Loudspeaker driving switching circuit
By introducing a speaker driver switching circuit into the speaker system, the problem that home and car speaker systems cannot be taken into account both, and convenient switching and optimized audio output in different environments are achieved, especially the improvement of bass effect.
Patent Information
- Application Number
- CN202421645859.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-07-12
AI Technical Summary
Existing speaker systems usually only focus on specific areas, such as home speakers or car speakers, and cannot take into account both, resulting in users having to purchase and install multiple systems, increasing costs and complexity.
It provides a speaker drive switching circuit, including a power-on key, an integrated circuit, an external driver, a control module, a relay module and an amplifier module. Through the cooperation of the integrated circuit and the control module, the function of switching the driving signal between the home and the automobile environment is realized, and the relay module is used to accurately control the driver signal of the speaker.
It realizes the convenience of switching driver signals in different environments, reduces hardware and installation costs, and optimizes audio output effects, especially in bass effects to provide better performance.
Smart Images
Figure CN223142114U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of speaker driving, and in particular to a speaker driving switching circuit. Background Art
[0002] Existing speaker systems usually focus on specific areas, such as home speakers or car speakers, rather than both; traditional home speakers usually do not have the characteristics to adapt to the car environment, so users need to purchase and install multiple different systems to meet different needs, which increases cost and complexity. Utility Model Content
[0003] In order to solve the above technical problems, the present application provides a speaker drive switching circuit that can use a car's drive signal to drive a speaker to produce sound.
[0004] Specifically, the present application provides a speaker drive switching circuit, which at least includes a power button, an integrated circuit, an external driver, a control module, a relay module and a power amplifier module.
[0005] The control module is connected to the power button, the integrated circuit, the external drive and the relay module respectively; the relay module is also connected to the power amplifier module and the speaker respectively.
[0006] When the power button is pressed, the integrated circuit is turned on, and the control module outputs a high level to control the relay module to receive the first driving signal output by the power amplifier module to drive the speaker to sound.
[0007] Or when the external driver is turned on, the integrated circuit is turned off, and the control module outputs a low level to control the relay module to receive the second driving signal output by the external driver to drive the speaker to sound.
[0008] In the above technical solution, it is possible to conveniently switch between home and car environments, and the speaker system can adapt to different sources of driving signals through the switching mechanism of the power button and the external drive; the user can switch the driving signal through a simple button or external drive connection method without complicated settings or installation processes; the combination of the integrated circuit, the control module and the relay module effectively manages the switching of audio signals and the process of driving the speaker, ensuring that the speaker system works stably and reliably; different driving signals adapted to home and car environments respectively can be accurately switched through the control module and the relay module, thereby optimizing the audio output effect, especially providing better performance in enhancing the bass effect; compared to the traditional solution that requires two independent systems, this integrated multi-purpose design can save money on hardware and installation costs.
[0009] Furthermore, it also includes a system power supply, an external battery and a backup battery.
[0010] Furthermore, the integrated circuit at least includes an integrated chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a first triode, a second triode, a third triode, a fourth triode, and a rheostat.
[0011] The relay module at least includes a relay, a sixteenth resistor, a twentieth resistor, a third diode, and a fifth triode.
[0012] The power amplifier module at least includes a power amplifier, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twenty-second resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a sixteenth capacitor, a twenty-second capacitor, an audio system, a data line, a clock line, and a power control line.
[0013] In the above technical solution, by integrating the system power supply, an external battery, and a backup battery, this multi-purpose speaker system is not only more comprehensive in function but also able to provide stable power support in various usage scenarios, bringing a better user experience and convenience to users.
[0014] In addition, the relay module realizes the precise switching of different drive signals by including components such as electrolytic capacitors, inductors, and various resistors, thereby optimizing the audio output effect, especially showing more excellent performance in enhancing the bass effect; the power amplifier module integrates various resistors and capacitors and, when used in conjunction with the audio system and data lines, can provide a powerful and clear audio output to meet the different sound quality requirements in home and in-vehicle environments.
[0015] Further, the integrated chip and the third capacitor are connected to the system power supply, and the other end of the third capacitor is grounded; the other end of the integrated chip is respectively connected to the external battery, the second resistor, the second capacitor, and the third resistor; the external battery is also respectively connected to the first capacitor, the second resistor, and the second capacitor, and the other end of the first capacitor is grounded; the second resistor and the second capacitor are connected in parallel and jointly connected to the third resistor; the other end of the third resistor is connected to the collector of the second triode; the fourth capacitor and the tenth resistor are connected in parallel, and both ends are respectively connected to the base and the emitter of the second triode; at the same time, the emitter of the second triode is grounded together with the fourth capacitor and the tenth resistor; the fifth resistor is respectively connected to the tenth resistor and the sixth resistor; the tenth resistor is also connected to the ninth resistor and converges with the ninth resistor to access the collector of the fourth triode, and the other end of the ninth resistor accesses the first control interface of the control module; the other end of the sixth resistor is respectively connected to the seventh resistor and the base of the first triode, and the other end of the seventh resistor is grounded; the collector and the emitter of the first triode are respectively connected to both ends of the rheostat, and the emitter of the first triode is grounded together with one end of the rheostat; the other end of the rheostat is also respectively connected to the first resistor, the fourth resistor, and the eighth resistor, and the other end of the eighth resistor is grounded, and the other end of the fourth resistor accesses the second control interface of the control module; the base of the fourth triode is respectively connected to the fourteenth resistor and the fifteenth resistor, and the fifteenth resistor and the emitter of the fourth triode are grounded together, and the other end of the fourteenth resistor is connected to the emitter of the third triode; the collector of the third triode is connected to the eleventh resistor; the base of the third triode is respectively connected to the twelfth resistor, the thirteenth resistor, and the fifth capacitor, and the fifth capacitor and the thirteenth resistor are connected in parallel and grounded together.
[0016] In the above technical solution, electromagnetic interference often occurs during battery power supply, which will affect the normal operation of the device. By adding a capacitor next to the battery or power supply, the propagation of these interference signals can be effectively reduced, and the capacitor can also act as a protection component to prevent overvoltage from damaging other electronic components.
[0017] By setting a second resistor with an appropriate size in the circuit, the peak value of the current provided by the external battery to the integrated chip can be limited, and setting the second capacitor can effectively remove high-frequency noise and interference signals in the circuit, ensuring a stable power supply received by the integrated chip.
[0018] Further, the first link, the second link, the third link, and the fourth link are connected in parallel.
[0019] Among them, the first link includes a twelfth capacitor, a twenty-first resistor, a twenty-third resistor, and a twenty-first capacitor connected in series in sequence; the second link includes a thirteenth capacitor and an eighteenth capacitor connected in series in sequence, and the thirteenth capacitor and the eighteenth capacitor converge to ground; the third link includes a fourteenth capacitor and a nineteenth capacitor connected in series in sequence, and the fourteenth capacitor and the nineteenth capacitor converge to ground; the fourth link includes a fifteenth capacitor and a twentieth capacitor connected in series in sequence, and the fifteenth capacitor and the twentieth capacitor converge to ground.
[0020] Further, the electrolytic capacitor, the sixth capacitor, the seventh capacitor, and the eighth capacitor are connected in parallel, and are respectively connected to an external battery and ground at both ends; a first inductor is also connected between the twelfth capacitor and the thirteenth capacitor; a second inductor is also connected between the twenty-first capacitor and the eighteenth capacitor; the twelfth capacitor is also connected to the seventeenth capacitor; the thirteenth capacitor, the fourteenth capacitor, and the fifteenth capacitor converge to be connected to the fifth connection port of the relay; the eighteenth capacitor, the nineteenth capacitor, and the twentieth capacitor converge to be connected to the fourth interface of the relay.
[0021] In the above technical solution, the electrolytic capacitor and other parallel capacitors can effectively smooth the power supply provided by the external battery, reduce the noise and fluctuations in the circuit, and ensure the stable operation of the system, which is particularly important for applications with high requirements for power supply stability such as audio devices; the addition of the first inductor and the second inductor can form an LC circuit in series with the capacitor. This structure has good selectivity for signals of specific frequencies. By adjusting the values of the inductor and the capacitor, the frequency of the input signal can be adjusted and filtered, ensuring that only signals within a specific frequency range are transmitted and processed; the relay, as a switching element, can connect or disconnect the capacitors in the link as needed, thereby controlling the signal transmission path.
[0022] Further, the positive electrode of the third diode is respectively connected to the first interface of the relay and the external battery, and the negative electrode of the third diode is respectively connected to the eighth interface of the relay and the collector of the fifth triode; the base of the fifth triode is respectively connected to the sixteenth resistor and the twentieth resistor, and the other end of the sixteenth resistor is connected to the third control interface of the control module; the emitter of the fifth triode converges to ground with the twentieth resistor; the sixth interface of the relay is connected to the first drive interface of the external drive, and the third connection port of the relay is connected to the second drive interface of the external drive; the seventh connection port and the second connection port of the relay are respectively connected to the positive electrode and the negative electrode of the speaker.
[0023] In the above technical solution, the setting of the third diode can effectively prevent circuit damage when the external battery voltage is reversed, protecting the relay and other key components from damage; the fifth triode and the connected resistor and control module can achieve precise control and adjustment of the drive signal.
[0024] Further, the power amplifier at least includes a first PVDD interface, a second PVDD interface, a BST interface, a PGND interface, a positive output terminal, a negative output terminal, a PAD interface, an AGND interface, a first DGND interface, a second DGND interface, a first DVDD interface, a second DVDD interface, a GPIO interface, an audio interface, an SDA interface, an SCL interface, a PCN interface, and an AVDD interface.
[0025] Further, the first PVDD interface and the second PVDD interface are connected to the eighth capacitor; the positive output terminal and the negative output terminal are respectively connected to the twelfth capacitor and the twenty-first capacitor; the BST interface is connected to the seventeenth capacitor; the first DGND interface is connected to the ninth capacitor and the eleventh capacitor, and one ends of the ninth capacitor and the eleventh capacitor are joined and then respectively connected to the first DVDD interface and the twenty-second resistor, and the other end of the twenty-second resistor is connected to the GPIO interface; the ninth capacitor, the eleventh capacitor, the sixteenth capacitor, and the second DGND interface are joined and grounded, and the other end of the sixteenth capacitor is connected to the second DVDD interface; the audio system is connected to the audio interface; the seventeenth resistor is connected to any point on the connection line between the data line and the twenty-fourth resistor, and the other end of the twenty-fourth resistor is connected to the SDA interface; the eighteenth resistor is connected to any point on the connection line between the clock line and the twenty-fifth resistor, and the other end of the twenty-fifth resistor is connected to the SCL interface; the nineteenth resistor is connected to any point on the connection line between the power control line and the twenty-sixth resistor, and the other end of the twenty-sixth resistor is connected to the PCN interface; one end of the twenty-seventh resistor is connected to any point on the connection line between the twenty-sixth resistor and the PCN interface, and one end of the twenty-second capacitor is connected to the AVDD interface; the other ends of the twenty-sixth resistor and the twenty-second capacitor are joined and grounded; the seventeenth resistor, the eighteenth resistor, the nineteenth resistor, the ninth capacitor, the eleventh capacitor, and the tenth capacitor are joined and connected to an external battery, and the other end of the tenth capacitor is grounded.
[0026] In the above technical solution, the first PVDD interface and the second PVDD interface are connected through an eighth capacitor, effectively smoothing the power supply voltage of the power amplifier, reducing voltage noise and fluctuations, and ensuring stable audio output quality; the BST interface is connected to a seventeenth capacitor to help improve the working efficiency and stability of the power amplifier; the positive output terminal and the negative output terminal are connected to the speaker through relevant devices to realize the speaker playing relevant audio; the SDA interface and the SCL interface are respectively connected through a twenty-fourth resistor and a twenty-fifth resistor to realize I2C communication with external devices; the PCN interface is connected to the power supply control line through a twenty-sixth resistor to provide flexible control and management of the power amplifier power supply; the GPIO interface is connected to a twenty-second resistor and a ninth capacitor to allow precise control of the state of the power amplifier; the AVDD interface is connected to a twenty-second capacitor to support stable power supply for other parts of the system; the ninth capacitor and the eleventh capacitor are connected to the first DVDD interface and the second DVDD interface to provide circuit protection and stability through comprehensive grounding.
[0027] Further, one end of the power-on key is respectively connected to the fifth resistor and the sixth resistor, and the other end is connected to an external battery.
[0028] The external driver is respectively connected to the eleventh resistor and the twelfth resistor.
[0029] The backup battery is respectively connected to the first resistor and the fourth control interface of the control module.
[0030] In the above technical solution, the start or shutdown of the system can be controlled through the power-on key; the external driver is connected with resistors to protect the circuit and limit the current; the backup battery is respectively connected through the first resistor and the fourth control interface of the control module. This connection method can realize the monitoring and management of the backup battery, ensure timely switching to the backup battery when the main power supply fails, and ensure the continuous operation of the system and the security of data.
[0031] Compared with the prior art, the beneficial effects of the present application are as follows:
[0032] The present application provides a speaker drive switching circuit, which at least includes a power-on key, an integrated circuit, an external drive, a control module, a relay module, and a power amplifier module; the control module is respectively connected to the power-on key, the integrated circuit, the external drive, and the relay module; the relay module is also respectively connected to the power amplifier module and the speaker; when the power-on key is pressed, the integrated circuit is turned on, and the control module outputs a high level to control the relay module to receive the first drive signal output by the power amplifier module to drive the speaker to sound; or when the external drive is turned on, the integrated circuit is turned off, and the control module outputs a low level to control the relay module to receive the second drive signal output by the external drive to drive the speaker to sound. The present application can enable the speaker to adapt to different sources of drive signals, and can switch the drive signals through a simple key or external drive connection method, without a complex setting or installation process, with a low cost, and a good enhanced bass effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Figure 1 is the speaker drive switching circuit described in the present application.
[0034] Figure 2 is Figure 1 the power-on key described above.
[0035] Figure 3 is Figure 1 the integrated circuit described above.
[0036] Figure 4 is Figure 1 the external drive described above.
[0037] Figure 5 is Figure 1 the control module described above.
[0038] Figure 6 is Figure 1 the relay module described above.
[0039] Figure 7 is Figure 1 the power amplifier module described above. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0040] The following further describes in detail a speaker drive switching circuit of the present application in conjunction with specific embodiments and the accompanying drawings.
[0041] Please refer to Figure 1 , the present application provides a speaker drive switching circuit, which at least includes a power-on key POWER KEY (see Figure 2 ), an integrated circuit (see Figure 3 ), an external drive (see Figure 4 ), a control module (see Figure 5 ), a relay module (seeFigure 6 ), and the power amplifier module (see Figure 7 ).
[0042] The control module is respectively connected to the power-on key, the integrated circuit, the external drive, and the relay module; the relay module is also respectively connected to the power amplifier module and the speaker.
[0043] When the power-on key POWER KEY is pressed, the integrated circuit is turned on, and the control module outputs a high level to control the relay module to receive the first drive signal output by the power amplifier module to drive the speaker to sound.
[0044] Or when the external drive is turned on, the integrated circuit is turned off, and the control module outputs a low level to control the relay module to receive the second drive signal output by the external drive to drive the speaker to sound.
[0045] In the above technical solution, it can be conveniently switched between home and automotive environments. Through the switching mechanism of the power-on key POWER KEY and the external drive, the speaker system can adapt to different drive signal sources; users can switch the drive signal through a simple key or external drive connection method without a complex setup or installation process; the combination of the integrated circuit, the control module, and the relay module effectively manages the switching of audio signals and the process of driving the speaker, ensuring the stable and reliable operation of the speaker system; the different drive signals suitable for home and automotive environments can be precisely switched through the control module and the relay module, thereby optimizing the audio output effect, especially providing better performance in enhancing the bass effect; compared with the traditional solution that requires two sets of independent systems, this integrated multi-purpose design can save expenses on hardware and installation costs.
[0046] Further, it also includes the system power supply SYSTM_PWR, the external battery, and the backup battery RTCVDD.
[0047] Further, the integrated circuit at least includes the integrated chip D1, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, the eighth resistor R8, the ninth resistor R9, the tenth resistor R10, the eleventh resistor R11, the twelfth resistor R12, the thirteenth resistor R13, the fourteenth resistor R14, the fifteenth resistor R15, the first triode Q1, the second triode Q2, the third triode Q3, the fourth triode Q4, and the rheostat D2.
[0048] The relay module at least includes the relay RL1, the sixteenth resistor R16, the twentieth resistor R20, the third diode D3, and the fifth triode Q5.
[0049] The power amplifier module at least includes a power amplifier AMP, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twenty-second resistor R22, a twenty-fourth resistor R24, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a twenty-seventh resistor R27, an electrolytic capacitor EC1, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a sixteenth capacitor C16, a seventeenth capacitor C17, a twenty-second capacitor C16, a first inductor L1, a second inductor L2, an audio system, a data line AMP_I2C_SDA, a clock line AMP_I2C_SCL, a power control line PDN, a first link, a second link, a third link, and a fourth link.
[0050] It should be noted that the power amplifier module is conventional, and the reasons for and advantages of the connections between its various components will not be described in detail here.
[0051] In the above technical solution, by integrating the system power supply SYSTM_PWR, an external battery, and a backup battery RTCVDD, this multi-purpose speaker system is not only more comprehensive in function but also able to provide stable power support in various usage scenarios, bringing a better user experience and convenience to users.
[0052] In addition, the relay module, by including components such as an electrolytic capacitor EC1, an inductor, and various resistors, realizes the precise switching of different drive signals, thereby optimizing the audio output effect, especially showing more excellent performance in enhancing the bass effect; the power amplifier module integrates various resistors and capacitors and, when used in conjunction with an audio system and a data line AMP_I2C_SDA, etc., can provide a powerful and clear audio output to meet the different audio quality requirements in home and in-vehicle environments.
[0053] Further, the integrated chip D1 and the third capacitor C3 are connected to the system power supply SYSTM_PWR, and the other end of the third capacitor C3 is grounded; the other end of the integrated chip D1 is respectively connected to the external battery, the second resistor R2, the second capacitor C2, and the third resistor R3; the external battery is also respectively connected to the first capacitor C1, the second resistor R2, and the second capacitor C2, and the other end of the first capacitor C1 is grounded; the second resistor R2 and the second capacitor C2 are connected in parallel and jointly connected to the third resistor R3; the other end of the third resistor R3 is connected to the collector of the second triode Q2; the fourth capacitor C4 and the tenth resistor R10 are connected in parallel, and both ends are respectively connected to the base and the emitter of the second triode Q2; at the same time, the emitter of the second triode Q2 converges with the fourth capacitor C4 and the tenth resistor R10 to be grounded; the fifth resistor R5 is respectively connected to the tenth resistor R10 and the sixth resistor R6; the tenth resistor R10 is also connected to the ninth resistor R9 and converges with the ninth resistor R9 to be connected to the collector of the fourth triode Q4, and the other end of the ninth resistor R9 is connected to the first control interface of the control module (i.e., pin 44 of the MCU, which is a common GPIO interface); the other end of the sixth resistor R6 is respectively connected to the seventh resistor R7 and the base of the first triode Q1, and the other end of the seventh resistor R7 is grounded; the collector and the emitter of the first triode Q1 are respectively connected to both ends of the variable resistor D2, and the emitter of the first triode Q1 converges with one end of the variable resistor D2 to be grounded; the other end of the variable resistor D2 is also respectively connected to the first resistor R1, the fourth resistor R4, and the eighth resistor R8, and the other end of the eighth resistor R8 is grounded, and the other end of the fourth resistor R4 is connected to the second control interface of the control module (i.e., pin 29 of the MCU, which is the power-on / off detection pin); the base of the fourth triode Q4 is respectively connected to the fourteenth resistor R14 and the fifteenth resistor R15, and the fifteenth resistor R15 and the emitter of the fourth triode converge to be grounded, and the other end of the fourteenth resistor R14 is connected to the emitter of the third triode Q3; the collector of the third triode Q3 is connected to the eleventh resistor R11; the base of the third triode Q3 is respectively connected to the twelfth resistor R12, the thirteenth resistor R13, and the fifth capacitor C5, and the fifth capacitor C5 and the thirteenth resistor R13 are connected in parallel and converge to be grounded.
[0054] In addition, the system power supply SYSTM_PWR is also connected to the BAT interface of the control module to supply power to the control module MCU.
[0055] It should be noted that the S1 pole, S2 pole, and S3 pole of the integrated chip D1 are all connected to the external battery BAT, the first capacitor C1, the second resistor R2, and the second capacitor C2; the G pole of the integrated chip D1 is connected to the other ends of the second resistor R2 and the second capacitor C2; the D5 pole, D6 pole, D7 pole, and D8 pole of the integrated chip are all connected to the system power supply.
[0056] In the above technical solution, battery power supply often generates electromagnetic interference, which will affect the normal operation of the device. By adding capacitors beside the battery or power supply, the propagation of these interference signals can be effectively reduced, and the capacitors can also act as protection components to prevent overvoltage from damaging other electronic components.
[0057] By setting the second resistor R2 with an appropriate size in the circuit, the peak value of the current provided by the external battery to the integrated chip D1 can be limited, and setting the second capacitor C2 can effectively remove high-frequency noise and interference signals in the circuit, ensuring that the integrated chip D1 receives a stable power supply.
[0058] Furthermore, the first link, the second link, the third link, and the fourth link are connected in parallel.
[0059] Among them, the first link includes the twelfth capacitor C12, the twenty-first resistor R21, the twenty-third resistor R23, and the twenty-first capacitor C21 connected in series in sequence; the second link includes the thirteenth capacitor C13 and the eighteenth capacitor C18 connected in series in sequence, and the thirteenth capacitor C13 and the eighteenth capacitor C18 converge to ground; the third link includes the fourteenth capacitor C14 and the nineteenth capacitor C19 connected in series in sequence, and the fourteenth capacitor C14 and the nineteenth capacitor C19 converge to ground; the fourth link includes the fifteenth capacitor C15 and the twentieth capacitor C20 connected in series in sequence, and the fifteenth capacitor C15 and the twentieth capacitor C20 converge to ground.
[0060] Furthermore, a first inductor L1 is also connected between the twelfth capacitor C12 and the thirteenth capacitor C13, and a second inductor L2 is also connected between the twenty-first capacitor C21 and the eighteenth capacitor C18; the twelfth capacitor C12 is also connected to the seventeenth capacitor C17; the thirteenth capacitor C13, the fourteenth capacitor C14, and the fifteenth capacitor C15 converge and are connected to the fifth connection port of the relay RL1; the eighteenth capacitor C18, the nineteenth capacitor C19, and the twentieth capacitor C20 converge and are connected to the fourth interface of the relay RL1.
[0061] In the above technical solution, the addition of the first inductor L1 and the second inductor L2 can form an LC circuit in series with the capacitor. This structure has good selectivity for signals of specific frequencies. By adjusting the values of the inductor and the capacitor, the frequency of the input signal can be adjusted and filtered to ensure that only signals within a specific frequency range are transmitted and processed. The relay RL1, as a switching element, can connect or disconnect the capacitor in the link as needed, thereby controlling the signal transmission path.
[0062] Further, the electrolytic capacitor EC1, the sixth capacitor C6, the seventh capacitor C7, and the eighth capacitor C8 are connected in parallel, and both ends are respectively connected to the external battery and grounded. The positive electrode of the third diode D3 is respectively connected to the first interface of the relay RL1 and the external battery, and the negative electrode of the third diode D3 is respectively connected to the eighth interface of the relay RL1 and the collector of the fifth triode Q5. The base of the fifth triode Q5 is respectively connected to the sixteenth resistor R16 and the twentieth resistor R20, and the other end of the sixteenth resistor R16 is connected to the third control interface of the control module (i.e., pin 62 of the MCU, which is a general-purpose GPIO port). The emitter of the fifth triode Q5 is grounded together with the twentieth resistor R20. The sixth interface of the relay RL1 is connected to the first drive interface of the external drive, and the third connection port of the relay RL1 is connected to the second drive interface of the external drive. The seventh connection port and the second connection port of the relay RL1 are respectively connected to the positive and negative poles of the speaker.
[0063] In the above technical solution, the electrolytic capacitor EC1 and the other parallel capacitors can effectively smooth the power supply provided by the external battery, reduce the noise and fluctuations in the circuit, and ensure the stable operation of the system, which is particularly important for applications with high requirements for power supply stability such as audio devices. The setting of the third diode D3 can effectively prevent circuit damage when the voltage of the external battery is reversed, protecting the relay RL1 and other key components from damage. The fifth triode Q5 and the connected resistors and the control module can achieve precise control and adjustment of the drive signal.
[0064] Further, the power amplifier AMP at least includes a first PVDD interface, a second PVDD interface, a BST interface, a PGND interface, a positive output terminal, a negative output terminal, a PAD interface, an AGND interface, a first DGND interface, a second DGND interface, a first DVDD interface, a second DVDD interface, a GPIO interface, an audio interface, an SDA interface, an SCL interface, a PCN interface, and an AVDD interface.
[0065] Further, the first PVDD interface and the second PVDD interface are connected to the eighth capacitor C8; the positive output terminal and the negative output terminal are respectively connected to the twelfth capacitor C12 and the twenty-first capacitor C21; the BST interface is connected to the seventeenth capacitor C17; the first DGND interface is connected to the ninth capacitor C9 and the eleventh capacitor C11, and one ends of the ninth capacitor C9 and the eleventh capacitor C11 are joined and then are respectively connected to the first DVDD interface and the twenty-second resistor R22, and the other end of the twenty-second resistor R22 is connected to the GPIO interface; the ninth capacitor C9, the eleventh capacitor C11, the sixteenth capacitor C16 and the second DGND interface are joined and grounded, and the other end of the sixteenth capacitor C16 is connected to the second DVDD interface; the audio system is connected to the audio interface; the seventeenth resistor R17 is connected to any point on the connection line between the data line AMP_I2C_SDA and the twenty-fourth resistor R24, and the other end of the twenty-fourth resistor R24 is connected to the SDA interface; the eighteenth resistor R18 is connected to any point on the connection line between the clock line AMP_I2C_SCL and the twenty-fifth resistor R25, and the other end of the twenty-fifth resistor R25 is connected to the SCL interface; the nineteenth resistor R19 is connected to any point on the connection line between the power control line PDN and the twenty-sixth resistor R26, and the other end of the twenty-sixth resistor R26 is connected to the PCN interface; one end of the twenty-seventh resistor R27 is connected to any point on the connection line between the twenty-sixth resistor R26 and the PCN interface, and one end of the twenty-second capacitor C16 is connected to the AVDD interface; the other ends of the twenty-sixth resistor R26 and the twenty-second capacitor C16 are joined and grounded; the seventeenth resistor R17, the eighteenth resistor R18, the nineteenth resistor R19, the ninth capacitor C9, the eleventh capacitor C11 and the tenth capacitor C10 are joined and connected to an external battery, and the other end of the tenth capacitor C10 is grounded.
[0066] In the above technical solution, the first PVDD interface and the second PVDD interface are connected through the eighth capacitor C8, effectively smoothing the power supply voltage of the power amplifier AMP, reducing voltage noise and fluctuations, and ensuring stable audio output quality; the BST interface is connected to the seventeenth capacitor C17 to help improve the working efficiency and stability of the power amplifier AMP; the positive output terminal and the negative output terminal are connected to the speaker through relevant devices to realize the speaker playing relevant audio; the SDA interface and the SCL interface are respectively connected through the twenty-fourth resistor R24 and the twenty-fifth resistor R25 to realize I2C communication with external devices; the PCN interface is connected to the power supply control line PDN through the twenty-sixth resistor R26 to provide flexible control and management of the power supply of the power amplifier AMP; the GPIO interface is connected to the ninth capacitor C9 through the twenty-second resistor R22 to allow precise control of the state of the power amplifier AMP; the AVDD interface is connected to the twenty-second capacitor C16 to support stable power supply for other parts of the system; the ninth capacitor C9 and the eleventh capacitor C11 are connected to the first DVDD interface and the second DVDD interface to provide circuit protection and stability through comprehensive grounding.
[0067] Further, one end of the power-on key POWER KEY is respectively connected to the fifth resistor R5 and the sixth resistor R6, and the other end is connected to an external battery.
[0068] The external drive is respectively connected to the eleventh resistor R11 and the twelfth resistor R12.
[0069] The backup battery RTCVDD is respectively connected to the first resistor R1 and the fourth control interface of the control module (i.e., pin 28 of the MCU, which outputs a 1.2V voltage inside the MCU and is used to provide a pull-up voltage for pin 29).
[0070] In the above technical solution, the start or shutdown of the system can be controlled through the power-on key; the external drive is connected with resistors to protect the circuit and limit the current; the backup battery RTCVDD is respectively connected through the first resistor R1 and the fourth control interface of the control module. This connection method can realize the monitoring and management of the backup battery RTCVDD, ensure timely switching to the backup battery RTCVDD when the main power supply fails, and ensure the continuous operation of the system and the security of data.
[0071] When this application is working, specifically:
[0072] When the POWER KEY is pressed, the external battery voltage is supplied to the fifth resistor R5. At this time, the base of the third diode Q2 is at a high level, the voltage difference between the DS poles of the integrated chip is -6V, the integrated chip conducts, and the system power supply is powered on. At the same time, the voltage of the external battery connected by the POWER KEY is supplied to the first triode Q1 for the control module (MCU) to detect. The MCU outputs a high level to the ninth resistor R9, making the integrated chip D1 continuously conduct. At the same time, the MCU outputs a high level to the sixteenth resistor R16, causing the fourth and fifth interfaces of the relay to conduct. The audio signal is input from the external audio system through the audio interfaces of the power amplifier (including the FSYNC interface, BCLK interface, and ISOMN interface) to the power amplifier, and then output to the speaker through the positive output terminal and the negative output terminal to drive the speaker to emit sound.
[0073] When the speaker is connected to an automobile or other device (external drive), the horn signal of the automobile is input, and a 12V voltage is also input at the same time. At this time, both the eleventh resistor R11 and the twelfth resistor R12 are at a voltage of 12 - 15V, the third triode Q3 is at a high level, the fourth triode Q4 is also at a high level, and the base of the second triode becomes low level. At this time, the voltage difference between the DS poles of the integrated chip is 0, the integrated chip is cut off, the system power supply is powered off. At this time, the sixteenth resistor R16 is at a low level, and the external drive J1 2PN_254 is connected to the relay and drives the speaker to emit sound.
[0074] This application provides a horn drive switching circuit, which at least includes a power-on key, an integrated circuit, an external drive, a control module, a relay module, and a power amplifier module; the control module is respectively connected to the power-on key, the integrated circuit, the external drive, and the relay module; the relay module is also respectively connected to the power amplifier module and the speaker; when the power-on key is pressed, the integrated circuit conducts, and the control module outputs a high level to control the relay module to receive the first drive signal output by the power amplifier module to drive the speaker to emit sound; or when the external drive conducts, the integrated circuit is cut off, and the control module outputs a low level to control the relay module to receive the second drive signal output by the external drive to drive the speaker to emit sound. This application can enable the speaker to adapt to different sources of drive signals, and can switch the drive signals through simple key presses or external drive connection methods, without complex settings or installation processes, with low costs, and good enhanced bass effects.
[0075] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of the present application thereto. Those of ordinary skill in the art can make various changes and modifications therein without departing from the scope and spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as claimed in the appended claims.
[0076] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0077] Although the description of the present application is carried out in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.
Claims
1. A horn drive switching circuit, characterized in that, It includes at least a power-on button, an integrated circuit, an external driver, a control module, a relay module, and a power amplifier module; The control module is respectively connected to the power-on button, the integrated circuit, the external driver, and the relay module; the relay module is also respectively connected to the power amplifier module and the speaker; When the power-on button is pressed, the integrated circuit is turned on, and the control module outputs a high level to control the relay module to receive the first driving signal output by the power amplifier module to drive the speaker to sound; Or when the external driver is turned on, the integrated circuit is turned off, and the control module outputs a low level to control the relay module to receive the second driving signal output by the external driver to drive the speaker to sound.
2. The horn drive switching circuit according to claim 1, wherein It further includes a system power supply, an external battery, and a backup battery.
3. The horn drive switching circuit according to claim 2, characterized in that The integrated circuit includes at least an integrated chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a first triode, a second triode, a third triode, a fourth triode, and a variable resistor; The relay module includes at least a relay, a sixteenth resistor, a twentieth resistor, a third diode, and a fifth triode; The power amplifier module includes at least a power amplifier, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twenty-second resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, an electrolytic capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a sixteenth capacitor, a seventeenth capacitor, a twenty-second capacitor, a first inductor, a second inductor, an audio system, a data line, a clock line, and a power control line, a first link, a second link, a third link, and a fourth link.
4. The horn drive switching circuit according to claim 3, wherein The integrated chip and the third capacitor are connected to the system power supply, and the other end of the third capacitor is grounded; the other end of the integrated chip is respectively connected to the external battery, the second resistor, the second capacitor and the third resistor; the external battery is also respectively connected to the first capacitor, the second resistor and the second capacitor, and the other end of the first capacitor is grounded; the second resistor and the second capacitor are in parallel and are commonly connected to the third resistor; the other end of the third resistor is connected to the collector of the second triode; the fourth capacitor and the tenth resistor are in parallel, and both ends are respectively connected to the base and the emitter of the second triode; at the same time, the emitter of the second triode converges with the fourth capacitor and the tenth resistor to be grounded; the fifth resistor is respectively connected to the tenth resistor and the sixth resistor; the tenth resistor is also connected to the ninth resistor and converges with the ninth resistor to be connected to the collector of the fourth triode, and the other end of the ninth resistor is connected to the first control interface of the control module; the other end of the sixth resistor is respectively connected to the seventh resistor and the base of the first triode, and the other end of the seventh resistor is grounded; the collector and the emitter of the first triode are respectively connected to both ends of the rheostat, and the emitter of the first triode converges with one end of the rheostat to be grounded; the other end of the rheostat is also respectively connected to the first resistor, the fourth resistor and the eighth resistor, and the other end of the eighth resistor is grounded, and the other end of the fourth resistor is connected to the second control interface of the control module; the base of the fourth triode is respectively connected to the fourteenth resistor and the fifteenth resistor, and the fifteenth resistor and the emitter of the fourth triode converge to be grounded, and the other end of the fourteenth resistor is connected to the emitter of the third triode; the collector of the third triode is connected to the eleventh resistor; the base of the third triode is respectively connected to the twelfth resistor, the thirteenth resistor and the fifth capacitor, and the fifth capacitor and the thirteenth resistor are in parallel and converge to be grounded.
5. The horn drive switching circuit according to claim 3, wherein The first link, the second link, the third link and the fourth link are in parallel; Among them, the first link includes a twelfth capacitor, a twenty-first resistor, a twenty-third resistor and a twenty-first capacitor connected in series in sequence; the second link includes a thirteenth capacitor and an eighteenth capacitor connected in series in sequence, and the thirteenth capacitor and the eighteenth capacitor converge to be grounded; the third link includes a fourteenth capacitor and a nineteenth capacitor connected in series in sequence, and the fourteenth capacitor and the nineteenth capacitor converge to be grounded; the fourth link includes a fifteenth capacitor and a twentieth capacitor connected in series in sequence, and the fifteenth capacitor and the twentieth capacitor converge to be grounded.
6. The horn drive switching circuit according to claim 3, wherein The electrolytic capacitor, the sixth capacitor, the seventh capacitor and the eighth capacitor are in parallel, and both ends are respectively connected to the external battery and grounded; A first inductor is also connected between the twelfth capacitor and the thirteenth capacitor, and a second inductor is also connected between the twenty-first capacitor and the eighteenth capacitor; The twelfth capacitor is also connected to the seventeenth capacitor; The thirteenth capacitor, the fourteenth capacitor and the fifteenth capacitor converge to be connected to the fifth connection port of the relay; The eighteenth capacitor, the nineteenth capacitor, and the twentieth capacitor are combined and connected to the fourth interface of the relay.
7. The horn drive switching circuit according to claim 3, characterized in that The positive electrode of the third diode is respectively connected to the first interface of the relay and an external battery, and the negative electrode of the third diode is respectively connected to the eighth interface of the relay and the collector of the fifth triode; the base of the fifth triode is respectively connected to the sixteenth resistor and the twentieth resistor, and the other end of the sixteenth resistor is connected to the third control interface of the control module; the emitter of the fifth triode is combined with the twentieth resistor and grounded. The sixth interface of the relay is connected to the first drive interface of the external drive, and the third connection port of the relay is connected to the second drive interface of the external drive; the seventh connection port and the second connection port of the relay are respectively connected to the positive electrode and the negative electrode of the speaker.
8. The horn drive switching circuit according to claim 3, wherein, The power amplifier at least includes a first PVDD interface, a second PVDD interface, a BST interface, a PGND interface, a positive output terminal, a negative output terminal, a PAD interface, an AGND interface, a first DGND interface, a second DGND interface, a first DVDD interface, a second DVDD interface, a GPIO interface, an audio interface, an SDA interface, an SCL interface, a PCN interface, and an AVDD interface.
9. The horn drive switching circuit according to claim 8, wherein, The first PVDD interface and the second PVDD interface are connected to the eighth capacitor; the positive output terminal and the negative output terminal are respectively connected to the twelfth capacitor and the twenty-first capacitor; the BST interface is connected to the seventeenth capacitor. The first DGND interface is connected to the ninth capacitor and the eleventh capacitor, and one ends of the ninth capacitor and the eleventh capacitor are combined and then respectively connected to the first DVDD interface and the twenty-second resistor, and the other end of the twenty-second resistor is connected to the GPIO interface; the ninth capacitor, the eleventh capacitor, the sixteenth capacitor, and the second DGND interface are combined and grounded, and the other end of the sixteenth capacitor is connected to the second DVDD interface; the audio system is connected to the audio interface. The seventeenth resistor is connected to any point on the connection line between the data line and the twenty-fourth resistor, and the other end of the twenty-fourth resistor is connected to the SDA interface; the eighteenth resistor is connected to any point on the connection line between the clock line and the twenty-fifth resistor, and the other end of the twenty-fifth resistor is connected to the SCL interface; the nineteenth resistor is connected to any point on the connection line between the power control line and the twenty-sixth resistor, and the other end of the twenty-sixth resistor is connected to the PCN interface; one end of the twenty-seventh resistor is connected to any point on the connection line between the twenty-sixth resistor and the PCN interface, and one end of the twenty-second capacitor is connected to the AVDD interface; the other ends of the twenty-sixth resistor and the twenty-second capacitor are combined and grounded; the seventeenth resistor, the eighteenth resistor, the nineteenth resistor, the ninth capacitor, the eleventh capacitor, and the tenth capacitor are combined and connected to an external battery, and the other end of the tenth capacitor is grounded.
10. The horn drive switching circuit according to claim 3, wherein, One end of the power-on key is respectively connected to the fifth resistor and the sixth resistor, and the other end is connected to an external battery. The external drive is respectively connected to the eleventh resistor and the twelfth resistor. The backup battery is respectively connected to the first resistor and the fourth control interface of the control module.