Wireless Bluetooth microphone system

Abstract

The utility model discloses a wireless Bluetooth microphone system, which comprises a plurality of transmitters and at least one receiver, the transmitter comprises an audio input unit and first Bluetooth control units electrically connected to the audio input unit, and wireless connection is formed between the adjacent first Bluetooth control units; the receiver comprises a second Bluetooth control unit and an audio output unit electrically connected to the second Bluetooth control unit; the second Bluetooth control unit is wirelessly connected to the at least one first Bluetooth control unit. The wireless Bluetooth microphone system is provided with a plurality of transmitters and at least one receiver, so that multiple persons can input audio at the same time, and the use requirements of multiple users are met; the wireless connection between the transmitters can realize the cooperative work between the transmitters, so that the flexibility and interactivity are enhanced; in addition, the wireless connection between the transmitter and the receiver ensures the stable and efficient transmission of audio signals, improves the quality and reliability of audio transmission, and greatly improves the user experience.

Description

Technical Field

[0001] This utility model relates to the field of microphone technology, and in particular to a wireless Bluetooth microphone system. Background Technology

[0002] In the field of modern audio transmission, wireless microphone systems are widely used in various scenarios such as conferences, performances, and education due to their ability to eliminate the constraints of cables. However, existing wireless microphone systems still have certain limitations. Most traditional wireless microphone systems adopt a one-to-one signal transmission mode, supporting only a single microphone and receiver connection. This makes it difficult to meet the needs of multiple people using microphones for audio input simultaneously, which is extremely inconvenient in scenarios such as multi-person conferences and large-scale performances. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of existing wireless microphone systems that cannot meet the needs of multiple users, and to provide a wireless Bluetooth microphone system.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model provides a wireless Bluetooth microphone system, including: a plurality of transmitters and at least one receiver; each transmitter includes an audio input unit and a first Bluetooth control unit electrically connected to the audio input unit, and adjacent first Bluetooth control units are wirelessly connected; the receiver includes a second Bluetooth control unit and an audio output unit electrically connected to the second Bluetooth control unit; the second Bluetooth control unit is wirelessly connected to at least one first Bluetooth control unit.

[0006] In one embodiment, the first Bluetooth control unit includes a first Bluetooth chip, and adjacent first Bluetooth chips are wirelessly connected; the second Bluetooth control unit includes a second Bluetooth chip; the second Bluetooth chip is wirelessly connected to one or two first Bluetooth chips.

[0007] In one embodiment, the first Bluetooth chip is connected to a first crystal oscillator module and a first power supply module; the second Bluetooth chip is connected to a second crystal oscillator module and a second power supply module.

[0008] In one embodiment, the number of transmitters is four, and the number of receivers is one; the second Bluetooth control unit further includes a third Bluetooth chip; the second Bluetooth chip is wirelessly connected to one or two of the first Bluetooth chips; the third Bluetooth chip is wirelessly connected to another one or two of the first Bluetooth chips; the third Bluetooth chip is also connected to the second Bluetooth chip.

[0009] In one embodiment, the second Bluetooth chip and the third Bluetooth chip are connected via a synchronous serial communication interface.

[0010] In one embodiment, both the second Bluetooth chip and the third Bluetooth chip are connected to the second crystal oscillator module.

[0011] In one embodiment, the second Bluetooth control unit further includes a power supply control module; the power supply control module has an input terminal, a control terminal, and an output terminal; the input terminal is connected to the second power supply module; the control terminal is connected to the second Bluetooth chip; and the output terminal is connected to the third Bluetooth chip.

[0012] In one embodiment, the first Bluetooth chip, the second Bluetooth chip, and the third Bluetooth chip are all ATS3031 chips.

[0013] In one embodiment, the audio output unit includes a left channel output module and a right channel output module; both the left channel output module and the right channel output module are connected to the second Bluetooth chip.

[0014] In one embodiment, the second Bluetooth chip is further connected to a digital-to-analog amplifier module and / or a headphone amplifier module.

[0015] Compared with existing technologies, the advantages of this wireless Bluetooth microphone system are as follows: by providing several transmitters and at least one receiver, it supports multiple users to use the microphone for audio input simultaneously, meeting the needs of multiple users; the wireless connection between transmitters enables information sharing and collaborative work between transmitters, enhancing flexibility and interactivity; in addition, the wireless connection between transmitters and receivers ensures stable and efficient transmission of audio signals, improving the quality and reliability of audio transmission and providing users with a good user experience.

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the wireless Bluetooth microphone system provided by this utility model. Figure 1 ;

[0019] Figure 2A schematic diagram of the wireless Bluetooth microphone system provided by this utility model. Figure 2 ;

[0020] Figure 3 A block diagram of the first Bluetooth control unit provided by this utility model;

[0021] Figure 4 A block diagram illustrating the second Bluetooth control unit provided by this utility model. Figure 1 ;

[0022] Figure 5 A block diagram illustrating the second Bluetooth control unit provided by this utility model. Figure 2 ;

[0023] Figure 6 Circuit schematic diagram of the first Bluetooth chip and the first crystal oscillator module provided for this utility model;

[0024] Figure 7 The circuit schematic diagram of the second Bluetooth chip and the second crystal oscillator module provided by this utility model;

[0025] Figure 8 The circuit schematic diagram of the third Bluetooth chip provided by this utility model;

[0026] Figure 9 Circuit diagram of the battery power supply component and the first power supply control component provided by this utility model;

[0027] Figure 10 The circuit diagram of the USB power supply component and the second power supply control component provided by this utility model. Attached Figure Description

[0029] 1. Transmitter; 11. Audio Input Unit; 12. First Bluetooth Control Unit; 121. First Bluetooth Chip; 122. First Crystal Oscillator Module; 123. First Power Supply Module; 2. Receiver; 21. Second Bluetooth Control Unit; 211. Second Bluetooth Chip; 212. Second Crystal Oscillator Module; 213. Second Power Supply Module; 2131. Battery Power Supply Component; 2132. USB Power Supply Component; 214. Third Bluetooth Chip; 215. Power Supply Control Module; 2151. First Power Supply Control Component; 2152. Second Power Supply Control Component; 216. Digital-to-Analog Amplifier Module; 217. Headphone Amplifier Module; 218. Push-Button Switch Module; 219. LED Module; 22. Audio Output Unit; 221. Left Channel Output Module; 222. Right Channel Output Module. Detailed Implementation

[0030] 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 specific embodiments.

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] 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 utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0037] See Figures 1 to 10 As shown, this utility model embodiment provides a wireless Bluetooth microphone system, including: a plurality of transmitters 1 and at least one receiver 2; the transmitter 1 includes an audio input unit 11 and a first Bluetooth control unit 12 electrically connected to the audio input unit 11, and adjacent first Bluetooth control units 12 are wirelessly connected; the receiver 2 includes a second Bluetooth control unit 21 and an audio output unit 22 electrically connected to the second Bluetooth control unit 21; the second Bluetooth control unit 21 is wirelessly connected to at least one first Bluetooth control unit 12.

[0038] Specifically, all the first Bluetooth control units 12 of the transmitters 1 are wirelessly connected to each other via the BLE (Bluetooth Low Energy) protocol, and the first Bluetooth control unit 12 and the second Bluetooth control unit 21 are wirelessly connected via LE audio (Bluetooth Low Energy Audio) broadcasting technology.

[0039] The design principle of this wireless Bluetooth microphone system is based on the application of Bluetooth technology. By setting up an architecture with several transmitters 1 and at least one receiver 2, the audio input unit 11 of each transmitter 1 collects audio signals, which are then processed by the first Bluetooth control unit 12 to convert the audio signals into a signal format that can be transmitted via Bluetooth. The receiver 2 receives the signals through the second Bluetooth control unit 21 and outputs the audio through the audio output unit 22. All the first Bluetooth control units 12 of the transmitters 1 are wirelessly connected using the BLE protocol, enabling information exchange and collaborative work between the transmitters 1. The first Bluetooth control unit 12 and the second Bluetooth control unit 21 are wirelessly connected using LE audio broadcasting technology, ensuring stable transmission of audio signals from the transmitters 1 to the receivers 2. This design fully utilizes the characteristics of different Bluetooth technologies to build a complete wireless audio transmission system.

[0040] This wireless Bluetooth microphone system achieves several important technical benefits. Firstly, by using several transmitters 1 and at least one receiver 2, each receiver 2 can wirelessly connect to one or more transmitters 1, supporting simultaneous audio input by multiple users. This meets the needs of multi-user environments, such as conferences and performances, where multiple microphones can be used simultaneously. Secondly, employing the BLE protocol for wireless connection between transmitters 1 enables information sharing and collaborative work, enhancing the system's flexibility and interactivity. Furthermore, the application of LE audio broadcasting technology ensures stable and efficient transmission of audio signals from transmitter 1 to receiver 2, improving the quality and reliability of audio transmission. This results in a clear and accurate output audio that reproduces the input sound, providing users with a superior experience.

[0041] See Figures 3 to 7 As shown, in one specific embodiment, the first Bluetooth control unit 12 includes a first Bluetooth chip 121, and adjacent first Bluetooth chips 121 are wirelessly connected; the second Bluetooth control unit 21 includes a second Bluetooth chip 211; the second Bluetooth chip 211 is wirelessly connected to one or two first Bluetooth chips 121.

[0042] Specifically, this design principle revolves around the core role of the Bluetooth chip in a wireless Bluetooth microphone system. The first Bluetooth control unit 12 uses a first Bluetooth chip 121, and the second Bluetooth control unit 21 uses a second Bluetooth chip 211. This chip-based design facilitates integration and miniaturization, highly integrating Bluetooth control functions onto the chip and reducing system size and complexity. By wirelessly connecting each second Bluetooth chip 211 to one or two first Bluetooth chips 121, a one-to-one or many-to-one audio transmission relationship can be established architecturally. This design allows the system to integrate and process audio signals from multiple transmitters 1 at the receiving end, while utilizing the communication capabilities of the Bluetooth chip to ensure the stability and accuracy of signal transmission. In specific application scenarios, multiple transmitters 1 can correspond to one receiver 2. Through this chip connection method, multiple users can use the microphone simultaneously, and the signals can be effectively converged at the receiving end, providing a basic architecture for diverse usage scenarios.

[0043] This design achieves several technical benefits. In terms of functional expandability, each second Bluetooth chip 211 connects to one or two first Bluetooth chips 121, enabling the system to process audio signals from multiple transmitters 1 simultaneously. This facilitates simultaneous microphone use by multiple users, enhancing the system's applicability in multi-user scenarios such as conferences and performances, meeting the needs of multiple speakers. Regarding signal stability, the Bluetooth chips themselves have good anti-interference capabilities. Through reasonable chip connection and signal processing mechanisms, signal loss and interference can be effectively reduced, ensuring stable audio signal transmission. Simultaneously, this many-to-one connection method also provides a degree of signal redundancy. If one transmitter 1 experiences a signal transmission problem, the signal from another transmitter 1 can still be transmitted normally, improving system reliability. Furthermore, the chip-based design results in relatively low overall system power consumption, which helps extend the device's battery life and reduce operating costs.

[0044] In one specific embodiment, the first Bluetooth chip 121 is connected to the first crystal oscillator module 122 and the first power supply module 123; the second Bluetooth chip 211 is connected to the second crystal oscillator module 212 and the second power supply module 213.

[0045] Specifically, the design principle of this embodiment is to improve the functionality of the Bluetooth chip in the wireless Bluetooth microphone system, enabling it to perform signal processing and transmission stably and efficiently. The first Bluetooth chip 121 is connected to the first crystal oscillator module 122 and the first power supply module 123, and the second Bluetooth chip 211 is connected to the second crystal oscillator module 212 and the second power supply module 213. This is a reasonable combination based on the characteristics and functions of each module. The crystal oscillator module provides a precise clock signal to the Bluetooth chip, ensuring the synchronous operation of the internal circuits of the chip, thereby guaranteeing the accuracy and stability of signal processing. The power supply module provides a stable power supply to the Bluetooth chip, maintaining its normal operating state.

[0046] During operation, the first power supply module 123 provides the necessary power to the first Bluetooth chip 121, enabling it to operate. The first crystal oscillator module 122 generates a precise clock signal, which the first Bluetooth chip 121 uses to process the audio signal from the audio input unit 11, converting it into a Bluetooth signal suitable for wireless transmission. Then, the first Bluetooth chip 121 transmits the processed Bluetooth signal as electromagnetic waves. At the receiver 2, the second power supply module 213 powers the second Bluetooth chip 211, and the second crystal oscillator module 212 provides a clock signal to ensure normal chip operation. The second Bluetooth chip 211 receives Bluetooth signals transmitted from the first transceiver antenna in real time, and performs decoding, demodulation, and other processing on the received signals to reconstruct the original audio signal, which is then transmitted to the audio output unit 22 for playback. Throughout this process, the crystal oscillator module ensures the synchronization of signal processing, and the power supply module maintains the chip's operating state.

[0047] This design achieves significant technical benefits. In signal processing, the precise clock signal provided by the crystal oscillator module enables the Bluetooth chip to accurately process audio signals, improving signal processing accuracy and stability, thereby ensuring audio quality. Regarding power supply, an independent power supply module provides a stable power supply to the Bluetooth chip, avoiding the impact of power fluctuations on chip operation and enhancing system reliability.

[0048] In one specific embodiment, both the first power supply module 123 and the second power supply module 213 include a battery power supply component 2131 and / or a USB power supply component 2132.

[0049] Specifically, this design principle aims to provide a flexible power supply solution for wireless Bluetooth microphone systems that is adaptable to different scenarios. The battery-powered component 2131 is highly portable and rechargeable, suitable for scenarios requiring mobile use, such as outdoor performances and mobile conferences. Users do not need to rely on external power outlets; the system can operate normally using battery power. The USB-powered component 2132, utilizing the widely available USB interface, can easily connect to devices such as computers and power banks for power supply. In scenarios with fixed power access, such as indoor meetings and offices, it can provide stable power supply and also facilitates use of the device while charging. Using the battery-powered component 2131 and the USB-powered component 2132 as optional solutions for the first power supply module 123 and the second power supply module 213 fully considers the power supply needs of users in different usage environments and under different requirements, enhancing the system's applicability and flexibility.

[0050] When using the battery-powered component 2131, the battery stores electrical energy after being fully charged. When the system is turned on, the chemical energy inside the battery is converted into electrical energy through an electrochemical reaction. After processing by the power supply module's circuitry, a stable voltage and current that meet the operating requirements of the first Bluetooth chip 121 or the second Bluetooth chip 211 are output, providing power support for the chip and related circuits and ensuring the normal operation of the wireless Bluetooth microphone system. When the battery is low on power, it can be charged using a dedicated charger. During charging, electrical energy flows back into the battery, restoring it to its stored energy state. If using the USB-powered component 2132, one end of the USB data cable is connected to the device's USB port, and the other end is connected to an external power supply device, such as a computer's USB port or a power bank. The electrical energy from the external power supply device is transmitted to the power supply module via the USB data cable. The power supply module performs voltage regulation and filtering on the electrical energy, outputting a stable voltage and current to power the Bluetooth chip and other system components. During the power supply process, the USB-powered component 2132 can also monitor the power supply status in real time to ensure stable and safe power supply.

[0051] This design achieves several technical benefits. In terms of ease of use, the battery-powered component 2131 frees the wireless Bluetooth microphone system from dependence on a fixed power source, allowing users to freely use the device outdoors or in mobile environments, greatly improving its flexibility. The USB-powered component 2132 utilizes a common USB interface, enabling users to power the system anytime, anywhere via various devices. For example, it can be directly connected to a computer's USB port in the office, or powered by a power bank when out and about, lowering the barrier to entry for users. Regarding battery life and stability, the battery-powered component 2131 has a certain amount of stored power, sufficient to meet the system's continuous operation needs for a certain period. The USB-powered component 2132, when connected to a stable external power source, provides uninterrupted power, ensuring stable operation over extended periods. Furthermore, the selectable design of two power modes reduces the system's reliance on a single power supply method, improving system reliability. If one power mode malfunctions, the user can quickly switch to the other, ensuring the normal operation of the wireless Bluetooth microphone system.

[0052] See Figures 6 to 7 As shown, in a specific embodiment, the first crystal oscillator module 122 and the second crystal oscillator module 212 have basically the same structure, both including crystal oscillator Y1, first capacitor C21, second capacitor C20 and first resistor R27; pins 3 and 1 of crystal oscillator Y1 are respectively connected to pins 43 and 44 of the first Bluetooth chip 121 or pins 43 and 44 of the second Bluetooth chip 211; one end of the first capacitor C21 is connected to pin 3 of crystal oscillator Y1, and the other end is connected to pins 2 and 4 of crystal oscillator Y1, one end of the first resistor R27 and one end of the second capacitor C20; the other end of the second capacitor C20 is connected to pin 1 of crystal oscillator Y1; the other end of the first resistor R27 is grounded.

[0053] Specifically, the design principle of the first crystal oscillator module 122 and the second crystal oscillator module 212 is based on providing stable and accurate clock signals for the first Bluetooth chip 121 and the second Bluetooth chip 211. Crystal oscillator Y1, as the core component of the module, can generate a fixed-frequency oscillation signal. Pins 3 and 1 of crystal oscillator Y1 are connected to pins 43 and 44 of the first Bluetooth chip 121 or the second Bluetooth chip 211, respectively. This connection method allows the oscillation signal generated by crystal oscillator Y1 to be directly transmitted to the Bluetooth chip, providing a clock reference for various circuits inside the chip and ensuring that the various functional modules of the chip can work synchronously and orderly. The first capacitor C21, the second capacitor C20, and the first resistor R27 play a role in assisting and optimizing the operation of crystal oscillator Y1. The capacitors can adjust the load capacitance of crystal oscillator Y1, enabling it to operate at a suitable frequency and stability; the grounding connection of the resistor helps stabilize the oscillation state of crystal oscillator Y1, reducing interference and noise, and ensuring the quality of the output clock signal.

[0054] When the first crystal oscillator module 122 or the second crystal oscillator module 212 starts working, crystal oscillator Y1 begins to oscillate under the excitation of the power supply, forming an electrical signal of a specific frequency. This signal is transmitted through pins 3 and 1 of crystal oscillator Y1 to pins 43 and 44 of the first Bluetooth chip 121 or the second Bluetooth chip 211, respectively, providing a clock signal for the Bluetooth chip. In this process, the first capacitor C21 and the second capacitor C20 play a role. Together with crystal oscillator Y1, they form a resonant circuit, adjusting the load capacitance of crystal oscillator Y1 to make the oscillation frequency of crystal oscillator Y1 more stable and accurate. The first resistor R27 is grounded, providing a stable reference potential for crystal oscillator Y1, reducing the influence of external interference on the oscillation of crystal oscillator Y1, and ensuring the purity of the oscillation signal. In this way, the first crystal oscillator module 122 and the second crystal oscillator module 212 can continuously provide stable and accurate clock signals to the first Bluetooth chip 121 and the second Bluetooth chip 211, respectively, enabling the Bluetooth chip to operate its various internal functions normally.

[0055] See Figure 1 As shown, in one specific embodiment, there are two transmitters 1 and four receivers 2; both first Bluetooth chips 121 can be wirelessly connected to one to four second Bluetooth chips 211 via LE audio broadcasting technology, and the two first Bluetooth chips 121 are wirelessly connected to each other via the BLE protocol.

[0056] Specifically, the core principle of this design lies in combining the advantages of different Bluetooth technologies to build a highly efficient, flexible, and stable wireless Bluetooth microphone system. It employs two transmitters 1 and four receivers 2, forming a many-to-many connection architecture, capable of meeting the needs of multiple users simultaneously using microphones and outputting audio through multiple channels in complex scenarios. Each transmitter 1 is equipped with a first Bluetooth chip 121, and each receiver 2 is equipped with a second Bluetooth chip 211. This simple single-chip design helps reduce cost, power consumption, and system complexity. LE audio broadcasting technology is used to connect the first Bluetooth chip 121 with the four second Bluetooth chips 211. This technology has efficient and stable audio transmission capabilities, enabling simultaneous broadcasting of audio signals to multiple receivers 2, improving the range and efficiency of audio propagation. The two first Bluetooth chips 121 are wirelessly connected via the BLE protocol. Leveraging the low power consumption and stable data transmission characteristics of BLE, information exchange and synchronization between the transmitters 1 are achieved, ensuring the coordinated operation of the entire system.

[0057] After the system starts working, the audio input unit 11 of transmitter 1 first collects external sound signals and converts them into electrical signals, which are then transmitted to the first Bluetooth chip 121. The first Bluetooth chip 121 encodes and modulates the electrical signals, converting them into digital audio signals suitable for transmission using LE audio broadcasting technology. Then, the two first Bluetooth chips 121 communicate via the BLE protocol, exchanging information such as audio data status and operating mode to ensure coordinated operation between transmitter 1. Next, the two first Bluetooth chips 121 simultaneously broadcast the processed audio signals using LE audio broadcasting technology. The second Bluetooth chips 211 of the four receivers 2 continuously monitor the LE audio broadcast signals. Once a signal is received, they decode and demodulate it to restore the original audio signal. Finally, the audio signal is transmitted to the audio output unit 22 of receiver 2, converted into sound, and played out, completing the entire audio input-to-output process.

[0058] This design achieves several significant technical benefits. In terms of audio transmission efficiency, LE audio broadcasting technology enables the simultaneous and efficient transmission of audio signals from two transmitters 1 to one to four receivers 2, greatly improving the speed and range of audio propagation, making it suitable for scenarios requiring wide coverage, such as large conferences and performances. Regarding system stability, on the one hand, LE audio broadcasting technology itself has strong anti-interference capabilities, ensuring stable audio signal transmission; on the other hand, the two first Bluetooth chips 121 are connected via the BLE protocol, achieving synchronization and information exchange between transmitters 1, avoiding signal conflicts and interference, further enhancing system stability. In terms of usage flexibility, two transmitters 1 can meet the needs of multiple people using microphones simultaneously, while four receivers 2 can output audio to different devices or locations, providing users with more usage options. Furthermore, the single-chip design reduces system cost and power consumption, extends device battery life, and improves the system's cost-effectiveness and practicality. It is understood that in other embodiments, the number of transmitters 1 and receivers 2 can be set to other different numbers as needed.

[0059] See Figure 2 , Figures 5 to 8 As shown, in one specific embodiment, there are four transmitters 1 and one receiver 2; the second Bluetooth control unit 21 also includes a third Bluetooth chip 214; the second Bluetooth chip 211 is wirelessly connected to one or two of the first Bluetooth chips 121; the third Bluetooth chip 214 is wirelessly connected to another one or two of the first Bluetooth chips 121; the third Bluetooth chip 214 is also connected to the second Bluetooth chip 211.

[0060] Specifically, the four first Bluetooth chips 121 are connected to each other via the BLE protocol, and one or two of the first Bluetooth chips 121 are wirelessly connected to the second Bluetooth chip 211 via LE audio broadcasting technology; the other one or two first Bluetooth chips 121 are also wirelessly connected to the third Bluetooth chip 214 via LE audio broadcasting technology.

[0061] When the system starts running, the audio input units 11 of the four transmitters 1 respectively collect external sound signals and convert them into electrical signals, which are then transmitted to their respective first Bluetooth chips 121. The first Bluetooth chips 121 encode and modulate the electrical signals, converting them into digital audio signals suitable for transmission using LE audio broadcasting technology. Simultaneously, the four first Bluetooth chips 121 communicate via the BLE protocol, exchanging information such as audio data status and operating modes to achieve synchronization between the transmitters 1. Next, two of the first Bluetooth chips 121 send the processed audio signals to the second Bluetooth chip 211 via LE audio broadcasting technology, while the other two first Bluetooth chips 121 send the signals to the third Bluetooth chip 214. The second Bluetooth chip 211 and the third Bluetooth chip 214 respectively receive and process their respective connected audio signals. After processing the audio signals, the third Bluetooth chip 214 sends the processed audio signals back to the second Bluetooth chip 211. The second Bluetooth chip 211 integrates and further processes the four audio signals from itself and the third Bluetooth chip 214, and finally transmits the processed signals to the audio output unit 22, which converts them into sound and plays them out, completing the entire audio input to output process.

[0062] This design achieves several significant technical benefits. In terms of audio processing capabilities, the collaborative work of the second Bluetooth chip 211 and the third Bluetooth chip 214 enables the simultaneous processing of four audio signals, meeting the needs of multiple users using microphones simultaneously and making it suitable for scenarios involving multiple speakers, such as conferences and training sessions. Regarding signal transmission stability, the combination of LE audio broadcasting technology and the BLE protocol effectively reduces signal interference and loss, ensuring stable audio signal transmission. The third Bluetooth chip 214 alleviates the processing burden on the second Bluetooth chip 211, improving the overall system's processing efficiency and reliability. In terms of device integration, the design of one receiver 2 paired with four transmitters 1 reduces the number and size of devices, lowers cost and power consumption, and facilitates portability and use. Furthermore, this design enhances system scalability; if more audio signals need to be processed, the number of third Bluetooth chips 214 or transmitters 1 can be increased.

[0063] See Figure 5 As shown, in one specific embodiment, the second Bluetooth chip 211 and the third Bluetooth chip 214 are connected through a synchronous serial communication interface.

[0064] Specifically, this design principle aims to further optimize the data interaction between the second Bluetooth chip 211 and the third Bluetooth chip 214 in a wireless Bluetooth microphone system. Throughout the system, the second Bluetooth chip 211 and the third Bluetooth chip 214 need to work collaboratively to process audio signals from multiple transmitters 1. The synchronous serial communication interface offers unique advantages, enabling orderly and stable data transmission between the second Bluetooth chip 211 and the third Bluetooth chip 214 under clock signal synchronization. Through this interface connection, the second Bluetooth chip 211 and the third Bluetooth chip 214 can accurately exchange audio data, control commands, and other information, ensuring synchronization and coordination in audio signal processing. This design, based on considerations of the Bluetooth chip's functional characteristics and the overall system requirements, provides a reliable communication foundation for achieving efficient and accurate audio signal processing and transmission.

[0065] When the system starts running, the second Bluetooth chip 211 and the third Bluetooth chip 214, after receiving audio signals from the first Bluetooth chip 121, begin data exchange through a synchronous serial communication interface. A clock signal serves as the synchronization reference, coordinating the data transmission rhythm. The third Bluetooth chip 214 sends the processed audio signal and related status information bit by bit to the second Bluetooth chip 211, driven by the clock signal, according to the protocol rules of the synchronous serial communication interface. The second Bluetooth chip 211 accurately receives this data based on the same clock signal. Simultaneously, the second Bluetooth chip 211 can also send control commands to the third Bluetooth chip 214 through this interface, such as adjusting processing parameters and synchronization modes. Throughout the process, the synchronous serial communication interface ensures that data transmission between the second Bluetooth chip 211 and the third Bluetooth chip 214 is orderly and accurate, avoiding data conflicts and errors, enabling them to work closely together to process and integrate the four audio signals.

[0066] This design achieves several significant technical benefits. Regarding data transmission accuracy, the synchronous serial communication interface, synchronized by a clock signal, greatly improves the accuracy of data transmission between the second Bluetooth chip 211 and the third Bluetooth chip 214. This ensures that the audio signal processed by the third Bluetooth chip 214 can be transmitted completely and error-free to the second Bluetooth chip 211, avoiding audio distortion or loss due to data transmission errors, thereby improving the overall audio quality of the system. In terms of system collaboration, the second Bluetooth chip 211 and the third Bluetooth chip 214 can achieve efficient collaborative operation through this interface. They can exchange information in real time, synchronize their working states, and adjust processing strategies according to actual needs, improving the overall processing efficiency and stability of the system. Furthermore, the use of the synchronous serial communication interface simplifies the system's hardware design, reduces wiring complexity and cost, and also improves the system's reliability and maintainability.

[0067] See Figures 7 to 8 As shown, in one specific embodiment, both the second Bluetooth chip 211 and the third Bluetooth chip 214 are connected to the second crystal oscillator module 212.

[0068] Specifically, when the second Bluetooth control unit 21 also includes a third Bluetooth chip 214, the second crystal oscillator module 212 includes a crystal oscillator Y1, a first capacitor C21, a second capacitor C20, and a first resistor R27, as well as a third capacitor C35. Pins 3 and 1 of the crystal oscillator Y1 are respectively connected to pins 43 and 44 of the second Bluetooth chip 211. One end of the first capacitor C21 is connected to pin 3 of the crystal oscillator Y1, and the other end is connected to pins 2 and 4 of the crystal oscillator Y1, one end of the first resistor R27, and one end of the second capacitor C20. The other end of the second capacitor C20 is connected to pin 1 of the crystal oscillator Y1. The other end of the first resistor R27 is grounded. One end of the third capacitor C35 is connected to pin 1 of the crystal oscillator Y1, and the other end is connected to pin 44 of the third Bluetooth chip 214.

[0069] The design principle is to provide a stable and synchronized clock signal for the second Bluetooth chip 211 and the third Bluetooth chip 214 in the wireless Bluetooth microphone system, ensuring the accuracy and efficiency of their collaborative operation. In the system, the second Bluetooth chip 211 and the third Bluetooth chip 214 need to work closely together to process audio signals from multiple transmitters 1, requiring a high degree of consistency in their operating rhythm. Using a second crystal oscillator module 212 to provide clock signals for both chips simultaneously avoids clock skew issues caused by using multiple crystal oscillator modules. Clock input is provided to the second Bluetooth chip 211 by connecting pins 3 and 1 of crystal oscillator Y1 to pins 43 and 44 of the second Bluetooth chip 211, respectively. Simultaneously, a third capacitor C35 introduces the crystal oscillator Y1 signal into pin 44 of the third Bluetooth chip 214, allowing the third Bluetooth chip 214 to also obtain a clock signal from the same source as the second Bluetooth chip 211. The configuration of the first capacitor C21, the second capacitor C20, and the first resistor R27 is similar to that of the traditional crystal oscillator Y1 circuit. It is used to adjust the load capacitance of the crystal oscillator Y1 and stabilize the oscillation state, so as to ensure that the output clock signal frequency is accurate and the waveform is stable.

[0070] After the system starts up, the second crystal oscillator module 212 begins to operate. Crystal oscillator Y1 generates an oscillation signal at a specific frequency under power supply excitation. This signal is transmitted through pins 3 and 1 of crystal oscillator Y1 to pins 43 and 44 of the second Bluetooth chip 211, providing a clock reference for the second Bluetooth chip 211. This allows the various circuits inside the second Bluetooth chip 211 to operate at a precise rhythm, completing operations such as receiving, processing, and integrating audio signals. Simultaneously, the third capacitor C35 couples the crystal oscillator Y1 signal to pin 44 of the third Bluetooth chip 214, providing a clock signal for the third Bluetooth chip 214. The third Bluetooth chip 214 synchronizes its operating rhythm according to this clock signal, maintaining consistency with the second Bluetooth chip 211. During this process, the first capacitor C21, the second capacitor C20, and the first resistor R27 work together to adjust the load capacitance of crystal oscillator Y1, stabilizing the oscillation state and ensuring that the output clock signal is not affected by external interference, remaining stable and accurate at all times. This ensures that the second Bluetooth chip 211 and the third Bluetooth chip 214 can work stably and efficiently together.

[0071] This design achieves several significant technical benefits. Regarding clock synchronization, a second crystal oscillator module 212 provides a consistent clock signal to both the second Bluetooth chip 211 and the third Bluetooth chip 214, effectively eliminating clock deviations and ensuring precise synchronization. This allows the second Bluetooth chip 211 and the third Bluetooth chip 214 to maintain a high degree of consistency when processing audio signals, avoiding audio signal processing errors or data loss caused by clock asynchrony, and improving the overall audio processing quality of the system. In terms of circuit complexity and cost, using a single crystal oscillator module to provide clock signals to both Bluetooth chips reduces the number of crystal oscillator modules used in the system, lowering circuit complexity and cost. This not only simplifies hardware design but also improves system reliability and maintainability. Furthermore, due to the guaranteed stability and reliability of the crystal oscillator module, the second Bluetooth chip 211 and the third Bluetooth chip 214 can operate under a stable clock signal, reducing faults and errors caused by clock instability and improving the overall stability and reliability of the wireless Bluetooth microphone system.

[0072] See Figure 5 , Figures 9 to 10 As shown, in one specific embodiment, the second Bluetooth control unit 21 further includes a power supply control module 215; the power supply control module 215 is provided with an input terminal, a control terminal and an output terminal; the input terminal is connected to the second power supply module 213; the control terminal is connected to the second Bluetooth chip 211; and the output terminal is connected to the third Bluetooth chip 214.

[0073] Specifically, the design principle revolves around optimizing the power supply management of the third Bluetooth chip 214 in a wireless Bluetooth microphone system. In the system, the second Bluetooth chip 211 and the third Bluetooth chip 214 work together to process audio signals, but in some situations, the third Bluetooth chip 214 may not always be operating at full load. The power supply control module 215 allows for flexible control of the power supply to the third Bluetooth chip 214 according to the actual needs of the system. By connecting the input terminal of the power supply control module 215 to the second power supply module 213, a stable power input is ensured. The control terminal is connected to the second Bluetooth chip 211, allowing the second Bluetooth chip 211 to send control signals to the power supply control module 215 based on its own operating status and system requirements. The output terminal is connected to the third Bluetooth chip 214, enabling precise control of the power supply to the third Bluetooth chip 214, thereby reducing power consumption, extending device battery life, and improving system stability.

[0074] When the wireless Bluetooth microphone system is started, the second power supply module 213 provides power to the power supply control module 215. Initially, the power supply control module 215 determines whether to supply power to the third Bluetooth chip 214 based on preset parameters or the initial signal emitted by the second Bluetooth chip 211. During system operation, the second Bluetooth chip 211 monitors the system's operating status in real time, such as whether new audio signals need processing and the current audio processing workload. When it detects that the third Bluetooth chip 214 does not need to operate at full power or is temporarily not needed, the second Bluetooth chip 211 sends a corresponding control signal to the power supply control module 215 via its control terminal. Upon receiving the signal, the power supply control module 215 adjusts the power supply status at its output terminal, potentially reducing the output voltage, decreasing the supply current, or completely cutting off power to the third Bluetooth chip 214. Conversely, when it detects that the third Bluetooth chip 214 needs to resume operation or increase its operating power, the second Bluetooth chip 211 sends an enable signal to the power supply control module 215, which then restores or increases power to the third Bluetooth chip 214 to meet its operational needs.

[0075] This design achieves several significant technical benefits. In terms of power management, the flexible control of the power supply to the third Bluetooth chip 214 via the power supply control module 215 effectively reduces the overall power consumption of the system. When the third Bluetooth chip 214 is not needed, the power supply is promptly cut off, avoiding unnecessary energy consumption and extending the device's battery life, especially when using battery power. Regarding system stability, precise power supply control prevents the third Bluetooth chip 214 from malfunctioning due to unstable power supply. For example, reducing the supply voltage under low load reduces chip heating, lowering the probability of performance degradation and failure due to overheating. Furthermore, this power supply control method enhances the system's intelligence, enabling it to automatically adjust the power supply strategy according to actual working needs, thus improving the performance and reliability of the entire wireless Bluetooth microphone system.

[0076] See Figures 9 to 10 As shown, in one specific embodiment, the power supply control module 215 includes a first power supply control component 2151 and / or a second power supply control component 2152; the input terminal, control terminal and output terminal of the first power supply control component 2151 are respectively connected to the battery power supply component 2131, the second Bluetooth chip 211 and the third Bluetooth chip 214; the input terminal, control terminal and output terminal of the second power supply control component 2152 are respectively connected to the USB power supply component 2132, the second Bluetooth chip 211 and the third Bluetooth chip 214.

[0077] Specifically, the core principle of this design is to achieve flexible management and intelligent control of the power supply to the third Bluetooth chip 214 to adapt to different power supply scenarios. The system can employ two different power supply methods: a battery-powered component 2131 and / or a USB-powered component 2132. Each power supply method has its own characteristics and applicable scenarios. The battery-powered component 2131 provides device mobility, enabling the device to operate without an external power source; while the USB-powered component 2132 provides stable power when an external power source is available and may also have a charging function. By setting up a first power supply control component 2151 and a second power supply control component 2152, corresponding to battery power and USB power respectively, the power supply to the third Bluetooth chip 214 can be precisely controlled according to the actual power supply situation and system requirements. The second Bluetooth chip 211, as the control core, can send control signals to the power supply control components based on factors such as the device's operating status and battery level, thereby optimizing power usage and improving system reliability and energy efficiency.

[0078] When the system starts running, it activates the corresponding power supply control components based on the current power supply status. If the battery-powered component 2131 is used, the input terminal of the first power supply control component 2151 is connected to the battery-powered component 2131 to obtain power. The second Bluetooth chip 211 monitors various system states in real time, such as whether the third Bluetooth chip 214 needs to work and whether the battery power is sufficient. When it determines that power needs to be supplied to the third Bluetooth chip 214, the second Bluetooth chip 211 sends an enable signal to the first power supply control component 2151 through its control terminal. After receiving the signal, the first power supply control component 2151 supplies battery power to the third Bluetooth chip 214 through its output terminal, enabling it to start working. When the third Bluetooth chip 214 does not need to work, the second Bluetooth chip 211 sends a shutdown signal, and the first power supply control component 2151 stops supplying power to the third Bluetooth chip 214 to conserve battery power.

[0079] If the USB power supply component 2132 is used, the input terminal of the second power supply control component 2152 is connected to the USB power supply component 2132 to obtain power. The third Bluetooth chip 214 can also send control signals to the second power supply control component 2152 through its control terminal according to its own operating needs. When the third Bluetooth chip 214 needs power, it sends an enable signal, and the second power supply control component 2152 supplies power from the USB power supply component 2132 to the third Bluetooth chip 214; when it does not need power, it sends an disable signal to stop supplying power.

[0080] This design achieves several significant technical benefits. In terms of power management, flexible control of the two power supply methods allows for rational power allocation based on actual conditions, improving power efficiency and extending battery life. When a USB power source is available, priority is given to USB power, which also charges the battery, ensuring continuous device operation. Regarding system stability, the second Bluetooth chip 211 and the third Bluetooth chip 214 can precisely control power supply according to system status, avoiding chip failures caused by unstable or unnecessary power supply, thus improving the reliability of the third Bluetooth chip 214. Furthermore, this design enhances the device's compatibility and adaptability, ensuring normal operation whether using battery power in mobile scenarios or USB power in stationary scenarios.

[0081] See Figure 9As shown, more specifically, the first power supply control component 2151 includes a second resistor R21, a third resistor R22, a fourth resistor R23, a fifth resistor R26, a fourth capacitor C26, a first MOSFET QC2, and a first transistor QP8; one end of the second resistor R21 is connected to the battery power supply component 2131, and the other end is connected to pin 19 of the third Bluetooth chip 214; the source of the first MOSFET QC2 is connected to the battery power supply component 2131, the drain is connected to pin 19 of the third Bluetooth chip 214, and the gate is connected to the first transistor QP8. The collector of QP8; one end of the third resistor R22 is connected to the battery power supply component 2131, and the other end is connected to the gate of the first MOSFET QC2 and the collector of the first transistor QP8; the emitter of the first transistor QP8 is grounded, and the base is connected to one end of the fourth resistor R23 and one end of the fifth resistor R26; the other end of the fourth resistor R23 is connected to pin 3 of the second Bluetooth chip 211; the other end of the fifth resistor R26 is grounded; one end of the fourth capacitor C26 is connected to pin 19 of the third Bluetooth chip 214, and the other end is grounded.

[0082] Furthermore, the design principle of the first power supply control component 2151 is to construct a flexible and reliable power control circuit to achieve precise management of the power supply to the third Bluetooth chip 214. A battery power supply component 2131 provides power to the system. Through a circuit composed of a series of resistors, capacitors, MOSFETs, and transistors, the control signal from the second Bluetooth chip 211 is used to determine whether to supply power to the third Bluetooth chip 214. The second resistor R21 acts as a current limiter, protecting the third Bluetooth chip 214 from excessive current surges while providing it with a stable power input. The first MOSFET QC2 acts as a power switch, capable of quickly responding to control signals and controlling the on / off state of the power supply to the third Bluetooth chip 214. The first transistor QP8 amplifies the weak control signal output by the second Bluetooth chip 211 to drive the first MOSFET QC2 to turn on and off. The third resistor R22 provides a bias voltage to the gate of the first MOSFET QC2, ensuring it operates under appropriate conditions. The fourth resistor R23 and the fifth resistor R26 form a voltage divider circuit to divide the control signal output by the second Bluetooth chip 211, ensuring that the signal input to the base of the first transistor QP8 meets its operating requirements. The fourth capacitor C26 acts as a filter, smoothing the power supply voltage, reducing the impact of power supply ripple on the third Bluetooth chip 214, and ensuring the stability of the chip's operation.

[0083] The process of using the battery power supply component 2131 to power the second Bluetooth chip 211 and the third Bluetooth chip 214 is as follows: Initially, if pin 3 of the second Bluetooth chip 211 outputs a low-level signal, after voltage division by the fourth resistor R23 and the fifth resistor R26, the voltage obtained at the base of the first transistor QP8 is insufficient to turn it on. At this time, the first transistor QP8 is in the off state, and the gate of the first MOSFET QC2 is connected to the battery power supply component 2131 through the third resistor R22, obtaining a high level, and the first MOSFET QC2 turns on. The power supply component 2131 supplies power to pin 19 of the third Bluetooth chip 214 through the first MOSFET QC2 and the second resistor R21, and the third Bluetooth chip 214 begins to work normally. During this process, the fourth capacitor C26 filters the power supply to ensure its stability. When the second Bluetooth chip 211 detects that the system is in a low-power state or that the third Bluetooth chip 214 does not need to work, its pin 3 outputs a high-level signal. After being divided, the signal provides sufficient voltage to the base of the first transistor QP8, causing it to conduct. As the collector potential of the first transistor QP8 decreases, the gate potential of the first MOSFET QC2 also decreases, causing the first MOSFET QC2 to turn off. This cuts off the power supply to pin 19 of the third Bluetooth chip 214, thereby reducing power consumption.

[0084] This design achieves several significant technical benefits. In terms of power management, the precise control of the power supply to the third Bluetooth chip 214 by the second Bluetooth chip 211 allows for timely cutting off or restoration of power according to actual system needs, effectively reducing overall system power consumption and extending battery life, making it particularly suitable for battery-powered wireless Bluetooth devices. Regarding circuit stability, the current-limiting effect of the second resistor R21 and the filtering effect of the fourth capacitor C26 ensure stable power input to the third Bluetooth chip 214, reducing the impact of power fluctuations and ripple on the chip, improving chip reliability, and lowering the probability of failure due to power supply issues. Furthermore, this circuit structure is relatively simple, low-cost, and easy to integrate into the entire wireless Bluetooth system, exhibiting good practicality and scalability.

[0085] See Figure 10As shown, more specifically, the second power supply control component 2152 includes a sixth resistor R14, a seventh resistor R26, an eighth resistor R29, a ninth resistor R30, a fifth capacitor C16, a second MOSFET QC1, and a second transistor QP1; one end of the sixth resistor R14 is connected to the USB power supply component 2132, and the other end is connected to pin 19 of the third Bluetooth chip 214; the source of the second MOSFET QC1 is connected to the USB power supply component 2132, the drain is connected to pin 19 of the third Bluetooth chip 214, and the gate is connected to the collector of the second transistor QP1; the... One end of resistor R26 is connected to the USB power supply component 2132, and the other end is connected to the gate of the second MOSFET QC1 and the collector of the second transistor QP1; the emitter of the second transistor QP1 is grounded, and the base is connected to one end of the eighth resistor R29 and one end of the ninth resistor R30; the other end of the eighth resistor R29 is in NC state, or connected to pin 30 of the second Bluetooth chip 211 through a resistor with no resistance RS9; the other end of the ninth resistor R30 is grounded; one end of capacitor C16 is connected to pin 20 of the third Bluetooth chip 214, and the other end is grounded.

[0086] Furthermore, the design principle of the second power supply control component 2152 revolves around achieving precise control of the power supply to the third Bluetooth chip 214 by the USB power supply component 2132. The sixth resistor R14 acts as a current-limiting resistor, protecting the third Bluetooth chip 214 from excessive current surges while providing a stable power input. The second MOSFET QC1 acts as a crucial power switch; its on / off state determines whether the third Bluetooth chip 214 receives power. By controlling the gate level of the second MOSFET QC1, the power supply to the chip can be switched on and off. The second transistor QP1 amplifies the control signal, amplifying the weak control signal from the second Bluetooth chip 211 to drive the second MOSFET QC1. The seventh resistor R26 provides a suitable bias voltage to the gate of the second MOSFET QC1, ensuring its stable operation. The eighth resistor R29 and the ninth resistor R30 form a voltage divider circuit, processing the signal input to the base of the second transistor QP1 to meet the transistor's operating requirements. The fifth capacitor, C16, acts as a filter, smoothing the power supply voltage at pin 20 of the third Bluetooth chip 214, reducing voltage ripple interference to the chip's operation, and ensuring stable chip operation. The connection method between the eighth resistor, R29, and pin 30 of the second Bluetooth chip 211 (either in NC state or connected via a valueless resistor RS9) provides flexible configuration options for power supply control, allowing the second Bluetooth chip 211 to control this power supply component according to actual needs.

[0087] The process of using the USB power supply component 2132 to power the second Bluetooth chip 211 and the third Bluetooth chip 214 is as follows: When the system is connected to the USB power supply component 2132, the USB power supply component 2132 begins to provide power to the entire second power supply control component 2152. If the eighth resistor R29 is in the NC state, the base level of the second transistor QP1 is determined only by the grounding of the ninth resistor R30, resulting in a low base level and the second transistor QP1 being in the off state. The gate of the second MOSFET QC1 is connected to the USB power supply component 2132 through the seventh resistor R26, obtaining a high level. The second MOSFET QC1 is turned on, and the power supply of the USB power supply component 2132 continuously supplies power to pin 19 of the third Bluetooth chip 214 through the second MOSFET QC1 and the sixth resistor R14, keeping the third Bluetooth chip 214 in an operational state. If the eighth resistor R29 is connected to pin 30 of the second Bluetooth chip 211 through the non-resistive resistor RS9, the second Bluetooth chip 211 can output control signals through pin 30. When the second Bluetooth chip 211 outputs a low-level signal, after voltage division by the eighth resistor R29 and the ninth resistor R30, the voltage at the base of the second transistor QP1 is insufficient to turn it on, so the second transistor QP1 is cut off, and the second MOSFET QC1 turns on, supplying power to the third Bluetooth chip 214. When the second Bluetooth chip 211 outputs a high-level signal, after voltage division, the base of the second transistor QP1 receives sufficient voltage to turn it on, reducing the collector potential of the second transistor QP1. Consequently, the gate potential of the second MOSFET QC1 also decreases, causing QC1 to turn off and cutting off the power supply to pin 19 of the third Bluetooth chip 214. During this process, the fifth capacitor C16 continuously filters the power supply to pin 20 of the third Bluetooth chip 214 to ensure power stability.

[0088] This design achieves several significant technical benefits. Regarding power supply flexibility, the configurable connection between the eighth resistor R29 and the pins of the second Bluetooth chip 211 allows the second power supply control component 2152 to operate in either a fixed power supply mode (NC state) or an intelligent power supply mode controlled by the second Bluetooth chip 211, meeting the power supply requirements of different application scenarios. In terms of circuit protection, the current-limiting effect of the sixth resistor R14 and the filtering effect of the fifth capacitor C16 effectively ensure the stable operation of the third Bluetooth chip 214 under USB power supply, reducing the risk of chip damage due to power fluctuations or abnormal currents and improving system reliability. Regarding power consumption management, when the second Bluetooth chip 211 controls the USB power supply component 2132, it can precisely control the power supply to the third Bluetooth chip 214 according to actual system needs, reducing unnecessary power consumption and improving system energy efficiency.

[0089] See Figures 6 to 8As shown, in a specific embodiment, the first Bluetooth chip 121, the second Bluetooth chip 211, and the third Bluetooth chip 214 are all ATS3031 chips.

[0090] Specifically, the selection of the ATS3031 chip as the first Bluetooth chip 121, the second Bluetooth chip 211, and the third Bluetooth chip 214 is based on multiple design considerations. From a system compatibility perspective, using the same chip ensures complete compatibility in communication protocols and data formats between the various Bluetooth chips, avoiding compatibility issues caused by chip differences, reducing signal loss and interference due to communication incompatibility, improving the stability and reliability of audio signal transmission, and ensuring clear and smooth sound. This allows them to seamlessly integrate when working together, reducing errors and interference in signal transmission and processing, and ensuring the stability and reliability of the entire wireless Bluetooth microphone system. From a development cost and difficulty perspective, using the same chip reduces the technical complexity and cost of the development process. Developers only need to be familiar with the characteristics and usage of one chip to complete the design and development of the entire system, reducing learning costs and development cycles. Simultaneously, during production, unified chip selection facilitates procurement and inventory management, reducing production costs. In addition, the ATS3031 chip may have specific functions and performance characteristics suitable for this wireless Bluetooth microphone system, such as low power consumption, high integration, and good audio processing capabilities, which can meet the system's requirements for audio signal transmission and processing.

[0091] See Figure 2 As shown, in one specific embodiment, the audio output unit 22 includes a left channel output module 221 and a right channel output module 222; both the left channel output module 221 and the right channel output module 222 are connected to the second Bluetooth chip 211.

[0092] Specifically, this design aims to achieve high-quality stereo audio output to enhance the user's listening experience. In modern audio systems, stereo technology can transmit different audio signals through the left and right channels, simulating a more realistic and richer soundscape. Dividing the audio output unit 22 into a left channel output module 221 and a right channel output module 222, and connecting them both to the second Bluetooth chip 211, is based on the second Bluetooth chip 211's role as the core processing unit in the entire wireless Bluetooth microphone system. The second Bluetooth chip 211 can process and separate the received audio signal, decomposing it into left and right channel audio data, and then transmitting them to the corresponding left channel output module 221 and right channel output module 222 respectively. The left channel output module 221 and right channel output module 222 can output independently or simultaneously. This design utilizes the advantages of stereo technology, making the audio output more spatial and layered, meeting the user's demand for high-quality audio.

[0093] See Figures 4 to 5 As shown, in one specific embodiment, the second Bluetooth chip 211 is also connected to a digital-to-analog amplifier module 216 and / or a headphone amplifier module 217.

[0094] Specifically, this design principle aims to enhance the quality and applicability of the audio signal output by the second Bluetooth chip 211 to meet diverse audio playback needs. As the core component for audio signal processing and transmission in a wireless Bluetooth microphone system, the second Bluetooth chip 211, after receiving and processing the audio signal, often outputs a low-power, low-amplitude audio signal, making it difficult to directly drive external audio playback devices. The digital-to-analog amplifier module 216 converts the digital audio signal output by the second Bluetooth chip 211 into an analog audio signal and amplifies its power, enabling the signal to drive high-power analog audio devices such as speakers. The headphone amplifier module 217 is specifically optimized for headphones, improving the driving capability of the audio signal, providing appropriate power to the headphones, and ensuring high-quality sound output. By connecting the digital-to-analog amplifier module 216 and / or the headphone amplifier module 217, the system's audio output capabilities can be expanded to adapt to different types of audio playback devices.

[0095] See Figures 4 to 5 As shown, in one specific embodiment, the first Bluetooth chip 121 and the second Bluetooth chip 211 are also connected to a push-button switch module 218 and an LED module 219.

[0096] Specifically, this design principle primarily aims to enhance user interaction with the devices containing the first Bluetooth chip 121 and the second Bluetooth chip 211, and to provide visual feedback on device status. The button switch module 218 provides users with a manual way to control the device; users can execute specific functions by pressing different buttons, such as turning the device on or off, switching working modes, and pairing Bluetooth devices. The LED module 219 serves as an intuitive status indicator, displaying the device's current operating status using different colors, flashing frequencies, or brightness levels, such as whether the device is powered on, whether Bluetooth pairing has been successful, and whether the battery is sufficient. Connecting both the button switch module 218 and the LED module 219 to the first Bluetooth chip 121 and the second Bluetooth chip 211 simultaneously allows users to easily control and understand the operating status of these two key chips, improving user experience and device usability.

[0097] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A wireless Bluetooth microphone system, characterized in that, include: The system comprises several transmitters and at least one receiver; each transmitter includes an audio input unit and a first Bluetooth control unit electrically connected to the audio input unit, with adjacent first Bluetooth control units forming a wireless connection; the receiver includes a second Bluetooth control unit and an audio output unit electrically connected to the second Bluetooth control unit; the second Bluetooth control unit is wirelessly connected to at least one first Bluetooth control unit.

2. The wireless Bluetooth microphone system according to claim 1, characterized in that, The first Bluetooth control unit includes a first Bluetooth chip, and adjacent first Bluetooth chips are wirelessly connected; the second Bluetooth control unit includes a second Bluetooth chip; the second Bluetooth chip is wirelessly connected to one or two first Bluetooth chips.

3. The wireless Bluetooth microphone system according to claim 2, characterized in that, The first Bluetooth chip is connected to a first crystal oscillator module and a first power supply module; the second Bluetooth chip is connected to a second crystal oscillator module and a second power supply module.

4. The wireless Bluetooth microphone system according to claim 3, characterized in that, The number of transmitters is four, and the number of receivers is one; the second Bluetooth control unit further includes a third Bluetooth chip; the second Bluetooth chip is wirelessly connected to one or two of the first Bluetooth chips; the third Bluetooth chip is wirelessly connected to another one or two of the first Bluetooth chips; the third Bluetooth chip is also connected to the second Bluetooth chip.

5. The wireless Bluetooth microphone system according to claim 4, characterized in that, The second Bluetooth chip and the third Bluetooth chip are connected via a synchronous serial communication interface.

6. The wireless Bluetooth microphone system according to claim 4, characterized in that, Both the second Bluetooth chip and the third Bluetooth chip are connected to the second crystal oscillator module.

7. The wireless Bluetooth microphone system according to claim 4, characterized in that, The second Bluetooth control unit further includes a power supply control module; the power supply control module has an input terminal, a control terminal and an output terminal; the input terminal is connected to the second power supply module; the control terminal is connected to the second Bluetooth chip; and the output terminal is connected to the third Bluetooth chip.

8. The wireless Bluetooth microphone system according to claim 4, characterized in that, The first Bluetooth chip, the second Bluetooth chip, and the third Bluetooth chip are all ATS3031 chips.

9. The wireless Bluetooth microphone system according to claim 2, characterized in that, The audio output unit includes a left channel output module and a right channel output module; both the left channel output module and the right channel output module are connected to the second Bluetooth chip.

10. The wireless Bluetooth microphone system according to claim 9, characterized in that, The second Bluetooth chip is also connected to a digital-to-analog amplifier module and / or a headphone amplifier module.

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