Headphone amplifier circuits and electronic devices that support wireless starlight

Abstract

This application relates to the field of electronic circuit technology, and more particularly to a headphone amplifier circuit and electronic device supporting wireless star-flash communication. The headphone amplifier circuit includes a wireless star-flash transceiver unit, a USB audio bridge unit, an audio DAC unit, a high-fidelity headphone amplifier unit, a headphone jack, and a power supply system. The wireless star-flash transceiver unit is electrically connected to the USB audio bridge unit, which is electrically connected to both the audio DAC unit and the headphone jack. The output of the audio DAC unit is electrically connected to the high-fidelity headphone amplifier unit, and the output of the high-fidelity headphone amplifier unit is electrically connected to the headphone jack. The wireless star-flash transceiver unit is used for receiving and transmitting signals using star-flash communication. The USB audio bridge unit is used for receiving audio signals transmitted by the wireless star-flash transceiver unit. Using the headphone amplifier circuit provided in this application, and employing the wireless star-flash transceiver unit, long-distance, high-fidelity audio signal transmission is achieved, improving the transmission quality of audio information and the user experience.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuit technology, and in particular to a headphone amplifier circuit and electronic device that supports wireless star flash. Background Technology

[0002] Most headphones on the market today are Universal Serial Bus (USB) headphones, wireless Bluetooth headphones, wireless Bluetooth headphones, and wired USB headphones. Wired USB headphones must be connected to the audio source device via a physical cable, which often limits portability due to tangled cables. Wireless Bluetooth headphone amplifiers are limited by transmission bandwidth (<1Mbps) and cannot meet the requirements for 192kHz / 24bit lossless audio transmission. The 2.4GHz band is susceptible to interference from devices such as Wi-Fi, and the signal is easily affected by electromagnetic interference (such as in subways and densely populated areas), with a packet loss rate as high as 15%-20% within an effective distance of 10 meters. The inherent transmission delay of more than 40ms leads to audio-visual desynchronization, significant sound quality loss, and overall audio quality degradation, making it difficult to achieve stable transmission of high-fidelity audio data. Utility Model Content

[0003] This application provides a headphone amplifier circuit and electronic device that supports wireless starlight to solve the technical problem in the related art that high-fidelity sound quality cannot be transmitted when wireless Bluetooth headphones transmit audio.

[0004] In a first aspect, this application provides a headphone amplifier circuit that supports wireless starlight, the headphone amplifier circuit including: a wireless starlight transceiver unit, a USB audio bridge unit, an audio DAC unit, a high-fidelity headphone amplifier unit, a headphone jack, and a power system;

[0005] The wireless star-flash transceiver unit is electrically connected to the USB audio bridge unit. The USB audio bridge unit is electrically connected to the audio DAC unit and the headphone jack respectively. The output terminal of the audio DAC unit is electrically connected to the high-fidelity headphone amplifier unit. The output terminal of the high-fidelity headphone amplifier unit is electrically connected to the headphone jack.

[0006] The wireless star-flash transceiver unit is used to receive and transmit signals using star-flash communication; the USB audio bridge unit is used to receive audio signals transmitted by the wireless star-flash transceiver unit and control the wireless star-flash transceiver unit to switch between transmission and reception; the audio DAC unit is used to receive digital audio signals transmitted by the USB audio bridge unit and decode them into analog audio signals; the high-fidelity headphone amplifier unit is used to amplify the analog audio signals transmitted by the audio DAC unit in a high-fidelity manner and output the amplified audio signals to the headphone jack.

[0007] The output terminals of the power system are electrically connected to the wireless star-flash transceiver unit, the USB audio bridge unit, the audio DAC unit, and the high-fidelity headphone amplifier unit, respectively, to supply power to the wireless star-flash transceiver unit, the USB audio bridge unit, the audio DAC unit, and the high-fidelity headphone amplifier unit.

[0008] In one possible design, the headphone amplifier circuit further includes a USB interface electrically connected to the USB audio bridge unit; the USB interface is used to receive audio signals and supply power to the power system.

[0009] In one possible design, the power system includes a battery charging management unit and a power supply switching unit;

[0010] The output of the USB interface is electrically connected to the battery charging management unit and the power supply switching unit, respectively. The battery charging management unit is also electrically connected to the power supply switching unit. The power supply switching unit is used to switch between power supply to the electronic device and power supply to the battery.

[0011] In one possible design, the power supply switching unit is used to identify whether an electronic device is connected to the USB interface. When an electronic device is connected to the USB interface, the unit controls the electronic device to supply power. When no electronic device is connected to the USB interface, the unit controls the battery charging management unit to supply power.

[0012] In one possible design, the battery charging management unit includes a battery management module and an energy storage battery, wherein the battery management module is used to manage the charging and discharging of the energy storage battery.

[0013] In one possible design, the USB audio bridging unit is one of the following chips: CT7601, SPV5048, SA9312, and XU316.

[0014] In one possible design, the wireless transceiver unit is one of the following chips: SLE05V100, Hi3853, TR5312, and AiW9651.

[0015] In one possible design, the audio DAC unit is one of the CS43131 chip, the ES9039 chip, and the AK4493 chip; the high-fidelity headphone amplifier unit is one of the SGM8262 chip, the OP1622 chip, and the RT686 chip.

[0016] In one possible design, the battery management module is one of the following chips: TP4054, ME4075, and TMI4054.

[0017] Secondly, this application provides an electronic device, which includes a headphone amplifier circuit supporting wireless star flash as described in any of the preceding claims.

[0018] The headphone amplifier circuit and electronic device supporting wireless starlight communication provided in the first aspect above include a wireless starlight transceiver unit, a USB audio bridge unit, an audio DAC unit, a high-fidelity headphone amplifier unit, a headphone jack, and a power supply system. The wireless starlight transceiver unit is electrically connected to the USB audio bridge unit, which is electrically connected to both the audio DAC unit and the headphone jack. The output of the audio DAC unit is electrically connected to the high-fidelity headphone amplifier unit, and the output of the high-fidelity headphone amplifier unit is electrically connected to the headphone jack. The wireless starlight transceiver unit is used for receiving and transmitting signals using starlight communication. The USB audio bridge unit is used for receiving audio signals transmitted by the wireless starlight transceiver unit and controlling the wireless starlight transceiver unit to switch between transmission and reception. The audio DAC unit is used for receiving digital audio signals transmitted by the USB audio bridge unit and decoding them into analog audio signals. The high-fidelity headphone amplifier unit is used for high-fidelity amplification of the analog audio signals transmitted by the audio DAC unit and outputting the amplified audio signals to the headphone jack. The headphone amplifier circuit provided in this application uses a wireless star-flash transceiver unit to achieve long-distance, high-fidelity audio signal transmission, thereby improving the transmission quality of audio information and user experience.

[0019] The beneficial effects provided in the second aspect and its various possible designs can be found in the first aspect and its various possible implementations, and will not be repeated here. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the headphone amplifier circuit structure provided in an embodiment of this application;

[0021] Figure 2 This is one of the application scenario diagrams of the headphone amplifier circuit provided in the embodiments of this application;

[0022] Figure 3 This is a second schematic diagram illustrating an application scenario of the headphone amplifier circuit provided in this application embodiment. Detailed Implementation

[0023] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c alone can mean: a alone, b alone, c alone, a combination of a and b, a combination of a and c, a combination of b and c, or a, b, and c, where a, b, and c can be single or multiple. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] The terms “center,” “longitudinal,” “lateral,” “up,” “down,” “left,” “right,” “front,” and “rear,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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.

[0025] The terms "connected" and "connected" should be interpreted broadly. For example, in circuit structures, "connected" or "connected" can refer not only to physical connections but also to electrical or signal connections. This could be a direct connection (physical connection) or an indirect connection via at least one intermediate component, as long as the circuit is connected. It could also refer to the internal connection between two components. Similarly, a signal connection can refer to a connection via a circuit or a medium, such as radio waves. Those skilled in the art will understand the specific meaning of these terms in this application based on the specific circumstances.

[0026] Among related technologies, traditional decoding headphone amplifiers have three major technical pain points: First, although wired USB decoding headphone amplifiers can guarantee sound quality, the constraints of the cable lead to poor portability, and they are dependent on the device's power supply; Second, wireless Bluetooth headphone amplifiers are limited by transmission bandwidth (generally less than 1Mbps), transmission latency (greater than 40ms), and transmission distance (less than 10m), which cannot meet the requirements of high-resolution and high-fidelity audio transmission; Third, dual-mode decoding headphone amplifiers with both wireless Bluetooth and wired USB solve the portability problem, but when working in wireless Bluetooth mode, the transmission bandwidth, transmission latency, and transmission distance issues mentioned in point 2 above still exist.

[0027] To overcome the shortcomings of the aforementioned related technologies, this utility model adopts a combination of wireless star flash and wired USB digital audio decoding to achieve dual-mode lossless transmission. The star flash wireless transmission bandwidth is ≥12Mbps, latency is ≤14ms, and transmission distance is ≥30m. The wired transmission supports up to 768kHz / 32bit, thus achieving a unity of dual-mode high-fidelity sound quality, stable long-distance wireless transmission, and mobile convenience. To achieve this technical effect, the headphone amplifier circuit provided in this application includes a wireless star-flash transceiver unit, a USB audio bridge unit, an audio DAC unit, a high-fidelity headphone amplifier unit, a headphone jack, and a power supply system. The wireless star-flash transceiver unit is electrically connected to the USB audio bridge unit, which is electrically connected to both the audio DAC (Digital-to-Analog Converter) unit and the headphone jack. The output of the audio DAC unit is electrically connected to the high-fidelity headphone amplifier unit, and the output of the high-fidelity headphone amplifier unit is electrically connected to the headphone jack. The wireless star-flash transceiver unit is used for receiving and transmitting signals using star-flash communication. The USB audio bridge unit is used for receiving audio signals transmitted by the wireless star-flash transceiver unit and controlling the wireless star-flash transceiver unit to switch between transmission and reception. The audio DAC unit is used for receiving digital audio signals transmitted by the USB audio bridge unit and decoding them into analog audio signals. The high-fidelity headphone amplifier unit is used for high-fidelity amplification of the analog audio signals transmitted by the audio DAC unit and outputting the amplified audio signals to the headphone jack.

[0028] Figure 1 The schematic diagram of the headphone amplifier circuit provided in the embodiment of this application includes: a wireless flash transceiver unit 11, a USB audio bridge unit 12, an audio DAC unit 13, a high-fidelity headphone amplifier unit 14, a headphone jack 15, and a power system.

[0029] The wireless star-flash transceiver unit 11 is electrically connected to the USB audio bridge unit 12. The USB audio bridge unit 12 is electrically connected to the audio DAC unit 13 and the headphone jack 15. The output of the audio DAC unit 13 is electrically connected to the high-fidelity headphone amplifier unit 14, and the output of the high-fidelity headphone amplifier unit 14 is electrically connected to the headphone jack 15. The wireless star-flash transceiver unit 11 is used for receiving and transmitting signals using star-flash communication. The USB audio bridge unit 12 is used for receiving audio signals transmitted by the wireless star-flash transceiver unit 11 and controlling the wireless star-flash transceiver unit 11 to switch between transmission and reception. Unit C 13 is used to receive digital audio signals sent by USB audio bridging unit 12 and decode them into analog audio signals; high-fidelity headphone amplifier unit 14 is used to amplify the analog audio signals sent by audio DAC unit 13 in a high-fidelity manner and output the amplified audio signals to headphone jack 15; the output of the power system is electrically connected to wireless flash transceiver unit 11, USB audio bridging unit 12, audio DAC unit 13 and high-fidelity headphone amplifier unit 14 respectively to supply power to wireless flash transceiver unit 11, USB audio bridging unit 12, audio DAC unit 13 and high-fidelity headphone amplifier unit 14.

[0030] In one embodiment of this application, the headphone amplifier circuit further includes a USB interface 16, which is electrically connected to the USB audio bridge unit 12. The USB interface 16 is used to receive audio signals and supply power to the power system. It is understood that the USB interface 16 can be connected to an electronic device (such as a mobile phone) to receive audio signals output by the electronic device and transmit the audio signals to the USB audio bridge unit 12 via USB 2.0 technology; simultaneously, the USB interface 16 connects to an electronic device to supply power to the headphone amplifier circuit.

[0031] In one embodiment of this application, please continue to refer to Figure 1 As shown, the power system includes a battery charging management unit 17 and a power supply switching unit 18; the output of the USB interface 16 is electrically connected to the battery charging management unit 17 and the power supply switching unit 18 respectively, and the battery charging management unit 17 is also electrically connected to the power supply switching unit 18; the power supply switching unit 18 is used to switch between power supply to the electronic device and power supply to the battery.

[0032] In one embodiment of this application, the power supply switching unit 18 is used to identify whether an electronic device is connected to the USB interface 16. When an electronic device is connected to the USB interface, the electronic device is controlled to supply power to the circuit system. When no electronic device is connected to the USB interface, the energy storage battery in the battery charging management unit 17 is controlled to supply power.

[0033] In one embodiment of this application, the battery charging management unit 17 includes a battery management module and an energy storage battery. The battery management module is used to manage the charging and discharging of the energy storage battery. The battery management module is also called a battery management system (BMS). The battery management system is the link between the battery and the user, and is mainly responsible for monitoring, controlling and managing various performance aspects of the battery to ensure the safe, stable and long-life operation of the battery.

[0034] In one embodiment of this application, the USB audio bridging unit 12 may be one of the following chips: CT7601, SPV5048, SA9312, and XU316.

[0035] In one embodiment of this application, the wireless star-flash transceiver unit 11 may be one of the following chips: SLE05V100, Hi3853, TR5312, and AiW9651.

[0036] In one embodiment of this application, the audio DAC unit 13 may be one of the CS43131 chip, the ES9039 chip, and the AK4493 chip.

[0037] In one embodiment of this application, the high-fidelity headphone amplifier unit 14 may be one of the following chips: SGM8262, OP1622, and RT686.

[0038] In one embodiment of this application, the battery management module may employ one of the following chips: TP4054, ME4075, and TMI4054.

[0039] In one embodiment of this application, the energy storage battery may be a lithium battery.

[0040] In one embodiment of this application, the power supply switching unit 18 can be a logic circuit built from discrete devices such as MOSFETs to realize the switching and control of the power supply path.

[0041] In one application scenario, the USB interface 16 can connect to mobile smart terminals such as mobile phones and tablets, while the headphone jack 15 connects to headphones. The USB audio bridging unit 12 is responsible for receiving the StarSignal I2S signal sent by the wireless StarSignal transceiver unit 11, and controls the StarSignal transceiver unit 11 via I2C. The USB audio bridging unit 12 is also responsible for receiving and transmitting USB 2.0 signals, receiving audio signals transmitted via USB 2.0 signals or audio signals from the StarSignal I2S signals, performing analog-to-digital conversion on the audio signals, and then transmitting them to the audio DAC unit 13. The USB audio bridging unit 12 simultaneously receives microphone signals from the headphone jack 15, encodes the microphone signals into USB digital audio signals, connects them to the wired USB interface 16, and transmits them to the electronic device. The audio DAC unit 13 is responsible for receiving the digital audio signals converted from analog to digital by the USB audio bridging unit 12, decoding them into analog audio signals HPL and HPR, and outputting them to the high-fidelity headphone amplifier unit 14. The high-fidelity headphone amplifier unit 14 is responsible for amplifying the analog signal decoded by the audio DAC unit 13 with high fidelity, and outputting the amplified analog audio signals HPL and HPR left and right channel stereo audio to the headphone jack 15. The power supply switching unit 18 is responsible for automatically switching between battery or electronic device power supply, identifying the presence of a wired USB power supply device, and switching the battery charging management unit 17 to power the system in wireless mode.

[0042] In this embodiment, the headphone amplifier circuit can be applied to a headphone adapter, or the headphone amplifier circuit can be applied to an audio receiving device.

[0043] Figure 2 This is one of the application scenario diagrams of the headphone amplifier circuit provided in the embodiments of this application. Please refer to [the relevant documentation]. Figure 2 As shown, in one application scenario, electronic device 19 communicates with wireless transceiver unit 11 at close range via StarFlash communication technology. It is understood that some mobile phones on the market currently support StarFlash communication technology. These phones have built-in wireless transceiver modules, which can achieve short-range wireless communication with wireless transceiver unit 11 using StarFlash technology, in order to transmit audio signals from electronic device 19 to wireless transceiver unit 11.

[0044] Among them, the wireless Spark transceiver unit 11 can integrate one or more of the following communication protocols: SLE (SparkLink Low Energy), SLB (SparkLink Basic), SLZ (SparkLink Passive Internet of Things), and SLP (SparkLink Positioning) to achieve functions such as low latency, high reliability, multi-device connectivity, and anti-interference.

[0045] Figure 3This is the second schematic diagram illustrating an application scenario of the headphone amplifier circuit provided in this application embodiment. Please refer to [the relevant documentation / reference]. Figure 3 As shown, in one application scenario, taking the headphone amplifier circuit as an example in a headphone adapter, the USB interface 16 can be a USB Type-C interface. This USB Type-C interface is connected to the USB Type-C interface on an electronic device (such as a mobile phone) and then receives the audio signal output by the electronic device 19. Specifically, the USB interface 16 communicates with the USB 2.0 technology and the USB audio bridge unit 12 to transmit the audio signal received from the electronic device to the USB audio bridge unit 12.

[0046] In this embodiment, the headphone jack 15 can be a 3.5mm headphone jack, a 4.4mm headphone jack, or a USB Type-C headphone jack, etc., and users can connect headphones through the 3.5mm headphone jack.

[0047] In one embodiment, the headphone amplifier circuit provided in this embodiment can be used in headphones or wireless headphones. In this case, the wireless transceiver unit 11 can communicate wirelessly with electronic devices (such as mobile phones) to receive audio signals; the headphone interface 15 can be connected to a voice playback unit (also called a speaker) to play the received audio signals.

[0048] Compared with related technologies, the headphone amplifier circuit provided in this embodiment has the following main advantages:

[0049] 1. The digital audio codec chip has good compatibility and can use more different audio codec chips.

[0050] 2. Supports 768kHz / 32bit, improving music fidelity.

[0051] 3. High integration and low cost. It integrates multiple audio processing algorithms and supports switching between two connection modes.

[0052] 4. Wireless Star Flash optimizes latency, meeting the needs of real-time audio processing.

[0053] 5. Long transmission distance, capable of supporting transmission distances of ≥30m.

[0054] 6. It is convenient and has a long battery life.

[0055] This application also provides an electronic device, which includes a headphone amplifier circuit supporting wireless star flash as provided in any of the above embodiments. The electronic device can be a mobile phone, tablet circuit, etc.

[0056] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A headphone amplifier circuit supporting wireless starlight flash, characterized in that, The headphone amplifier circuit includes: a wireless flash transceiver unit, a USB audio bridge unit, an audio DAC unit, a high-fidelity headphone amplifier unit, a headphone jack, and a power supply system; The wireless star-flash transceiver unit is electrically connected to the USB audio bridge unit. The USB audio bridge unit is electrically connected to the audio DAC unit and the headphone jack respectively. The output terminal of the audio DAC unit is electrically connected to the high-fidelity headphone amplifier unit. The output terminal of the high-fidelity headphone amplifier unit is electrically connected to the headphone jack. The wireless star-flash transceiver unit is used to receive and transmit signals using star-flash communication; the USB audio bridge unit is used to receive audio signals transmitted by the wireless star-flash transceiver unit and control the wireless star-flash transceiver unit to switch between transmission and reception; the audio DAC unit is used to receive digital audio signals transmitted by the USB audio bridge unit and decode them into analog audio signals; the high-fidelity headphone amplifier unit is used to amplify the analog audio signals transmitted by the audio DAC unit in a high-fidelity manner and output the amplified audio signals to the headphone jack. The output terminals of the power system are electrically connected to the wireless star-flash transceiver unit, the USB audio bridge unit, the audio DAC unit, and the high-fidelity headphone amplifier unit, respectively, to supply power to the wireless star-flash transceiver unit, the USB audio bridge unit, the audio DAC unit, and the high-fidelity headphone amplifier unit.

2. The earphone circuit supporting wireless star flashing according to claim 1, wherein, The headphone amplifier circuit also includes a USB interface, which is electrically connected to the USB audio bridge unit; the USB interface is used to receive audio signals and supply power to the power system.

3. The earphone circuit supporting wireless star flashing according to claim 2, wherein, The power system includes a battery charging management unit and a power supply switching unit; The output of the USB interface is electrically connected to the battery charging management unit and the power supply switching unit, respectively. The battery charging management unit is also electrically connected to the power supply switching unit. The power supply switching unit is used to switch between power supply to the electronic device and power supply to the battery.

4. The earphone circuit supporting wireless star flashing according to claim 3, wherein, The power supply switching unit is used to identify whether an electronic device is connected to the USB interface. When an electronic device is connected to the USB interface, the unit controls the electronic device to supply power. When no electronic device is connected to the USB interface, the unit controls the battery charging management unit to supply power.

5. The earphone circuit supporting wireless star flashing according to claim 3, wherein, The battery charging management unit includes a battery management module and an energy storage battery. The battery management module is used to manage the charging and discharging of the energy storage battery.

6. The earphone circuit supporting wireless star flashing according to claim 1, wherein, The USB audio bridging unit is one of the following chips: CT7601, SPV5048, SA9312, and XU316.

7. The earphone circuit supporting wireless star flashing according to claim 1, wherein The wireless flash transceiver unit is one of the following chips: SLE05V100, Hi3853, TR5312, and AiW9651.

8. The earphone circuit supporting wireless star flashing according to claim 1, wherein, The audio DAC unit is one of the following chips: CS43131 chip, ES9039 chip, and AK4493 chip; The high-fidelity headphone amplifier unit is one of the following chips: SGM8262, OP1622, and RT686.

9. The earphone circuit supporting wireless star flashing according to claim 5, wherein, The battery management module is one of a TP4054 chip, a ME4075 chip and a TMI4054 chip.

10. An electronic device, comprising: The electronic device includes the wireless star flash supporting earphone circuit as claimed in any one of claims 1-9.

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