Portable pluggable Bluetooth microphone circuit

Abstract

The utility model discloses a portable pluggable Bluetooth microphone circuit which comprises a Bluetooth audio master control circuit, a TYPE C interface circuit, a battery management circuit, a microphone circuit, a key circuit, an LED indicating circuit and a test circuit. The above circuits form a set of portable pluggable Bluetooth microphone circuit. During use, the TYPE C interface circuit is used for being in pluggable connection with an electronic terminal device, the key circuit is matched with the Bluetooth audio master control circuit, and the Bluetooth audio master control circuit is switched through the key circuit, so that sound picked up by the microphone circuit is either uploaded to the electronic terminal device, and a local microphone mode is achieved. Or through the Bluetooth mode, the sound picked up by the microphone circuit is wirelessly connected with the Bluetooth earphone and is uploaded to the Bluetooth earphone.

Description

Technical Field

[0001] This utility model relates to the field of electronic products, and in particular to a portable pluggable Bluetooth microphone circuit. Background Technology

[0002] Currently, some electronic terminal devices do not have complete conference system functions. For example, desktop computers generally only have a host and a monitor, but lack microphones, cameras and speakers. If you want to configure a desktop computer into a complete conference system, you need to match these missing components one by one, which is costly.

[0003] Laptops typically come equipped with a fairly complete conferencing system, including a host, display, microphone, camera, and speakers. However, due to the low-end microphone configuration of laptops, when participants are more than 1 meter away from the laptop, the standard microphone struggles to pick up clear voices, resulting in poor sound quality during remote meetings.

[0004] Smartphones and tablets also offer relatively complete conferencing system functions, but they still suffer from the shortcomings of laptops. When using these electronic devices, people often wear headphones, which can improve sound quality; however, since conferencing is a two-way transmission, poor microphone pickup will still affect meeting quality.

[0005] Those skilled in the art will want to improve sound pickup during meetings by using an external microphone device without replacing the desktop computer, laptop, smartphone, tablet, or headset. Utility Model Content

[0006] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a portable pluggable Bluetooth microphone circuit, which can be used as a microphone in a conference system, thereby solving the problem of electronic terminal equipment having no microphone or the original electronic terminal equipment having poor microphone performance.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A portable pluggable Bluetooth microphone circuit includes a Bluetooth audio main control circuit, a Type-C interface circuit, a battery management circuit, a microphone circuit, a button circuit, an LED indicator circuit, and a test circuit; the Bluetooth audio main control circuit is electrically connected to the Type-C interface circuit, the battery management circuit, the microphone circuit, the button circuit, the LED indicator circuit, and the test circuit, respectively.

[0009] As a preferred embodiment, the microphone circuit includes a first microphone circuit and a second microphone circuit;

[0010] The MIC5_P, MIC5_N, and VMIC1 terminals of the first microphone circuit are connected to the D1, E1, and M7 pins of the Bluetooth audio main control circuit, respectively. The first microphone circuit includes a microphone MIC1, a bidirectional transient suppression diode ESD6, a bidirectional transient suppression diode ESD7, capacitors C26, C27, C28, and C29, and a resistor R7.

[0011] Power is introduced through the VMIC1 connector, and connected to the VDD terminal of the microphone MIC1 via resistor R7. The GND terminal of the microphone MIC1 is grounded to form a current loop. The first branch is formed by capacitor C28, capacitor C26 in parallel, and bidirectional transient suppression diode ESD7, and is electrically connected to the VDD terminal of the microphone MIC1. The second branch is formed by capacitor C27, capacitor C29 in parallel, and bidirectional transient suppression diode ESD6, and is electrically connected to the OUT terminal of the microphone MIC1.

[0012] As a preferred embodiment, the button circuit includes a button K1, a resistor R4, a bidirectional transient suppression diode ESD2, and a capacitor C31;

[0013] The KEY connection terminal of the button circuit is connected to the V7 pin of the Bluetooth audio main control circuit U1; the KEY connection terminal is supplied with power and connected to the 2nd pin of button K1 after passing through resistor R4; the 1st, 3rd, and 4th pins of button K1 are grounded; the third branch is formed by the parallel capacitor C31 and the bidirectional transient suppression diode ESD2, and button K1 controls the bidirectional transient suppression diode ESD2.

[0014] As a preferred embodiment, the battery management circuit includes a bidirectional transient suppression diode ESD1, a resistor R10, a resistor R12, a capacitor C34, and a battery protection chip U2;

[0015] The B+ and B- terminals of the battery management circuit are respectively connected to the lithium-ion battery. The SHIP_MODE control terminal of the battery management circuit is connected to the E4 pin of the Bluetooth audio main control circuit U1. The SHIP_MODE control terminal is connected to the battery protection chip U2 via resistor R12. The filter circuit is composed of resistor R10 and capacitor C34.

[0016] As a preferred embodiment, the LED indicator circuit includes diodes LED1, LED2, LED3, and LED4, transistor Q1, resistor R19, and resistor R11; wherein diodes LED1 and LED4 are independent light-emitting diodes; diodes LED2 are grouped in pairs; diodes LED3 are also grouped in pairs; and each diode has a corresponding protection resistor R5, resistor R14, resistor R13, resistor R22, resistor R15, and resistor R23.

[0017] The LED1 control terminal, LED2 control terminal, and LED3 control terminal of the LED indicator circuit are electrically connected to the D7 pin, E7 pin, and B3 pin of the Bluetooth audio main control circuit U1, respectively. Under the control of the Bluetooth audio main control circuit U1, the LED1 control terminal and LED2 control terminal control the on / off state of the diodes LED2 and LED3, respectively.

[0018] The control terminal of LED3 is connected to transistor Q1 via protection resistor R19, and grounded after voltage division by resistor R11; the control terminal C of transistor Q1 is connected to diodes LED1 and LED4 respectively.

[0019] As a preferred embodiment, the TYPE C interface circuit includes a constant voltage and constant current chip U3, a power switch chip, and a TYPE C interface J3. One end of the constant voltage and constant current chip U3 is connected to the lithium-ion battery, and the other end is connected to the power switch chip. The power switch chip is electrically connected to the TYPE C interface J3.

[0020] As a preferred embodiment, the constant voltage and constant current chip U3 is model CHG_CE3154.

[0021] As a preferred embodiment, the power switch chip is model LP5308QVF_DFN-8_2X2.

[0022] As a preferred option, the model number of the TYPE C interface J3 is TYPE-C-9P_1020910AR002.

[0023] As a preferred embodiment, the main chip U1 of the Bluetooth audio main control circuit is model BES2600YP.

[0024] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, a portable pluggable Bluetooth microphone circuit is formed by the Bluetooth audio main control circuit and the TYPE C interface circuit, battery management circuit, microphone circuit, button circuit, LED indicator circuit and test circuit that are electrically connected to it.

[0025] The TYPE C interface circuit is used for pluggable connection with electronic terminal devices (computers, laptops, mobile phones, etc.). The button circuit works in conjunction with the Bluetooth audio master control circuit. By switching the Bluetooth audio master control circuit through the button circuit, the sound picked up by the microphone circuit can either be uploaded to the electronic terminal device (i.e., in local microphone mode) or, through Bluetooth mode, the sound picked up by the microphone circuit can be wirelessly connected to the Bluetooth headset and uploaded to the Bluetooth headset.

[0026] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a portable pluggable Bluetooth microphone circuit according to an embodiment of the present invention.

[0028] Figure 2 This is a Bluetooth audio master control circuit diagram according to an embodiment of the present invention.

[0029] Figure 3 This is a circuit diagram of the TYPE C interface according to an embodiment of this utility model.

[0030] Figure 4 This is a microphone circuit diagram of an embodiment of the present invention.

[0031] Figure 5 This is a circuit diagram of a button according to an embodiment of the present invention.

[0032] Figure 6 This is a battery management circuit diagram according to an embodiment of the present invention.

[0033] Figure 7 This is an LED indicator circuit diagram of an embodiment of the present invention.

[0034] Figure 8 This is a test circuit diagram of an embodiment of the present invention.

[0035] Figure 9 This is a schematic diagram illustrating the working principle of an embodiment of this utility model.

[0036] Figure 10 This is a control flowchart of an embodiment of the present invention.

[0037] Explanation of reference numerals in the attached diagram:

[0038] 10. Bluetooth audio main control circuit 11. TYPE C interface circuit

[0039] 12. Battery management circuit 13. Microphone circuit

[0040] 14. Button circuit 15. LED indicator circuit

[0041] 16. Test circuit. Detailed Implementation

[0042] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0043] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0044] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0046] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0047] Please refer to Figures 1 to 10 As shown, it illustrates the specific structure of a preferred embodiment of the present invention. It is a portable, pluggable Bluetooth microphone circuit, such as... Figure 1 As shown, it includes a Bluetooth audio main control circuit 10, a TYPE C interface circuit 11, a battery management circuit 12, a microphone circuit 13, a button circuit 14, an LED indicator circuit 15, and a test circuit 16; the Bluetooth audio main control circuit 10 is electrically connected to the TYPE C interface circuit 11, the battery management circuit 12, the microphone circuit 13, the button circuit 14, the LED indicator circuit 15, and the test circuit 16 respectively.

[0048] like Figure 2 As shown, the main chip U1 of the Bluetooth audio main control circuit 10 is model BES2600YP. The BES2600YP Bluetooth audio SoC is Hengxuan's new generation of ultra-low power Bluetooth audio SoC. It adopts a three-in-one single-chip solution integrating Bluetooth, noise cancellation, and in-ear detection, supports dual-mode Bluetooth 5.3 and multi-point connection, and integrates a dual-core ARM STAR-MC1 CPU and an ultra-low power SensorHub subsystem. It possesses powerful application processing capabilities, supports open adaptive noise cancellation and AI noise cancellation, supports hearing aids and spatial audio, and supports voice wake-up and interactive functions.

[0049] like Figure 3 As shown, the TYPE C interface circuit 11 includes a charging management circuit 111 and a TYPE C interface J3. The charging management circuit 111 consists of a constant voltage and constant current chip U3 and a power switch chip. One end of the constant voltage and constant current chip U3 is connected to the lithium-ion battery, and the other end is connected to the power switch chip. The power switch chip is electrically connected to the TYPE C interface J3.

[0050] The constant voltage / constant current chip U3 is model number CHG_CE3154. The CE3154 is a complete constant current / constant voltage linear charger for single-cell lithium-ion batteries. Its SOT package and low external component count make the CE3154 ideal for space-constrained portable applications. Furthermore, the CE3154 is specifically designed to operate in USB power specifications. Due to its internal MOSFET structure, no external sensing resistor or blocking diode is required. Thermal feedback regulates the charging current to limit the die temperature during high-power operation or high ambient temperatures. The charging voltage is fixed at Vfloat, and the charging current can be externally programmed via a resistor between the prog pin and GND. The CE3154 automatically terminates the charging cycle when the charging current drops to 1 / 10 of the programmed value after the final float voltage is reached. When the input USB power is removed, the CE3154 automatically enters a low-current state, reducing the battery discharge current to less than 2μA. The CE3154 can enter a shutdown mode, reducing the power supply current to 25μA. Other features include a charging current M monitor, undervoltage lockout, automatic charging, and a status pin indicating charging termination.

[0051] The power switch chip is model LP5308QVF_DFN-8_2X2. This chip provides comprehensive protection for systems and loads that may encounter high current and input overvoltage conditions. Internally, the chip contains a 135mΩ MOSFET, and the overcurrent protection value can be set via an external resistor. When the current reaches the set threshold, the chip will shut down the power FET to prevent damage. Furthermore, the chip also features thermal shutdown protection; when the temperature exceeds a preset threshold, the switch will shut down to prevent damage.

[0052] The model number for the J3 TYPE-C interface is TYPE-C-9P_1020910AR002. USB Type-C supports reversible insertion and offers numerous features and advantages. The Type-C interface design allows for higher data transfer rates (up to 10Gbps) and supports higher power delivery (up to 100W), making it ideal for the needs of modern devices.

[0053] like Figure 4 As shown, the microphone circuit 13 includes a first microphone circuit and a second microphone circuit 13; wherein, the MIC5_P connection terminal, MIC5_N connection terminal, and VMIC1 connection terminal of the first microphone circuit are respectively connected to the D1 pin, E1 pin, and M7 pin of the Bluetooth audio main control circuit 10; the first microphone circuit has a microphone MIC1, a bidirectional transient suppression diode ESD6, a bidirectional transient suppression diode ESD7, a capacitor C26, a capacitor C27, a capacitor C28, a capacitor C29, and a resistor R7.

[0054] Power is introduced through the VMIC1 connector, and after passing through resistor R7, it is connected to the VDD terminal of microphone MIC1. The impedance of resistor R6 is used to attenuate external interference signals entering microphone MIC1. The GND terminal of microphone MIC1 is grounded to form a current loop. The first branch is formed by capacitor C28, parallel capacitor C26, and bidirectional transient suppression diode ESD7, and the first branch is electrically connected to the VDD terminal of microphone MIC1.

[0055] Capacitors C28 and C26 filter out external high-frequency noise entering the first branch, while the bidirectional transient suppression diode ESD7 clamps the attenuated interference signal voltage to a preset voltage, protecting microphone MIC1 from damage. The second branch is formed by capacitor C27, capacitor C29 connected in parallel, and the bidirectional transient suppression diode ESD6, and is electrically connected to the OUT terminal of microphone MIC1. Capacitors C27 and C29 filter out external high-frequency noise entering the second branch, and the bidirectional transient suppression diode ESD6 clamps the attenuated interference signal voltage to a preset voltage, protecting microphone MIC1 from damage.

[0056] like Figure 5As shown, the button circuit 14 includes a button K1, a resistor R4, a bidirectional transient suppression diode ESD2, and a capacitor C31. The KEY connection terminal of the button circuit 14 is connected to the V7 pin of the Bluetooth audio main control circuit 10; power is introduced into the KEY connection terminal, and after passing through the resistor R4, it is connected to pin 2 of the button K1; pins 1, 3, and 4 of the button K1 are grounded; a third branch is formed by the parallel capacitor C31 and the bidirectional transient suppression diode ESD2, and the button K1 controls the bidirectional transient suppression diode ESD2 to switch the button circuit 14 between high and low levels.

[0057] like Figure 6 As shown, the battery management circuit 12 includes a bidirectional transient voltage suppressor diode ESD1, resistors R10 and R12, capacitor C34, and battery protection chip U2. The B+ and B- terminals of the battery management circuit 12 are connected to the lithium-ion battery. The SHIP_MODE control terminal of the battery management circuit 12 is connected to pin E4 of the Bluetooth audio main control circuit 10, and the SHIP_MODE control terminal is connected to the battery protection chip U2 via resistor R12. A filter circuit composed of resistor R10 and capacitor C34 can filter out noise on the battery management circuit 12. The bidirectional transient voltage suppressor diode ESD1 is essentially a fast-response open-circuit device; when a transient voltage occurs in the circuit, it will conduct and form a low-impedance path, thereby guiding the excessively high voltage peak to ground and preventing damage to other components in the circuit.

[0058] The battery protection chip U2 is model LPB1010H. The LPB1010H is a highly integrated protection chip specifically optimized for small-capacity lithium-ion / polymer batteries. It uses an extremely small 1mm x 1mm DFN-4 package, providing an ideal choice for space-constrained designs.

[0059] like Figure 7 As shown, the LED indicator circuit 15 includes diodes LED1, LED2, LED3, and LED4, transistor Q1, resistors R19 and R11; wherein diodes LED1 and LED4 are independent light-emitting diodes; diodes LED2 are grouped in pairs; diodes LED3 are also grouped in pairs; each diode has a corresponding protection resistor R5, resistor R14, resistor R13, resistor R22, resistor R15, and resistor R23;

[0060] The LED1 control terminal, LED2 control terminal, and LED3 control terminal of the LED indicator circuit 15 are electrically connected to the D7 pin, E7 pin, and B3 pin of the Bluetooth audio main control circuit 10, respectively. Under the control of the Bluetooth audio main control circuit 10, the LED1 control terminal and LED2 control terminal control the on / off state of the diodes LED2 and LED3, respectively.

[0061] The control terminal of LED3 is connected to transistor Q1 via protection resistor R19, and grounded after voltage division by resistor R11; the control terminal C of transistor Q1 is connected to diodes LED1 and LED4 respectively.

[0062] like Figure 9 As shown, when in use, the TYPE C interface J3 is plugged into electronic terminal devices such as computers, laptops, and mobile phones to achieve connection with these electronic terminal devices. When the button K1 is pressed or toggled, the main chip U1 of the Bluetooth audio main control circuit 10 switches between local microphone mode and Bluetooth mode.

[0063] In local microphone mode, microphones MIC1 and MIC2, acting as designated sound pickup devices for electronic terminal devices, disable the original microphone functions of these devices and replace them with external microphones MIC1 and MIC2. After picking up sound, microphones MIC1 and MIC2 upload it to these electronic terminal devices via the TYPE C interface J3.

[0064] Therefore, the portable pluggable Bluetooth microphone circuit of this invention forms a conference system with these electronic terminal devices. The external microphone device using the new technology has a clearer sound pickup effect, and when combined with the original external speakers on these electronic terminal devices, it provides better sound communication during remote conferences. This overcomes the problem of unclear sound in remote conferences without requiring replacement of the electronic terminal devices. Furthermore, the external microphone device using the newer technology has a greater sound pickup distance than the original microphones on these electronic terminal devices.

[0065] In Bluetooth mode, microphones MIC1 and MIC2 connect wirelessly to the Bluetooth headset via the Bluetooth function configured in the main chip U1 of the Bluetooth audio main control circuit 10. Microphones MIC1 and MIC2, as the designated sound pickup devices of the Bluetooth headset, will disable the original microphone function of the Bluetooth headset. Thus, the portable pluggable Bluetooth microphone circuit of this utility model and the Bluetooth headset form a conference system. The external microphone device with the new technology has a clearer sound pickup effect. Combined with the original in-ear, over-ear, clip-on, and bone conduction speakers on the Bluetooth headset, it can achieve better sound dialogue effect during remote conferences.

[0066] like Figure 10 As shown, it illustrates the portable pluggable Bluetooth microphone circuit of this invention and the control principle of its control system. This enables the aforementioned microphone mode or Bluetooth mode.

[0067] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A portable pluggable Bluetooth microphone circuit, characterized in that: It includes a Bluetooth audio main control circuit (10), a TYPE C interface circuit (11), a battery management circuit (12), a microphone circuit (13), a button circuit (14), an LED indicator circuit (15), and a test circuit (16); the Bluetooth audio main control circuit (10) is electrically connected to the TYPE C interface circuit (11), the battery management circuit (12), the microphone circuit (13), the button circuit (14), the LED indicator circuit (15), and the test circuit (16), respectively. The main chip U1 of the Bluetooth audio main control circuit (10) is model BES2600YP; The TYPE C interface circuit (11) includes a charging management circuit (111) and a TYPE C interface J3. The charging management circuit (111) has a constant voltage and constant current chip U3 and a power switch chip. One end of the constant voltage and constant current chip U3 is connected to the lithium-ion battery, and the other end is connected to the power switch chip. The power switch chip is electrically connected to the TYPE C interface J3. The battery management circuit (12) includes a bidirectional transient suppression diode ESD1, a resistor R10, a resistor R12, a capacitor C34, and a battery protection chip U2; The microphone circuit (13) includes a first microphone circuit (13) and a second microphone circuit (13), and each microphone is equipped with a bidirectional transient suppression diode.

2. The portable pluggable Bluetooth microphone circuit according to claim 1, characterized in that: The MIC5_P, MIC5_N, and VMIC1 terminals of the first microphone circuit are respectively connected to the D1, E1, and M7 pins of the Bluetooth audio main control circuit (10); the first microphone circuit has a microphone MIC1, a bidirectional transient suppression diode ESD6, a bidirectional transient suppression diode ESD7, a capacitor C26, a capacitor C27, a capacitor C28, a capacitor C29, and a resistor R7. Power is introduced through the VMIC1 connector, and connected to the VDD terminal of the microphone MIC1 via resistor R7. The GND terminal of the microphone MIC1 is grounded to form a current loop. The first branch is formed by capacitor C28, capacitor C26 in parallel, and bidirectional transient suppression diode ESD7, and is electrically connected to the VDD terminal of the microphone MIC1. The second branch is formed by capacitor C27, capacitor C29 in parallel, and bidirectional transient suppression diode ESD6, and is electrically connected to the OUT terminal of the microphone MIC1.

3. The portable pluggable Bluetooth microphone circuit according to claim 1, characterized in that: The button circuit (14) includes a button K1, a resistor R4, a bidirectional transient suppression diode ESD2, and a capacitor C31; The KEY connection terminal of the button circuit (14) is connected to the V7 pin of the Bluetooth audio main control circuit (10); the KEY connection terminal is connected to the power supply, and after passing through the resistor R4, it is connected to the 2nd pin of the button K1; the 1st, 3rd and 4th pins of the button K1 are grounded; the third branch is formed by the parallel capacitor C31 and the bidirectional transient suppression diode ESD2, and the button K1 controls the bidirectional transient suppression diode ESD2.

4. The portable pluggable Bluetooth microphone circuit according to claim 1, characterized in that: The B+ and B- terminals of the battery management circuit (12) are respectively connected to the lithium-ion battery. The SHIP_MODE control terminal of the battery management circuit (12) is connected to the E4 pin of the Bluetooth audio main control circuit (10). The SHIP_MODE control terminal is connected to the battery protection chip U2 via resistor R12. The filter circuit is composed of resistor R10 and capacitor C34.

5. A portable pluggable Bluetooth microphone circuit according to claim 1, characterized in that: The LED indicator circuit (15) includes diodes LED1, LED2, LED3, and LED4, transistor Q1, resistor R19, and resistor R11; wherein, diodes LED1 and LED4 are independent light-emitting diodes; diodes LED2 are in groups of two light-emitting beads; diodes LED3 are also in groups of two light-emitting beads, and each diode has a corresponding protection resistor R5, resistor R14, resistor R13, resistor R22, resistor R15, and resistor R23; The LED1 control terminal, LED2 control terminal, and LED3 control terminal of the LED indicator circuit (15) are electrically connected to the D7 pin, E7 pin, and B3 pin of the Bluetooth audio main control circuit (10), respectively. Under the control of the Bluetooth audio main control circuit (10), the LED1 control terminal and LED2 control terminal control the on / off state of the diode LED2 and the diode LED3, respectively. The control terminal of LED3 is connected to transistor Q1 via protection resistor R19, and grounded after voltage division by resistor R11; the control terminal C of transistor Q1 is connected to diodes LED1 and LED4 respectively.

6. The portable pluggable Bluetooth microphone circuit according to claim 1, characterized in that: The constant voltage and constant current chip U3 is model number CHG_CE3154.

7. The portable pluggable Bluetooth microphone circuit according to claim 1, characterized in that: The power switch chip is model LP5308QVF_DFN-8_2X2.

8. A portable pluggable Bluetooth microphone circuit according to claim 1, characterized in that: The model number of the J3 interface with TYPE C is TYPE-C-9P_1020910AR002.

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