Sound card power amplifier adjusting circuit, sound card power amplifier adjusting system and large interactive screen

Abstract

The utility model relates to the technical field of interactive large screens, and discloses a sound card power amplifier adjusting circuit, a sound card power amplifier adjusting system and an interactive large screen. The sound card power amplifier adjusting circuit comprises a control module, a sound card power supply control module, a power amplifier power supply control module, a sound card module, a power amplifier module and a concentrator module. The control module is electrically connected with the sound card power supply control module, the power amplifier power supply control module, the sound card module and the power amplifier module, the sound card power supply control module is electrically connected with the sound card module, the power amplifier power supply control module is electrically connected with the power amplifier module, and the sound card module is electrically connected with the concentrator module and the power amplifier module. The concentrator module is used for being electrically connected with the mainboard. According to the sound card power amplifier adjusting circuit provided by the embodiment of the invention, the control module, the sound card module and the power amplifier module are arranged, so that the power amplifier parameters can be adjusted, and the audio output quality can be optimized as required. A user or a system is allowed to dynamically adjust power amplifier parameters according to different audio contents and use environments so as to achieve a relatively high tone quality effect.

Description

Technical Field

[0001] The present application relates to the technical field of interactive large screens, and in particular to a sound card power amplifier adjustment circuit, a sound card power amplifier adjustment system and an interactive large screen. Background Art

[0002] Currently, interactive large-screen sound card and amplifier systems generally use an onboard design, where the sound card and amplifier circuits are soldered directly onto the motherboard. This approach simplifies circuit connections to a certain extent, but in practice, especially for products with special requirements for sound quality, the onboard design limits product customization and scalability, and it is impossible to flexibly adjust amplifier parameters to optimize sound quality according to different customer needs. Utility Model Content

[0003] The embodiments of the present application provide a sound card amplifier adjustment circuit, a sound card amplifier adjustment system and an interactive large screen, which can solve the problem that the existing interactive large screen adopts an on-board design and cannot flexibly adjust the amplifier parameters to optimize the sound quality according to the needs of different customers.

[0004] In a first aspect, an embodiment of the present application provides a sound card power amplifier regulation circuit, comprising a control module, a sound card power supply control module, a power amplifier power supply control module, a sound card module, a power amplifier module, and a hub module, wherein the control module is electrically connected to the sound card power supply control module, the power amplifier power supply control module, the sound card module, and the power amplifier module, respectively; the sound card power supply control module is electrically connected to the sound card module; the power amplifier power supply control module is electrically connected to the power amplifier module; the sound card module is electrically connected to the hub module and the power amplifier module, respectively; and the hub module is configured to be electrically connected to a mainboard;

[0005] The control module is used to output a first control signal to the sound card power supply control module after the mainboard outputs a power-on signal; the sound card power supply control module is used to power the sound card module according to the first control signal; the sound card module is used to output a first level signal to the control module when receiving the first audio signal output by the mainboard through the hub module, and output a second audio signal to the power amplifier module; the control module is also used to output a second control signal to the power amplifier power supply control module according to the first level signal; the power amplifier power supply control module is used to power the power amplifier module according to the second control signal; the power amplifier module is used to configure the second audio signal according to the configuration file output by the control module, and output the target audio signal.

[0006] In a possible implementation of the first aspect, the control module includes a processing chip, and the processing chip is electrically connected to the sound card power supply control module, the power amplifier power supply control module, the sound card module, and the power amplifier module respectively.

[0007] In a possible implementation of the first aspect, the sound card power supply control module includes a first resistor, a second resistor, a first switching tube and a first transistor, wherein the first end of the first resistor is electrically connected to the source of the first switching tube and the first power supply, respectively, the second end of the first resistor is electrically connected to the gate of the first switching tube and the collector of the first transistor, respectively, the first end of the second resistor is electrically connected to the control module, the second end of the second resistor is electrically connected to the base of the first transistor, the drain of the first switching tube is electrically connected to the sound card module, and the emitter of the first transistor is grounded.

[0008] In a possible implementation of the first aspect, the power amplifier power supply control module includes a third resistor, a fourth resistor, a second switching tube and a second triode, the first end of the third resistor is electrically connected to the source of the second switching tube and the second power supply, respectively, the second end of the third resistor is electrically connected to the gate of the second switching tube and the collector of the second triode, the first end of the fourth resistor is electrically connected to the control module, the second end of the fourth resistor is electrically connected to the base of the second triode, the drain of the second switching tube is electrically connected to the power amplifier module, and the emitter of the second triode is grounded.

[0009] In a possible implementation of the first aspect, the sound card module includes a sound card chip, a power supply end of the sound card chip is electrically connected to the sound card power supply control module, an input end of the sound card chip is electrically connected to the hub module, a first output end of the sound card chip is electrically connected to the control module, and a second output end of the sound card chip is electrically connected to the power amplifier module.

[0010] In a possible implementation of the first aspect, the power amplifier module includes a power amplifier chip, a power supply end of the power amplifier chip is electrically connected to the power amplifier power supply control module, a first input end of the power amplifier chip is electrically connected to the sound card module, a second input end of the power amplifier chip is electrically connected to the control module, and an output end of the power amplifier chip is used to output the target audio signal.

[0011] In a possible implementation of the first aspect, the control module outputs the configuration file to the power amplifier module through I2C after outputting the second control signal to the power amplifier power supply control module for a preset time.

[0012] In a possible implementation manner of the first aspect, the hub module includes a hub, and the hub is electrically connected to the mainboard and the sound card module respectively.

[0013] In a second aspect, an embodiment of the present application provides a sound card power amplifier adjustment system, comprising a mainboard and the sound card power amplifier adjustment circuit according to any one of the first aspects, wherein the mainboard is electrically connected to a hub module in the sound card power amplifier adjustment circuit;

[0014] The mainboard is used to output a power-on signal, and is also used to output a first audio signal to the hub module.

[0015] In a third aspect, an embodiment of the present application provides an interactive large screen, including the sound card amplifier adjustment system described in the second aspect.

[0016] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0017] The sound card power amplifier regulation circuit provided in the embodiment of the present application includes a control module, a sound card power supply control module, a power amplifier power supply control module, a sound card module, a power amplifier module and a hub module. The hub module is connected to the mainboard, and the mainboard can output a power-on signal. After the control module receives the power-on signal output by the mainboard, it outputs a first control signal to the sound card power supply control module, so that the sound card power supply control module supplies power to the sound card module. At this time, if the sound card module does not receive the first audio signal output by the mainboard through the hub module, the sound card module will not start working. Only when the sound card module receives the first audio signal output by the mainboard through the hub module will it output a first level signal to the control module and output a second audio signal to the power amplifier module. The control module outputs a second control signal to the power amplifier power supply control module according to the first level signal, so that the power amplifier power supply control module supplies power to the power amplifier module. The power amplifier module can configure the second audio signal according to the configuration file output by the control module, and finally output the target audio signal. As can be seen, the sound card amplifier adjustment circuit provided in the embodiments of the present application, by providing a control module, a sound card module, and an amplifier module, can adjust the amplifier parameters, thereby optimizing the audio output quality as needed. This design allows the user or system to dynamically adjust the amplifier parameters based on different audio content and usage environments to achieve higher sound quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical features of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 This is a principle block diagram of the sound card power amplifier regulation circuit provided by this application;

[0020] Figure 2 This is a circuit connection diagram of the control module provided by this application;

[0021] Figure 3 This is a schematic diagram of the indicator light circuit connection of the control module;

[0022] Figure 4 This is a schematic diagram of the debugging circuit connection of the control module;

[0023] Figure 5 This is a schematic diagram of the reset circuit connection of the control module;

[0024] Figure 6 This is a schematic diagram of the control module's program update circuit connection;

[0025] Figure 7 This is a schematic diagram of the crystal oscillator circuit connection of the control module;

[0026] Figure 8 This is a schematic diagram of the decoupling capacitor circuit connection placed close to the control module;

[0027] Figure 9 This is a circuit connection diagram of the sound card power supply control module provided by this application;

[0028] Figure 10 This is a circuit connection diagram of the power amplifier power supply control module provided by this application;

[0029] Figure 11 This is a circuit connection diagram of the sound card module provided by this application;

[0030] Figure 12 This is a 5V power supply filter circuit connection diagram provided by this application;

[0031] Figure 13 This is a circuit connection diagram of the power amplifier module provided by this application;

[0032] Figure 14 This is the 3.3V power supply filter circuit connection diagram provided by this application;

[0033] Figure 15 This is a connection diagram of the mute control circuit of the power amplifier module provided by this application;

[0034] Figure 16 This is a schematic diagram of the target audio signal output circuit connection of the power amplifier module provided by this application;

[0035] Figure 17 This is a schematic diagram of the 18V power supply filter circuit connection of the power amplifier module provided by this application;

[0036] Figure 18 This is the I2C communication circuit connection diagram provided by this application;

[0037] Figure 19This is a schematic diagram of the hub connected to the expansion device provided by this application;

[0038] Figure 20 This is the front panel interface structure diagram provided by this application;

[0039] Figure 21 This is a circuit connection diagram of the hub provided by this application;

[0040] Figure 22 This is a schematic diagram of the mainboard circuit connection provided by this application. DETAILED DESCRIPTION

[0041] In order to have a clearer understanding of the technical features, purposes, and effects of the present application, the specific embodiments of the present application are described in further detail below in conjunction with the accompanying drawings and Examples. The following examples are only used to illustrate the present application, but are not used to limit the scope of protection of the present application. Based on the embodiments of the present application, other embodiments obtained by those skilled in the art without paying creative work should all fall within the scope of protection of the present application.

[0042] In the description of this application, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting this application.

[0043] In the description of this application, it should be understood that the numbers themselves, such as "first", "second", etc., are only used to distinguish the objects described, and have no sequential or technical meaning, and cannot be understood as stipulating or implying the importance of the objects described.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0045] In this application, the term "plurality" refers to two or more than two. Furthermore, the term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0046] In the description of this application, it should be noted that, unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by those skilled in the art. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. Those of ordinary skill in the art will understand the specific meanings of the above terms in this application in specific circumstances.

[0047] Currently, interactive large-screen sound card and amplifier systems generally use an onboard design, where the sound card and amplifier circuits are soldered directly onto the motherboard. This approach simplifies circuit connections to a certain extent, but in practice, especially for products with special requirements for sound quality, the onboard design limits product customization and scalability, and it is impossible to flexibly adjust amplifier parameters to optimize sound quality according to different customer needs.

[0048] In order to solve the above technical problems, the present application provides a sound card power amplifier adjustment circuit 10, see Figure 1 As shown, the sound card power amplifier regulation circuit 10 includes a control module 101, a sound card power supply control module 102, a power amplifier power supply control module 103, a sound card module 104, a power amplifier module 105 and a hub module 106. The control module 101 is electrically connected to the sound card power supply control module 102, the power amplifier power supply control module 103, the sound card module 104 and the power amplifier module 105 respectively. The sound card power supply control module 102 is electrically connected to the sound card module 104, the power amplifier power supply control module 103 is electrically connected to the power amplifier module 105, the sound card module 104 is electrically connected to the hub module 106 and the power amplifier module 105 respectively, and the hub module 106 is used to be electrically connected to the mainboard 20.

[0049] Specifically, the control module 101 outputs a first control signal to the sound card power supply control module 102, so that the sound card power supply control module 102 supplies power to the sound card module 104. At this time, if the sound card module 104 does not receive the first audio signal output by the mainboard 20 through the hub module 106, the sound card module 104 will not start working. Only when the sound card module 104 receives the first audio signal output by the mainboard 20 through the hub module 106 will it output a first level signal to the control module 101 and output a second audio signal to the power amplifier module 105. The control module 101 outputs a second control signal to the power amplifier power supply control module 103 according to the first level signal, so that the power amplifier power supply control module 103 supplies power to the power amplifier module 105. The power amplifier module 105 can configure the second audio signal according to the configuration file output by the control module 101, and finally output the target audio signal. As can be seen, the sound card amplifier adjustment circuit 10 provided in the embodiment of the present application, by providing a control module 101, a sound card module 104, and a power amplifier module 105, can adjust the power amplifier parameters, thereby optimizing the audio output quality as needed. This design allows the user or system to dynamically adjust the power amplifier parameters according to different audio content and usage environments to achieve higher sound quality.

[0050] It should be noted that the interactive large-screen sound card amplifier system in the prior art usually adopts an onboard design, but this design has some problems. First, the assembly efficiency of the onboard design is low and is not suitable for rapid mass production. Secondly, once disassembly or maintenance is required, the operation becomes very difficult, which brings inconvenience to the user and increases maintenance costs. In order to solve these problems, the present application proposes a sound card amplifier adjustment circuit 10, in which the control module 101, the sound card module 104 and the amplifier module 105 are all placed on the outside of the mainboard 20 and assembled on the lower side of the interactive large screen. The hub module 106 can be used to be more easily installed and connected, thereby improving assembly efficiency. And users or maintenance personnel can access and replace these modules individually without disassembling the entire interactive large screen.

[0051] In one embodiment of the present application, Figure 2 As shown, the control module 101 includes a processing chip U1 , which is electrically connected to the sound card power supply control module 102 , the power amplifier power supply control module 103 , the sound card module 104 and the power amplifier module 105 .

[0052] Specifically, the processing chip U1 can output a first control signal to the sound card power supply control module. The processing chip U1 can also output a second control signal to the power amplifier power supply control module 103 based on the first level signal output by the sound card module 104 to power on the power amplifier module 105. The processing chip U1 can also output a configuration file to the power amplifier module 105 to configure the power amplifier module 105.

[0053] For example, the model of the processing chip U1 can be GD32F303CCT6, wherein PIN13 is connected to the sound card module 104 for receiving a first level signal (such as a high level signal) output by the sound card module 104, PIN14 is connected to the power amplifier power supply control module 103 for outputting a second control signal to the power amplifier power supply control module 103, and PIN15 is connected to the sound card power supply control module 102 for outputting a first control signal to the sound card power supply control module 102. PIN42 and PIN43 are connected to the power amplifier module 105 for outputting a configuration file to the power amplifier module 105.

[0054] It should be noted that this application also provides peripheral circuits connected to other pins of the GD32F303CCT6 chip. Figure 3 This is the indicator light circuit of the GD32F303CCT6 chip. Figure 4 It is the debugging circuit of GD32F303CCT6 chip. Figure 5 This is the reset circuit of the GD32F303CCT6 chip. Figure 6 It is the program update circuit of GD32F303CCT6 chip. Figure 7 This is the crystal oscillator circuit of the GD32F303CCT6 chip. Figure 8 The decoupling capacitor circuit is placed close to the GD32F303CCT6 chip. The peripheral circuits connected to other pins of the GD32F303CCT6 chip are all existing circuit structures and will not be described in detail here. Figures 3 to 8 The connection relationship, corresponding models and parameters of the resistors and capacitors set in can be obtained according to the circuit diagram shown, and will not be described in detail here.

[0055] In one embodiment of the present application, Figure 9 As shown, the sound card power supply control module 102 includes a first resistor R1, a second resistor R2, a first switch tube Q1 and a first transistor Q2. The first end of the first resistor R1 is electrically connected to the source of the first switch tube Q1 and the first power supply respectively, and the second end of the first resistor R1 is electrically connected to the gate of the first switch tube Q1 and the collector of the first transistor Q2 respectively. The first end of the second resistor R2 is electrically connected to the control module 101, and the second end of the second resistor R2 is electrically connected to the base of the first transistor Q2. The drain of the first switch tube Q1 is electrically connected to the sound card module 104, and the emitter of the first transistor Q2 is grounded.

[0056] Specifically, the first switch Q1 and the first transistor Q2 both function as switching devices, capable of being turned on or off, thereby controlling the power supply to the sound card module 104. A first resistor R1 is connected between the source and gate of the first switch Q1 to provide a bias voltage, ensuring stable operation of the first switch Q1. By adjusting the value of the first resistor R1, the current from the source to the gate can be controlled, thereby controlling the degree of conduction of the first switch Q1. Furthermore, when the first switch Q1 is not conducting, the first resistor R1 between the source and gate prevents excessive voltage due to charge accumulation, thereby protecting the first switch Q1 from damage. A second resistor R2 is connected to the base of the first transistor Q2 to limit current, preventing damage to the first transistor Q2 caused by transient current. The specific operating principle of the sound card power supply control circuit is as follows: when the base of the first transistor Q2 receives a high-level first control signal output by the PWREN2 pin of the processing chip U1, the first transistor Q2 is turned on, i.e., conduction is established between the collector and emitter of the first transistor Q2. When the first transistor Q2 is turned on, the gate of the first switch Q1 is grounded, and the gate-source voltage (VGS) of the first switch Q1 reaches the turn-on voltage of the first switch Q1. At this time, the first switch Q1 is turned on, that is, the source and drain of the first switch Q1 are conductive, and the first power supply can supply power to the sound card module 104. Conversely, if the first control signal output by the PWREN2 pin of the processing chip U1 received by the base of the first transistor Q2 is a low-level signal, the first transistor Q2 and the first switch Q1 are both disconnected, and the first power supply cannot supply power to the sound card module 104.

[0057] For example, the first power supply can be 5V, and the power supply of the sound card module 104 is 5V. The resistance value and model of the first resistor R1 and the second resistor R2 can be selected. For example, the resistance value of the first resistor R1 is 10k ohms, the resistance value of the second resistor R2 is 1k ohm, and the model of the first resistor R1 and the second resistor R2 can both be selected as R0603. The type and model of the first switch tube Q1 can be selected. For example, the first switch tube Q1 can be a PMOS tube, and the model of the first switch tube Q1 can be AO3401. The type and model of the first transistor Q2 can be selected. For example, the first transistor Q2 can be an NPN transistor, and the model of the first transistor Q2 can be 2N3904.

[0058] In one embodiment of the present application, Figure 10As shown, the power amplifier power supply control module 103 includes a third resistor R3, a fourth resistor R4, a second switch tube Q3 and a second transistor Q4. The first end of the third resistor R3 is electrically connected to the source of the second switch tube Q3 and the second power supply, respectively. The second end of the third resistor R3 is electrically connected to the gate of the second switch tube Q3 and the collector of the second transistor Q4, respectively. The first end of the fourth resistor R4 is electrically connected to the control module 101, the second end of the fourth resistor R4 is electrically connected to the base of the second transistor Q4, the drain of the second switch tube Q3 is electrically connected to the power amplifier module 105, and the emitter of the second transistor Q4 is grounded.

[0059] Specifically, the second switch Q3 and the second transistor Q4 both function as switching devices, capable of being turned on or off, thereby controlling the power supply to the power amplifier module 105. A third resistor R3 is connected between the source and gate of the second switch Q3 to provide a bias voltage, ensuring stable operation of the second switch Q3. By adjusting the value of the third resistor R3, the current from the source to the gate can be controlled, thereby controlling the degree of conduction of the second switch Q3. Furthermore, when the second switch Q3 is not conducting, the third resistor R3 between the source and gate prevents excessive voltage due to charge accumulation, thereby protecting the second switch Q3 from damage. A fourth resistor R4 is connected to the base of the second transistor Q4 to limit current, preventing damage to the second transistor Q4 caused by transient currents. The specific operating principle of the power amplifier power supply control circuit is as follows: when the base of the second transistor Q4 receives a high-level second control signal output by the PWREN1 pin of the processing chip U1, the second transistor Q4 is turned on, i.e., conduction is established between the collector and emitter of the second transistor Q4. When the second transistor Q4 is turned on, the gate of the second switch Q3 is grounded, and the gate-source voltage (VGS) of the second switch Q3 reaches the turn-on voltage of the second switch Q3. At this time, the second switch Q3 is turned on, that is, the source and drain of the second switch Q3 are conductive, and the second power supply can supply power to the power amplifier module 105. Conversely, if the second control signal output by the PWREN1 pin of the processing chip U1 received by the base of the second transistor Q4 is a low-level signal, the second transistor Q4 and the second switch Q3 are both in the off state, and the second power supply cannot supply power to the power amplifier module 105.

[0060] Exemplarily, the second power supply can be 3.3V, and the power supply of the power amplifier module 105 is 3.3V. The resistance value and model of the third resistor R3 and the fourth resistor R4 can be selected. For example, the resistance value of the third resistor R3 is 10k ohms, the resistance value of the fourth resistor R4 is 1k ohms, and the model of the third resistor R3 and the fourth resistor R4 can both be selected as R0603. The type and model of the second switch tube Q3 can be selected. For example, the second switch tube Q3 can be a PMOS tube, and the model of the second switch tube Q3 can be AO3401. The type and model of the second transistor Q4 can be selected. For example, the second transistor Q4 can be an NPN transistor, and the model of the second transistor Q4 can be 2N3904.

[0061] In one embodiment of the present application, Figure 11 As shown, the sound card module 104 includes a sound card chip U2, the power end of the sound card chip U2 is electrically connected to the sound card power supply control module 102, the input end of the sound card chip U2 is electrically connected to the hub module 106, the first output end of the sound card chip U2 is electrically connected to the control module 101, and the second output end of the sound card chip U2 is electrically connected to the power amplifier module 105.

[0062] Specifically, the sound card chip U2 can receive the power output by the sound card power supply control module 102 and be powered on. The sound card chip U2 can also receive the first audio signal output by the motherboard 20 through the hub module 106, perform noise suppression and equalization on the first audio signal, and then output a first level signal (e.g., a high level signal) to the control module 101, and output a second audio signal to the power amplifier module 105.

[0063] For example, the model of the sound card chip U2 can be AD62556, wherein PIN36 is connected to the sound card power supply control module 102 for receiving the 5V voltage output by the sound card power supply control module 102. PIN37 and PIN38 are both used to receive the first audio signal output by the motherboard 20 through the hub module 106. PIN40 to PIN42 are all connected to the power amplifier module 105 for transmitting the processed second audio signal to the power amplifier module 105. PIN24 is connected to PIN13 of the processing chip U1 for outputting a first level signal (a high level signal or a low level signal) to the processing chip U1.

[0064] It should be noted that in Figure 11 The connection relationship, corresponding models and parameters of the resistors and capacitors set on other pins can be obtained according to the circuit diagram shown, and will not be described in detail here.

[0065] It should be noted that if Figure 12 As shown, a 5V power supply filter circuit is provided between the sound card power supply control module 102 and the sound card chip U2. Figure 12 The connection relationship, corresponding models and parameters of the resistors and capacitors set in can be obtained according to the circuit diagram shown, and will not be described in detail here.

[0066] In one embodiment of the present application, Figure 13 As shown, the power amplifier module 105 includes a power amplifier chip U3, the power supply end of the power amplifier chip U3 is electrically connected to the power amplifier power supply control module 103, the first input end of the power amplifier chip U3 is electrically connected to the sound card module 104, the second input end of the power amplifier chip U3 is electrically connected to the control module 101, and the output end of the power amplifier chip U3 is used to output the target audio signal.

[0067] Specifically, the power amplifier chip U3 can receive the power output by the power amplifier power supply control module 103 and power on. The power amplifier chip U3 can also receive the second audio signal output by the sound card chip U2 and the configuration file output by the processing chip U1, thereby configuring the second audio signal and outputting the target audio signal.

[0068] For example, the model of power amplifier chip U3 can be AD82088D. PIN9 is connected to power amplifier power control module 103 to receive the 3.3V voltage output by power amplifier power control module 103. PIN3-PIN5 are connected to the corresponding pins PIN40-PIN42 of sound card chip U2 to receive the second audio signal output by sound card chip U2. PIN6 and PIN7 are connected to PIN42 and PIN43 of processing chip U1 to receive the configuration file output by processing chip U1.

[0069] It should be noted that in Figure 13 The connection relationship, corresponding models and parameters of the resistors and capacitors set on other pins can be obtained according to the circuit diagram shown, and will not be described in detail here.

[0070] It should be noted that if Figure 14 As shown, a 3.3V power supply filter circuit is provided between the power amplifier power supply control module 103 and the power amplifier chip U3. Figure 14 The connection relationship, corresponding models and parameters of the resistors and capacitors set in can be obtained according to the circuit diagram shown, and will not be described in detail here.

[0071] It should be noted that this application also provides peripheral circuits connected to other pins of the AD82088D chip. Figure 15 This is the mute control circuit of the AD82088D chip. Figure 16 It is the target audio signal output circuit of AD82088D chip. Figure 17This is the 18V power supply filter circuit of the AD82088D chip. The peripheral circuits connected to other pins of the AD82088D chip are all existing circuit structures and will not be described in detail here. Figures 15 to 17 The connection relationship, corresponding models and parameters of the resistors and capacitors set in can be obtained according to the circuit diagram shown, and will not be described in detail here.

[0072] In one embodiment of the present application, after the control module 101 outputs the second control signal to the power amplifier power supply control module 103 for a preset time, the control module 101 outputs the configuration file to the power amplifier module 105 via I2C.

[0073] Specifically, since the control module 101 outputs the second control signal to the power amplifier power supply control module 103 so that the power amplifier power supply control module 103 supplies power to the power amplifier module 105, this process takes a certain amount of time. Therefore, the control module 101 needs to ensure that the power supply to the power amplifier module 105 is stable, that is, after a preset time, the control module 101 outputs the configuration file to the power amplifier module 105, thereby ensuring the stability of the power amplifier module 105 and improving the reliability and stability of the sound card power amplifier regulation circuit 10.

[0074] It should be noted that the I2C communication and data transmission circuit is as follows Figure 18 As shown, PIN42 and PIN43 of the processing chip U1 are I2C communication pins, which are electrically connected to the power amplifier module 105. Among them, the mainboard 20, the processing chip U1, the sound card module 104 and the power amplifier module 105 are all connected by I2C communication.

[0075] In one embodiment of the present application, the hub module 106 includes a hub, which is electrically connected to the mainboard 20 and the sound card module 104 respectively.

[0076] Specifically, the hub is a device that can connect multiple Ethernet twisted pair cables or optical fibers to the same physical medium. It is connected between the motherboard 20 and the sound card module 104 and can transmit the first audio signal output by the motherboard 20 to the sound card module 104.

[0077] It should be noted that if Figure 19 As shown, the hub can connect to other expansion devices, such as the front panel, audio board, NFC (Near Field Communication, short-range wireless communication technology), etc. Figure 20 As shown, it contains multiple pins. Figure 21 The diagram shows the circuit connection diagram of the hub, which includes the hub chip U5 and the peripheral circuits connected to the pins of the hub chip U5. Among them, J2 is the front panel power supply interface, J3 is the audio board interface, and J4 is the NFC interface. Figure 21The connection relationship, corresponding models and parameters of the resistors and capacitors set in can be obtained according to the circuit diagram shown, and will not be described in detail here.

[0078] The present application also discloses a sound card power amplifier adjustment system, including a mainboard 20 and the above-mentioned sound card power amplifier adjustment circuit 10 , wherein the mainboard 20 is electrically connected to the control module 101 and the sound card module 104 in the sound card power amplifier adjustment circuit 10 .

[0079] Specifically, the mainboard 20 circuit is as follows Figure 22 As shown, the motherboard 20 can provide power, that is, can output a power-on signal. The motherboard 20 can also perform data transmission, that is, output a first audio signal to the sound card module 104 through the hub module 106 .

[0080] It should be noted that the motherboard 20 is also used to electrically connect to the control module 101, the sound card power control module 102, the power amplifier power control module 103, and the power amplifier module 105 to provide power to these operating modules. The motherboard 20 is also electrically connected to the power amplifier module 105 via other pins (such as I2C) to achieve communication and data transmission.

[0081] The present application also discloses an interactive large screen, including the above-mentioned sound card amplifier adjustment system. The interactive large screen adopts the above-mentioned sound card amplifier adjustment system, which can allow users to dynamically adjust the amplifier parameters according to different audio content and usage environment to achieve higher sound quality effects, so that the interactive large screen can be suitable for various environments and provide more interactive possibilities.

[0082] Since the processing and functions implemented by the interactive large screen in this embodiment basically correspond to the embodiments, principles and examples of the aforementioned sound card power amplifier adjustment circuit, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0083] The above is only a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. It should be pointed out that for those skilled in the art, without departing from the technical principles of the present application, several equivalent obvious variations and / or equivalent replacements can be made, and these obvious variations and / or equivalent replacements should also be regarded as within the scope of protection of the present application.

Claims

1. A sound card power amplifier adjustment circuit, characterized in that: The system comprises a control module, a sound card power supply control module, a power amplifier power supply control module, a sound card module, a power amplifier module and a hub module, wherein the control module is electrically connected to the sound card power supply control module, the power amplifier power supply control module, the sound card module and the power amplifier module respectively, the sound card power supply control module is electrically connected to the sound card module, the power amplifier power supply control module is electrically connected to the power amplifier module, the sound card module is electrically connected to the hub module and the power amplifier module respectively, and the hub module is used to be electrically connected to the mainboard; The control module is used to output a first control signal to the sound card power supply control module; the sound card power supply control module is used to power the sound card module according to the first control signal; the sound card module is used to output a first level signal to the control module when receiving the first audio signal output by the mainboard through the hub module, and output a second audio signal to the power amplifier module; the control module is also used to output a second control signal to the power amplifier power supply control module according to the first level signal; the power amplifier power supply control module is used to power the power amplifier module according to the second control signal; the power amplifier module is used to configure the second audio signal according to the configuration file output by the control module, and output the target audio signal.

2. The sound card power amplifier adjustment circuit according to claim 1, characterized in that: The control module includes a processing chip, and the processing chip is electrically connected to the sound card power supply control module, the power amplifier power supply control module, the sound card module and the power amplifier module respectively.

3. The sound card power amplifier adjustment circuit according to claim 1, characterized in that: The sound card power supply control module includes a first resistor, a second resistor, a first switching tube and a first transistor. The first end of the first resistor is electrically connected to the source of the first switching tube and the first power supply respectively, the second end of the first resistor is electrically connected to the gate of the first switching tube and the collector of the first transistor respectively, the first end of the second resistor is electrically connected to the control module, the second end of the second resistor is electrically connected to the base of the first transistor, the drain of the first switching tube is electrically connected to the sound card module, and the emitter of the first transistor is grounded.

4. The sound card power amplifier adjustment circuit according to claim 1, characterized in that: The power amplifier power supply control module includes a third resistor, a fourth resistor, a second switching tube and a second triode. The first end of the third resistor is electrically connected to the source of the second switching tube and the second power supply, respectively. The second end of the third resistor is electrically connected to the gate of the second switching tube and the collector of the second triode, respectively. The first end of the fourth resistor is electrically connected to the control module, the second end of the fourth resistor is electrically connected to the base of the second triode, the drain of the second switching tube is electrically connected to the power amplifier module, and the emitter of the second triode is grounded.

5. The sound card power amplifier adjustment circuit according to claim 1, characterized in that: The sound card module includes a sound card chip, a power supply end of the sound card chip is electrically connected to the sound card power supply control module, an input end of the sound card chip is electrically connected to the hub module, a first output end of the sound card chip is electrically connected to the control module, and a second output end of the sound card chip is electrically connected to the power amplifier module.

6. The sound card power amplifier adjustment circuit according to claim 1, characterized in that: The power amplifier module includes a power amplifier chip, the power supply end of the power amplifier chip is electrically connected to the power amplifier power supply control module, the first input end of the power amplifier chip is electrically connected to the sound card module, the second input end of the power amplifier chip is electrically connected to the control module, and the output end of the power amplifier chip is used to output the target audio signal.

7. The sound card power amplifier adjustment circuit according to claim 1, characterized in that: After the control module outputs the second control signal to the power amplifier power supply control module for a preset time, the control module outputs the configuration file to the power amplifier module through I2C.

8. The sound card power amplifier adjustment circuit according to claim 1, characterized in that: The hub module includes a hub, and the hub is electrically connected to the mainboard and the sound card module respectively.

9. A sound card power amplifier adjustment system, characterized in that: The device comprises a mainboard and the sound card power amplifier regulating circuit according to any one of claims 1 to 8, wherein the mainboard is electrically connected to the hub module in the sound card power amplifier regulating circuit; The mainboard is used to output a power-on signal, and is also used to output a first audio signal to the hub module.

10. An interactive large screen, characterized in that: Including the sound card power amplifier adjustment system as described in claim 9.

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