of the first resistor serves as the self-locking signal input terminal of the first switch circuit, and is connected to the control circuit to input the self-locking signal; the anode of the second diode is connected to the first end of the second resistor, and the second end of the second resistor serves as the voltage input terminal of the power supply DC of the first switch circuit, and is input the voltage of the power supply DC; the anode of the third diode serves as the key signal input terminal of the first switch circuit, and is connected to the key circuit to input the key signal; the ground terminal of the first load switch is connected to the power ground.

[0032] In one embodiment, the control circuit includes a Bluetooth chip, a first inductor and a first capacitor;

[0033] The first end of the first inductor is used as the system voltage input end of the control circuit, and is connected to the first switch circuit to input the system voltage; the second end of the first inductor, the first end of the first capacitor and the power supply voltage input end of the Bluetooth chip are connected; the first universal input-output end of the Bluetooth chip is used as the enable signal output end of the control circuit, and is connected to the second switch circuit to output the enable signal; the DC voltage input end of the Bluetooth chip is used as the voltage input end of the power supply DC power of the control circuit, and is connected to the second switch circuit to input the voltage of the power supply DC power; the second universal input-output end of the Bluetooth chip is used as the voltage input end of the control circuit The shutdown signal input terminal of the Bluetooth chip is connected to the charging management circuit to input a shutdown signal; the third general input and output terminal of the Bluetooth chip and the fourth general input and output terminal of the Bluetooth chip are jointly used as the connection status information input terminal of the control circuit, connected to the charging management circuit to input connection status information; the switch reset signal terminal of the Bluetooth chip is used as the first level signal input terminal of the control circuit, connected to the third switch circuit to input a first level signal; the fifth general input and output terminal of the Bluetooth chip is used as the self-locking signal output terminal of the control circuit, connected to the first switch circuit to output a self-locking signal; the second end of the first capacitor is connected to the power ground.

[0034] An embodiment of the present application further provides a transmitter, which includes the above-mentioned power on / off circuit for a wireless microphone device.

[0035] An embodiment of the present application further provides a receiver, which includes the above-mentioned power on / off circuit for a wireless microphone device.

[0036] The embodiment of the present application also provides a microphone system, including a charging box, the above-mentioned transmitter and the above-mentioned receiver;

[0037] The charging box is connected to the transmitter and the receiver, and is used to output multiple shutdown carrier signals when the cover is detected to be closed, and is used to output multiple startup carrier signals when the cover is detected to be opened.

[0038] In one embodiment, the charging box includes:

[0039] A Hall sensor circuit, used to output a first sensor signal when a cover closing is detected, and to output a second sensor signal when a cover opening is detected;

[0040] A main control circuit, connected to the Hall sensor circuit, configured to output a shutdown state signal according to the first sensor signal, and output a startup state signal according to the second sensor signal;

[0041] The power management circuit is connected to the main control circuit, the transmitter and the receiver, and is used to receive the input direct current, and output a plurality of the power-on carrier signals according to the input direct current and the power-on status signal, and output a plurality of the power-off carrier signals according to the input direct current and the power-off status signal.

[0042] In one of the embodiments, the power management circuit is further configured to disconnect the output of the power supply DC power in response to the current of the power supply DC power being less than or equal to a preset current.

[0043] Compared with the prior art, the embodiments of the present application have the following beneficial effects: the charging management circuit in the present application is powered on based on a power-on carrier signal, wherein the power-on carrier signal includes the voltage of the DC power supply and a power-on control signal, thereby reducing the transmission line dedicated to the power-on control signal, thereby reducing the configuration of the contacts, simplifying the hardware design, and the power can be turned on upon receiving the power-on carrier signal, and the charging management circuit stops outputting the preset voltage for the first preset time and then outputs the system voltage to the first switching circuit again, so that the control circuit can be completely powered off, so that when the cover is opened and the power is turned on, it is from the off state to the on state, rather than from the soft off state to the on state, thereby omitting the reaction time for backing up file data before restarting, reducing the possibility of the file data backup taking up time before restarting, and the response speed for opening the cover and turning on is fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical application in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 A schematic diagram of a structure of a power on / off circuit for a wireless microphone device provided in one embodiment of the present application;

[0046] Figure 2 Another structural schematic diagram of a power on / off circuit for a wireless microphone device provided in one embodiment of the present application;

[0047] Figure 3 Another structural schematic diagram of a power on / off circuit for a wireless microphone device provided in one embodiment of the present application;

[0048] Figure 4 Another structural schematic diagram of a power on / off circuit for a wireless microphone device provided in one embodiment of the present application;

[0049] Figure 5 Another structural schematic diagram of a power on / off circuit for a wireless microphone device provided in one embodiment of the present application;

[0050] Figure 6 Another structural schematic diagram of a power on / off circuit for a wireless microphone device provided in one embodiment of the present application;

[0051] Figure 7 Another structural schematic diagram of a power on / off circuit for a wireless microphone device provided in one embodiment of the present application;

[0052] Figure 8 Another structural schematic diagram of a power on / off circuit for a wireless microphone device provided in one embodiment of the present application;

[0053] Fig. 9 A partial exemplary circuit schematic diagram of a power on / off circuit for a wireless microphone device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0054] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0055] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0056] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0058] Figure 1 A schematic diagram of the structure of a power on / off circuit for a wireless microphone device provided in an embodiment of the present application is shown. For ease of description, only the part related to the present embodiment is shown, which is described in detail as follows:

[0059] The power on / off circuit for the wireless microphone device comprises a charging management circuit 10 , a first switch circuit 20 , a control circuit 30 and a second switch circuit 40 .

[0060] The charging management circuit 10 is used to output the system voltage according to the voltage of the connected power supply DC power, and when the power-on carrier signal is connected, stop outputting the system voltage for the first preset time period based on the power-on control signal; the power-on carrier signal includes the voltage of the power supply DC power and the power-on control signal.

[0061] The first switch circuit 20 is connected to the charging management circuit 10 and is used for transmitting a system voltage based on the voltage of the supply DC power.

[0062] The control circuit 30 is connected to the first switch circuit 20, and is used to restart the system according to the recovery of the system voltage and output an enable signal.

[0063] The second switch circuit 40 is connected to the charging management circuit 10 , the first switch circuit 20 and the control circuit 30 , and is used to transmit the voltage of the power supply DC to the control circuit 30 based on the enable signal.

[0064] The control circuit 30 is further configured to enter a working state based on the voltage of the supply DC power or the system voltage.

[0065] It can be understood that the first preset time length can be set according to actual needs. For example, the first preset time length can be 100ms to 300ms.

[0066] In a specific implementation, the power-on carrier signal can be connected through the two-pin spring contact.

[0067] The power-on carrier signal includes the voltage of the power supply DC power and the power-on control signal. When the power-on carrier signal is connected, the charging management circuit 10 stops outputting the system voltage based on the power-on control signal, and outputs the system voltage to the first switch circuit 20 again after the first preset time (it should be noted that the charging management circuit 10 stops outputting the preset voltage and outputs the system voltage to the first switch circuit 20 again after the first preset time, so that the control circuit 30 can be completely powered off, so that when the cover is opened and the power is turned on, it is from the off state to the on state, rather than from the soft off state to the on state, and the reaction time of the microprocessor backing up the file data is omitted). The first switch circuit 20 transmits the system voltage to the control circuit 30 based on the voltage of the power supply DC power. The control circuit 30 is powered on again after the system voltage is restored, and outputs an enable signal to the second switch circuit 40, so that the second switch circuit 40 transmits the voltage of the power supply DC power to the control circuit 30, so that the control circuit 30 directly enters the working state according to the voltage of the power supply DC power to complete the power-on action.

[0068] Among them, since the charging management circuit 10 is powered on based on a power-on carrier signal, wherein the power-on carrier signal includes the voltage of the power supply DC power and the power-on control signal, only two contacts are actually required to simultaneously realize the transmission of the voltage of the power supply DC power and the power-on control signal. Compared with the existing power-on and power-off circuits for wireless microphone devices, there is no need to use three contacts or more contacts to avoid configuring contacts dedicated to the power-on control signal, thereby reducing the use of contacts and simplifying the hardware design. Moreover, the power-on can be realized upon receiving the power-on carrier signal, and the charging management circuit 10 stops outputting the preset voltage for the first preset time and then outputs the system voltage to the first switch circuit 20 again, so that the control circuit 30 can be completely powered off, so that when the cover is opened and the power is turned on, it is from the off state to the on state, rather than from the soft off state to the on state, thereby omitting the reaction time of backing up the file data before restarting, reducing the possibility of the file data backup occupying time before restarting, and the response speed of opening the cover and starting up is fast.

[0069] After receiving the power-on control signal, the control circuit 30 is directly powered by the voltage of the DC power supply, without the need for a built-in energy storage circuit ( Figure 1 The energy storage circuit is not shown in the figure and is powered by a power supply, which can ensure that the energy storage circuit is not in a state of charging and discharging at the same time, thereby extending the service life of the energy storage circuit.

[0070] By way of example and not limitation, Figure 2 As shown, the charging management circuit 10 is further configured to output connection status information according to the voltage of the supplied DC power.

[0071] The control circuit 30 is also connected to the charging management circuit 10, and is specifically used to restart the system according to the recovery of the system voltage, and output an enable signal according to the connection status information.

[0072] In a specific implementation, the connection status information may be transmitted via serial communication. More specifically, the connection status information may be an integrated circuit bus (IIC) signal.

[0073] The charging management circuit 10 outputs connection status information to the control circuit 30 according to the voltage of the DC power supply, and the control circuit 30 outputs an enable signal according to the connection status information, thereby ensuring that the power on / off circuit for the wireless microphone device is connected to the charging box 333 at this time. The charging management circuit 10 and the control circuit 30 can be powered by the charging box 333, thereby improving the reliability of the circuit.

[0074] By way of example and not limitation, Figure 3 As shown, the control circuit 30 is further configured to output a self-locking signal based on the connection status information.

[0075] The first switch circuit 20 is specifically configured to transmit a system voltage to the control circuit 30 based on the voltage of the power supply DC power and / or the self-locking signal.

[0076] It can be understood that when the power-on carrier signal is just connected, the first switch circuit 20 transmits the system voltage to the control circuit 30 based on the voltage of the power supply DC; after the control circuit 30 is powered on again, it immediately determines whether it is connected to the charging box at this time by detecting the connection status information. If it is connected, the control circuit 30 outputs a self-locking signal to the first switch circuit 20. At this time, the first switch circuit 20 transmits the system voltage to the control circuit 30 based on the voltage of the power supply DC and the self-locking signal; when it is taken out of the charging box, the voltage of the power supply DC is disconnected, and the first switch circuit 20 still transmits the system voltage to the control circuit 30 based on the self-locking signal. Since the self-locking signal always exists from the time when it is connected to the charging box to the time when it is taken out of the charging box, it ensures that the control circuit 30 can still maintain normal operation after it is taken out of the charging box, so that the power on and off circuit for the wireless microphone device can be applied to portable electronic devices, which improves the convenience of use and the reliability of the circuit, and there is no need to turn on the first switch circuit 20 for power supply again during the removal process, which further improves the convenience of use and meets the user's needs for ready-to-use.

[0077] By way of example and not limitation, Figure 4As shown, the charging management circuit 10 is also used to output a shutdown signal based on the shutdown control signal when a shutdown carrier signal is connected; the shutdown carrier signal includes the shutdown control signal and the voltage of the power supply DC power.

[0078] The control circuit 30 is further configured to stop outputting the enable signal in response to the shutdown signal.

[0079] The second switch circuit 40 is further configured to disconnect the output of the voltage of the supply DC power in response to the cessation of the enable signal.

[0080] The control circuit 30 is further configured to enter a soft shutdown state according to the disconnection of the voltage of the DC power supply.

[0081] It can be understood that the shutdown control signal and the startup control signal can both be pulse signals, and the shutdown control signal and the startup control signal can have different duty cycles and / or numbers of pulses.

[0082] When the shutdown carrier signal is connected, the charging management circuit 10 outputs a shutdown signal to the control circuit 30 based on the shutdown control signal. The control circuit 30 responds to the shutdown signal and stops outputting the enable signal. The second switching circuit 40 disconnects the output of the DC power supply voltage. At this time, the control circuit 30 is not supplied with the DC power supply voltage, thereby entering a soft shutdown state, reducing power consumption and realizing the shutdown function.

[0083] By way of example and not limitation, Figure 5 As shown, the charging management circuit 10 is also used to output a charging voltage based on the voltage of the supply DC power; the power on / off circuit for the wireless microphone device also includes an energy storage circuit 50.

[0084] The energy storage circuit 50 is connected to the charging management circuit 10, and is used for charging based on the charging voltage and outputting the battery voltage.

[0085] The charging management circuit 10 is specifically configured to output a system voltage according to the battery voltage.

[0086] In a specific implementation, the energy storage circuit 50 may include a battery.

[0087] By setting up an energy storage circuit to store electrical energy, the power on / off circuit for the wireless microphone device can be applied to portable electronic devices. The portable electronic device can still maintain normal operation after being taken out of the charging box, thereby improving convenience of use.

[0088] By way of example and not limitation, Figure 6 As shown, the power on / off circuit for the wireless microphone device further includes a key circuit 60 and a third switch circuit 70 .

[0089] The key circuit 60 is connected to the first switch circuit 20 and is used to output a key signal based on an operation.

[0090] The third switch circuit 70 is connected to the key circuit 60 , the first switch circuit 20 and the control circuit 30 , and is configured to output a first level signal based on the key signal.

[0091] The first switch circuit 20 is further configured to transmit the system voltage to the control circuit 30 based on the key signal.

[0092] The control circuit 30 is also used to switch between the working state and the shutdown state according to the first level signal under the stimulation of the system voltage.

[0093] The first level signal may be a high level or a low level.

[0094] In a specific implementation, the key circuit 60 includes a key S1, and the operation can be set to press the key S1 for a second preset time, the third switch circuit 70 outputs a first level signal of a second preset time based on the key signal of the second preset time, and the first switch circuit 20 transmits a system voltage based on the first level signal of the second preset time, thereby reducing the possibility of false touch and improving the reliability of the switch circuit. It can be understood that the second preset time can be set according to actual needs, for example, the second preset time can be 3S.

[0095] In a specific implementation, the button circuit 60 can only work when the electronic device using the power on / off circuit for the wireless microphone device is outside the charging compartment.

[0096] It is understandable that the key circuit 60 can be powered by the energy storage circuit 50 .

[0097] In the working state, the key circuit 60 outputs a key signal to the third switch circuit 70 based on the operation, the third switch circuit 70 outputs a first level signal to the first switch circuit 20 based on the key signal, the first switch circuit 20 transmits a system voltage to the control circuit 30 based on the key signal, and the control circuit 30 stops working. In the shutdown state, the key circuit 60 outputs a key signal to the third switch circuit 70 based on the operation, the third switch circuit 70 outputs a first level signal to the first switch circuit 20 based on the key signal, the first switch circuit 20 transmits a system voltage to the control circuit 30 based on the key signal, and the control circuit 30 is powered on and works.

[0098] The key circuit 60 improves the convenience of using the power on / off circuit for the wireless microphone device and enriches the functions of the power on / off circuit for the wireless microphone device.

[0099] An embodiment of the present application also provides a transmitter, which includes the above-mentioned power on / off circuit for a wireless microphone device.

[0100] An embodiment of the present application also provides a receiver, which includes the above-mentioned power on / off circuit for a wireless microphone device.

[0101] By way of example and not limitation, Figure 7 As shown, an embodiment of the present application also provides a microphone system, including a charging box 333, the above-mentioned transmitter 111 and the above-mentioned receiver 222.

[0102] The charging box 333 is connected to the transmitter 111 and the receiver 222, and is used to output multiple shutdown carrier signals when the cover is detected to be closed, and is used to output multiple startup carrier signals when the cover is detected to be opened.

[0103] In a specific implementation, the microphone system may include multiple transmitters 111 .

[0104] By way of example and not limitation, Figure 8 As shown, the charging box 333 includes a Hall sensor circuit 80, a main control circuit 90 and a power management circuit 100.

[0105] The Hall sensor circuit 80 is used to output a first sensor signal when a cover closing is detected, and is used to output a second sensor signal when a cover opening is detected.

[0106] The main control circuit 90 is connected to the Hall sensor circuit 80, and is used to output a shutdown state signal according to the first sensor signal, and output a startup state signal according to the second sensor signal.

[0107] The power management circuit 100 is connected to the main control circuit 90, the transmitter 111 and the receiver 222, and is used to receive the input DC power, and output multiple power-on carrier signals according to the input DC power and the power-on status signal, and output multiple power-off carrier signals according to the input DC power and the power-off status signal.

[0108] It can be understood that, in a specific implementation, the Hall switch U5 can sense the S pole of the magnet on the cover of the charging box, or it can sense the N pole of the magnet, and the level of the first sensor signal is opposite to the level of the second sensor signal.

[0109] For example, the Hall sensor circuit 80 can output a low level when the S pole of the magnet on the cover of the charging box 333 is close, and output a high level when the S pole is far away, that is, at this time the first sensor signal can be a low level and the second sensor signal can be a high level.

[0110] The power management circuit 100 is further configured to disconnect the output of the power supply DC power in response to the current of the power supply DC power being less than or equal to a preset current.

[0111] The charging management circuit 10 is further configured to stop outputting the charging voltage based on the disconnection of the supply DC power, so as to stop charging the energy storage circuit 50 .

[0112] In a specific implementation, when the cover is closed and the energy storage circuit 50 is not fully charged, the current of the DC power supply is greater than the preset current. At this time, the charging management circuit 10 outputs a charging voltage based on the DC power supply, and the energy storage circuit 50 is charged based on the charging voltage. When the energy storage circuit 50 is fully charged, the current of the DC power supply is reduced to less than or equal to the preset current. At this time, the power management circuit 100 disconnects the output of the DC power supply, and the charging management circuit 10 stops outputting the charging voltage based on the disconnection of the DC power supply to stop charging the energy storage circuit 50, thereby reducing the possibility of overcharging the energy storage circuit 50 and improving the safety and reliability of the wireless microphone device.

[0113] Fig. 9 A partial exemplary circuit structure of a power on / off circuit for a wireless microphone device provided in an embodiment of the present application is shown. Fig. 9 A partial exemplary circuit structure of the charging box 333 provided in an embodiment of the present application is also shown. For the sake of convenience, only the part related to the embodiment of the present application is shown, which is described in detail as follows:

[0114] The charging management circuit 10 includes a power management chip U1 and a first voltage regulator diode Z1.

[0115] The power input terminal VIN of the power management chip U1 and the cathode of the first voltage zener diode Z1 are used together as the startup carrier signal input terminal and the shutdown carrier signal input terminal of the charging management circuit 10 to input the startup carrier signal and the shutdown carrier signal; the main control power terminal VSYS of the power management chip U1 is used as the system voltage output terminal of the charging management circuit 10, connected to the first switch circuit 20 to output the system voltage; the anode of the first voltage zener diode Z1 is connected to the power ground; the power voltage input terminal BAT of the power management chip U1 is used as the charging diode The charging voltage output terminal of the charging management circuit 10 and the battery voltage input terminal of the charging management circuit 10 are connected to the energy storage circuit 50 to output the charging voltage and input the battery voltage; the IIC clock terminal SCL of the power management chip U1 and the IIC data terminal SDA of the power management chip U1 are used as the connection status information output terminal of the charging management circuit 10, and are connected to the control circuit 30 to output the connection status information; the open-drain output terminal PWK of the power management chip U1 is used as the shutdown signal output terminal of the charging management circuit 10, and is connected to the control circuit 30 to output the shutdown signal.

[0116] The circuit has high integration, and is simple and reliable.

[0117] The first switch circuit 20 includes a first load switch U2 , a first diode D1 , a second diode D2 , a third diode D3 , a first resistor R1 , and a second resistor R2 .

[0118] The voltage input terminal VIN of the first load switch U2 is used as the system voltage input terminal of the first switch circuit 20, and is connected to the charging management circuit 10 to input the system voltage; the output terminal VOUT of the first load switch U2 is used as the voltage output terminal of the power supply DC of the first switch circuit 20, and is connected to the control circuit 30 to output the system voltage; the enable terminal EN of the first load switch U2, the cathode of the first diode D1, the cathode of the second diode D2 and the cathode of the third diode D3 are connected, the anode of the first diode D1 is connected to the first end of the first resistor R1, and the second end of the first resistor R1 is used as the self-locking signal input terminal of the first switch circuit 20, and is connected to the control circuit 30 to input the self-locking signal; the anode of the second diode D2 is connected to the first end of the second resistor R2, and the second end of the second resistor R2 is used as the voltage input terminal of the power supply DC of the first switch circuit 20 to input the voltage of the power supply DC; the anode of the third diode D3 is used as the key signal input terminal of the first switch circuit 20, and is connected to the key circuit 60 to input the key signal; the ground terminal GND of the first load switch U2 is connected to the power ground.

[0119] The circuit reduces the possibility of current backflow to the control circuit 30 through the first diode D1, reduces the possibility of current backflow to the charging management circuit 10, the second load switch and the charging box 333 through the second diode D2, and reduces the possibility of current backflow to the third switch circuit 70 through the third diode D3, thereby improving the reliability of the switching circuit.

[0120] The control circuit 30 includes a Bluetooth chip U3 , a first inductor L1 , and a first capacitor C1 .

[0121] The first end of the first inductor L1 is used as the system voltage input end of the control circuit 30, and is connected to the first switch circuit 20 to input the system voltage; the second end of the first inductor L1 and the first end of the first capacitor C1 are connected to the BAT of the control circuit 30; the first general input and output end GPIO22 of the Bluetooth chip U3 is used as the enable signal output end of the control circuit 30, and is connected to the second switch circuit 40 to output the enable signal; the DC voltage input end DC5V of the Bluetooth chip U3 is used as the voltage input end of the DC power supply of the control circuit 30, and is connected to the second switch circuit 40 to input the voltage of the DC power supply; the second general input and output end GPIO11 of the Bluetooth chip U3 is used as the shutdown signal input end of the control circuit 30, It is connected to the charging management circuit 10 to input a shutdown signal; the third general input and output terminal GPIO33 of the Bluetooth chip U3 and the fourth general input and output terminal GPIO32 of the Bluetooth chip U3 are used together as the connection status information input terminal of the control circuit 30, and are connected to the charging management circuit 10 to input the connection status information; the switch reset signal terminal ONOFF of the Bluetooth chip U3 is used as the first level signal input terminal of the control circuit 30, and is connected to the third switch circuit 70 to input the first level signal; the fifth general input and output terminal GPIO10 of the Bluetooth chip U3 is used as the self-locking signal output terminal of the control circuit 30, and is connected to the first switch circuit 20 to output a self-locking signal; the second end of the first capacitor C1 is connected to the power ground.

[0122] The circuit is simple and reliable.

[0123] The second switch circuit 40 includes a second load switch U4 .

[0124] The enable terminal EN of the second load switch U4 serves as the enable signal input terminal of the second switch circuit 40, and is connected to the control circuit 30 to input the enable signal; the voltage input terminal VIN of the second load switch U4 serves as the voltage input terminal of the power supply DC power of the second switch circuit 40, and is used to input the voltage of the power supply DC power; the voltage output terminal VOUT of the second load switch U4 serves as the voltage output terminal of the power supply DC power of the second switch circuit 40, and is connected to the control circuit 30 to output the voltage of the power supply DC power; the ground terminal GND of the second load switch U4 is connected to the power ground.

[0125] The key circuit 60 includes a key S1 , a second voltage stabilizing diode Z2 and a third resistor R3 .

[0126] The first end of the key S1 and the cathode of the second voltage-stabilizing diode Z2 are connected to the energy storage circuit 50, the second end of the key S1 is connected to the first end of the third resistor R3, the second end of the third resistor R3 serves as the key signal output end of the key circuit 60, and is connected to the first switch circuit 20 and the third switch circuit 70 to output the key signal; the anode of the second voltage-stabilizing diode Z2 is connected to the power ground.

[0127] The third switch circuit 70 includes a fourth diode D4, a field effect transistor Q1, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a seventh resistor R7.

[0128] The anode of the fourth diode D4 is used as the key signal input terminal of the third switch circuit 70, and is connected to the key circuit 60 and the first switch circuit 20 to input the key signal; the cathode of the fourth diode D4, the gate of the field effect transistor Q1 and the first end of the fourth resistor R4 are connected, the drain of the field effect transistor Q1 is connected to the first end of the fifth resistor R5, the first end of the sixth resistor R6 and the first end of the seventh resistor R7, the second end of the sixth resistor R6 is connected to the first power supply, and the second end of the seventh resistor R7 is used as the first level signal output terminal of the third switch circuit 70, and is connected to the control circuit 30 to output the first level signal; the second end of the fourth resistor R4, the source of the field effect transistor Q1 and the second end of the fifth resistor R5 are connected to the power ground.

[0129] The Hall sensor circuit 80 includes a Hall switch U5, a transient voltage suppressor diode Z3, an eighth resistor R8, a second capacitor C2, and a third capacitor C3.

[0130] The power supply terminal VCC of the Hall switch U5 is connected to the first end of the eighth resistor R8 and the first end of the second capacitor C2, the second end of the eighth resistor R8 is connected to the second power supply, the output terminal OUT of the Hall switch U5, the first end of the third capacitor C3 and the first end of the transient voltage suppression diode Z3 are commonly used as the first sensing signal output terminal of the Hall sensing circuit 80 and the second sensing signal output terminal of the Hall sensing circuit 80, and are connected to the main control circuit 90 to output the first sensing signal or the second sensing signal, and the ground terminal GND of the Hall switch U5, the second end of the second capacitor C2, the second end of the third capacitor C3 and the second end of the transient voltage suppression diode Z3 are connected to the power ground.

[0131] The main control circuit 90 includes a microprocessor U6.

[0132] The wake-up instruction receiving terminal BOOT1-PB2 of the microprocessor U6 serves as the first sensor signal input terminal of the main control circuit 90, and is connected to the Hall sensor circuit 80 to input the first sensor signal; the first general input and output terminal PA9 of the microprocessor U6 and the second general input and output terminal PA10 of the microprocessor U6 serve together as the shutdown status signal output terminal of the main control circuit 90 and the power-on status signal output terminal of the main control circuit 90, and are connected to the power management circuit 100 to output a shutdown status signal or a power-on status signal.

[0133] The power management circuit 100 includes a charging chip U7.

[0134] The IIC clock terminal SCL of the charging chip U7 and the IIC data terminal SDA of the charging chip U7 are used together as the shutdown status signal input terminal and the power-on status signal input terminal of the power management circuit 100 to input the shutdown status signal or the power-on status signal; the VIN of the charging chip U7 is used as the input DC input terminal of the power management circuit 100 to access the input DC power; the left earphone power terminal VOL of the charging chip U7 is used as the first startup carrier signal output terminal and the first shutdown carrier signal output terminal of the power management circuit 100, and is connected to the transmitter 111 to output a startup carrier signal or a shutdown carrier signal; the right earphone power terminal VOR of the charging chip U7 is used as the second startup carrier signal output terminal and the second shutdown carrier signal output terminal of the power management circuit 100, and is connected to the receiver 222 to output the second startup carrier signal or the second shutdown carrier signal.

[0135] The following is a combination of working principles Fig. 9 As shown for further explanation:

[0136] When the lid of the charging box 333 is opened, the Hall switch U5 detects the lid opening and outputs a high-level second sensing signal from the output terminal OUT of the Hall switch U5 to the wake-up instruction receiving terminal BOOT1-PB2 of the microprocessor U6. The microprocessor U6 outputs a power-on status signal from the first general input and output terminal PA9 of the microprocessor U6 and the second general input and output terminal PA10 of the microprocessor U6 to the IIC clock terminal SCL of the charging chip U7 and the IIC data terminal SDA of the charging chip U7 according to the second sensing signal. The VIN of the charging chip U7 is connected to the input DC power. The charging chip U7 outputs a first power-on carrier signal from the left earphone power terminal VOL of the charging chip U7 to the transmitter 111 according to the input DC power and the power-on status signal, and outputs a second power-on carrier signal from the right earphone power terminal VOR of the charging chip U7 to the receiver 222. The transmitter 111 and the receiver 222 are respectively powered on according to the corresponding power-on carrier signals. The power-on principles of the transmitter 111 and the receiver 222 are as follows.

[0137] The power input terminal VIN of the power management chip U1, the cathode of the first voltage-stabilizing diode Z1, the voltage input terminal VIN of the second load switch U4, and the second end of the second resistor R2 are connected to the power-on carrier signal together. The first load switch U2 is turned on based on the voltage of the power supply DC power flowing through the second resistor R2 and the second diode D2. The power management chip U1 stops outputting the system voltage from the main control power terminal VSYS of the power management chip U1 to the voltage input terminal VIN of the first load switch U2 based on the power-on control signal. The first load switch U2 stops outputting the system voltage from VOUT of the first load switch U2 to the first end of the first inductor L1. The Bluetooth chip U3 is powered off. After the first preset time, the power management chip U1 outputs the system voltage again. The first load switch U2 transmits the system voltage again. The Bluetooth chip U3 is powered on again and starts up. The power management chip U1 is also powered on based on the power-on control signal. The control signal outputs the connection status information from the IIC clock terminal SCL of the power management chip U1 and the IIC data terminal SDA of the power management chip U1 to 11 and the third general input and output terminal GPIO33 of the Bluetooth chip U3. The Bluetooth chip U3 outputs a self-locking signal from the fifth general input and output terminal GPIO10 of the Bluetooth chip U3 to the first end of the first resistor R1 according to the connection status information. The first load switch U2 transmits the system voltage based on the voltage of the power supply DC power and the self-locking signal. The Bluetooth chip U3 also outputs an enable signal from the first general input and output terminal GPIO22 of the Bluetooth chip U3 to the enable terminal EN of the second load switch U4 according to the connection status information. The second load switch U4 is turned on, and the voltage output terminal VOUT of the second load switch U4 transmits the voltage of the power supply DC power to the DC voltage input terminal DC5V of the Bluetooth chip U3, and the Bluetooth chip U3 enters the working state.

[0138] When the lid of the charging box 333 is closed, the Hall switch U5 detects the lid closure and outputs a low-level first sensing signal from the output terminal OUT of the Hall switch U5 to the wake-up instruction receiving terminal BOOT1-PB2 of the microprocessor U6. The microprocessor U6 outputs a shutdown status signal from the first general input and output terminal PA9 of the microprocessor U6 and the second general input and output terminal PA10 of the microprocessor U6 to the IIC clock terminal SCL of the charging chip U7 and the IIC data terminal SDA of the charging chip U7 according to the first sensing signal. The VIN of the charging chip U7 is connected to the input DC power. The charging chip U7 outputs a first shutdown carrier signal from the left earphone power terminal VOL of the charging chip U7 to the transmitter 111 according to the input DC power and the shutdown status signal, and outputs a second shutdown carrier signal from the right earphone power terminal VOR of the charging chip U7 to the receiver 222. The transmitter 111 and the receiver 222 are shut down according to the corresponding shutdown carrier signals, and the shutdown principles of the transmitter 111 and the receiver 222 are as follows.

[0139] The power input terminal VIN of the power management chip U1, the cathode of the first voltage-stabilizing diode Z1, the voltage input terminal VIN of the second load switch U4, and the second end of the second resistor R2 are commonly connected to the shutdown carrier signal. Based on the shutdown control signal, the power management chip U1 outputs a shutdown signal from the open-drain output terminal PWK of the power management chip U1 to the second general input and output terminal GPIO11 of the Bluetooth chip U3. In response to the shutdown signal, the Bluetooth chip U3 stops outputting the enable signal, the second load switch U4 is turned off, and the output of the power supply DC voltage is disconnected. The Bluetooth chip U3 enters the soft shutdown state, and the transmitter 111 and the receiver 222 enter the soft shutdown state accordingly. Finally, the charging box also enters the soft shutdown state.

[0140] When it is necessary to turn on the power using button S1, press button S1, the second end of the third resistor R3 outputs a button signal to the anode of the third diode D3 and the anode of the fourth diode D4, the field effect transistor Q1 is turned on, and the second end of the seventh resistor R7 outputs a low-level first-level signal to the switch reset signal terminal ONOFF of the Bluetooth chip U3. The first load switch U2 transmits the system voltage to the first end of the first inductor L1 based on the button signal, and the Bluetooth chip U3 enters the power-on state according to the first-level signal under the excitation of the system voltage.

[0141] When it is necessary to shut down the computer using button S1, press button S1, the second end of the third resistor R3 outputs a button signal to the anode of the third diode D3 and the anode of the fourth diode D4, the field effect transistor Q1 is turned on, and the second end of the seventh resistor R7 outputs a low-level first-level signal to the switch reset signal terminal ONOFF of the Bluetooth chip U3. The first load switch U2 transmits the system voltage to the first end of the first inductor L1 based on the button signal, and the Bluetooth chip U3 enters the shutdown state according to the first-level signal under the excitation of the system voltage.

[0142] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0143] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A power on / off circuit for a wireless microphone device, characterized in that: include: A charging management circuit, configured to output a system voltage, and when a power-on carrier signal is connected, stop outputting the system voltage for a first preset time based on a power-on control signal; the power-on carrier signal includes a voltage of a power supply DC power and the power-on control signal; a first switch circuit, connected to the charging management circuit, and configured to transmit the system voltage based on the voltage of the supply DC power; A control circuit, connected to the first switch circuit, configured to restart the system according to the recovery of the system voltage and output an enable signal; a second switch circuit, connected to the charging management circuit, the first switch circuit and the control circuit, and configured to transmit the voltage of the power supply DC to the control circuit based on the enable signal; The control circuit is further configured to enter a working state based on the voltage of the power supply DC power or the system voltage.

2. The power on / off circuit for a wireless microphone device as claimed in claim 1, characterized in that: The charging management circuit is further configured to output connection status information according to the voltage of the supply DC power; The control circuit is also connected to the charging management circuit, and is specifically used to restart the system according to the recovery of the system voltage, and output the enable signal according to the connection status information.

3. The power on / off circuit for a wireless microphone device as claimed in claim 2, characterized in that: The control circuit is further configured to output a self-locking signal based on the connection status information; The first switch circuit is specifically configured to transmit the system voltage to the control circuit based on the voltage of the power supply DC power and / or the self-locking signal.

4. The power on / off circuit for a wireless microphone device as claimed in claim 1, characterized in that: The charging management circuit is further configured to output a shutdown signal based on a shutdown control signal when a shutdown carrier signal is connected; the shutdown carrier signal includes the shutdown control signal and the voltage of the power supply DC power; The control circuit is further configured to stop outputting the enable signal in response to the shutdown signal; The second switch circuit is further used for disconnecting the output of the voltage of the power supply DC power in response to the stopping of the enable signal; The control circuit is also used to enter a soft shutdown state according to the disconnection of the voltage of the power supply DC power.

5. The power on / off circuit for a wireless microphone device as claimed in claim 1, characterized in that: The charging management circuit is further configured to output a charging voltage based on the voltage of the power supply DC power; and further comprises: an energy storage circuit, connected to the charging management circuit, for charging based on the charging voltage and outputting a battery voltage; The charging management circuit is specifically configured to output the system voltage according to the battery voltage.

6. The power on / off circuit for a wireless microphone device as claimed in claim 5, characterized in that: Also includes: A key circuit, connected to the first switch circuit, and configured to output a key signal based on an operation; a third switch circuit, connected to the key circuit, the first switch circuit and the control circuit, and configured to output a first level signal based on the key signal; The first switch circuit is further used to transmit the system voltage to the control circuit based on the key signal; The control circuit is further used to switch between a working state and a shutdown state according to the first level signal under the stimulation of the system voltage.

7. The power on / off circuit for a wireless microphone device as claimed in claim 1, characterized in that: The charging management circuit includes a power management chip and a first voltage stabilizing diode; The power input terminal of the power management chip and the cathode of the first voltage stabilizing diode are used together as the power-on carrier signal input terminal and the power-off carrier signal input terminal of the charging management circuit to input the power-on carrier signal and the power-off carrier signal; the main control power terminal of the power management chip is used as the system voltage output terminal of the charging management circuit, connected to the first switch circuit to output the system voltage; the anode of the first voltage stabilizing diode is connected to the power ground; The power supply voltage input terminal of the power management chip serves as the charging voltage output terminal of the charging management circuit and the battery voltage input terminal of the charging management circuit, and is connected to the energy storage circuit to output the charging voltage and input the battery voltage; the IIC clock terminal of the power management chip and the IIC data terminal of the power management chip serve as the connection status information output terminal of the charging management circuit, and are connected to the control circuit to output the connection status information; The open-drain output terminal of the power management chip serves as a shutdown signal output terminal of the charging management circuit and is connected to the control circuit to output a shutdown signal.

8. The power on / off circuit for a wireless microphone device as claimed in claim 1, characterized in that: The first switch circuit includes a first load switch, a first diode, a second diode, a third diode, a first resistor and a second resistor; The voltage input terminal of the first load switch serves as the system voltage input terminal of the first switch circuit, and is connected to the charging management circuit to input the system voltage; the output terminal of the first load switch serves as the voltage output terminal of the power supply DC of the first switch circuit, and is connected to the control circuit to output the system voltage; the enable terminal of the first load switch, the cathode of the first diode, the cathode of the second diode, and the cathode of the third diode are connected, the anode of the first diode is connected to the first end of the first resistor, and the second end of the first resistor serves as the self-locking signal input terminal of the first switch circuit, and is connected to the control circuit to input the self-locking signal; the anode of the second diode is connected to the first end of the second resistor, and the second end of the second resistor serves as the voltage input terminal of the power supply DC of the first switch circuit, and is input the voltage of the power supply DC; the anode of the third diode serves as the key signal input terminal of the first switch circuit, and is connected to the key circuit to input the key signal; the ground terminal of the first load switch is connected to the power ground.

9. The power on / off circuit for a wireless microphone device as claimed in claim 1, characterized in that: The control circuit includes a Bluetooth chip, a first inductor and a first capacitor; The first end of the first inductor is used as the system voltage input end of the control circuit, and is connected to the first switch circuit to input the system voltage; the second end of the first inductor and the first end of the first capacitor are connected to the power voltage input end of the Bluetooth chip, and the first universal input-output end of the Bluetooth chip is used as the enable signal output end of the control circuit, and is connected to the second switch circuit to output the enable signal; the DC voltage input end of the Bluetooth chip is used as the voltage input end of the power supply DC power of the control circuit, and is connected to the second switch circuit to input the voltage of the power supply DC power; the second universal input-output end of the Bluetooth chip is used as the shutdown signal input end of the control circuit, and is connected to the charging management circuit to input the shutdown signal; the third universal input-output end of the Bluetooth chip and the fourth universal input-output end of the Bluetooth chip are used together as the connection status information input end of the control circuit, and are connected to the charging management circuit to input the connection status information; The switch reset signal terminal of the Bluetooth chip serves as the first level signal input terminal of the control circuit and is connected to the third switch circuit to input the first level signal; The fifth general input / output terminal of the Bluetooth chip is used as the self-locking signal output terminal of the control circuit and is connected to the first switch circuit to output a self-locking signal; The second end of the first capacitor is connected to the power ground.

10. A transmitter, characterized in that: The invention comprises a switch circuit for a wireless microphone device as claimed in any one of claims 1 to 9.

11. A receiver, characterized in that: The invention comprises a switch circuit for a wireless microphone device as claimed in any one of claims 1 to 9.

12. A microphone system, characterized in that: comprising a charging box, a transmitter as claimed in claim 10 and a receiver as claimed in claim 11; The charging box is connected to the transmitter and the receiver, and is used to output multiple shutdown carrier signals when the cover is detected to be closed, and is used to output multiple startup carrier signals when the cover is detected to be opened.

13. The microphone system according to claim 12, wherein: The charging box includes: A Hall sensor circuit, used to output a first sensor signal when a cover closing is detected, and to output a second sensor signal when a cover opening is detected; A main control circuit, connected to the Hall sensor circuit, configured to output a shutdown state signal according to the first sensor signal, and output a startup state signal according to the second sensor signal; The power management circuit is connected to the main control circuit, the transmitter and the receiver, and is used to receive the input direct current, and output a plurality of the power-on carrier signals according to the input direct current and the power-on status signal, and output a plurality of the power-off carrier signals according to the input direct current and the power-off status signal.

14. The microphone system according to claim 13, wherein: The power management circuit is further configured to disconnect the output of the power supply DC power in response to the current of the power supply DC power being less than or equal to a preset current.

Images