Sound system

Abstract

The utility model discloses a sound system, and relates to the technical field of sound. According to the main technical scheme, the circuit comprises a signal input module, a main control module, a pre-stage amplification module, a power amplification module, a pre-stage power supply module, a power supply module and a switch module, wherein the main control module is connected with the signal input module; the pre-amplification module is connected with the main control module; the power amplification module is connected with the main control module, the pre-stage amplification module and the audio driving unit; the pre-stage power supply module is connected with the signal input module and the pre-stage amplification module; the power module is used for being connected with a power supply battery, and the power module is connected with the preceding-stage power supply module, the main control module and the signal input module; the switch module is connected with the main control module and the power supply module. Wherein the main control module can automatically adjust audio parameters according to different use scenes, so as to achieve the purpose of providing a better sound effect. Meanwhile, the signal input module can be conveniently connected with various input devices, so that the purpose of meeting the use requirements of diversified devices is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sound equipment, specifically relates to a sound system. BACKGROUND

[0002] As a device that can convert audio signals into sound, sound equipment plays a crucial role in modern life.

[0003] With the rapid development of home entertainment and live streaming industry, people have higher requirements for the performance and function of sound equipment. However, the existing sound equipment has certain limitations in sound quality, function and applicability, which is difficult to meet the diversified needs of home entertainment and live streaming. SUMMARY

[0004] The utility model aims at providing a sound system, which solves the problem that the existing sound equipment has certain limitations in sound quality, function and applicability, and is difficult to meet the diversified needs of home entertainment and live streaming.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A sound system includes a signal input module, a main control module, a pre-stage amplification module, a power amplification module, a pre-stage power supply module, a power module and a switch module. The input end of the signal input module is used for signal access. The input end of the main control module is connected with the output end of the signal input module. The input end of the pre-stage amplification module is connected with the output end of the main control module. The input end of the power amplification module is connected with the output end of the main control module and the output end of the pre-stage amplification module. The output end of the power amplification module is used for connection with an audio driving unit. The output end of the pre-stage power supply module is connected with the input end of the signal input module and the input end of the pre-stage amplification module. The input end of the power module is used for power supply battery. The output end of the power module is connected with the input end of the pre-stage power supply module, the input end of the main control module and the input end of the signal input module. The switch module is connected with the main control module, and the input end of the switch module is connected with the output end of the power module.

[0007] Further technical scheme is that the signal input module includes an HDMI digital audio signal input unit, an analog signal input unit, a Bluetooth signal input unit, a wireless signal input unit and a USB signal input unit.

[0008] The output end of the HDMI digital audio signal input unit, the output end of the analog signal input unit, the output end of the Bluetooth signal input unit, the output end of the wireless signal input unit and the output end of the USB signal input unit are connected with the input end of the main control module.

[0009] The input end of the HDMI digital audio signal input unit is used for accessing an HDMI digital audio signal; the input end of the analog signal input unit is used for accessing an analog signal; the input end of the Bluetooth signal input unit is used for accessing a Bluetooth signal; the input end of the wireless signal input unit is used for accessing a wireless signal; and the input end of the USB signal input unit is used for accessing a USB signal.

[0010] Further, the master control module comprises a digital audio processing chip U13, a diode D2, a resistor R70, an electrolytic capacitor EC10, a capacitor C31, a capacitor C32, a capacitor C35, a capacitor C36, a capacitor C37, a capacitor C40, a capacitor C42, a capacitor C43 and a ferrite magnet FB9.

[0011] The digital audio processing chip U13 is BP1048B1.

[0012] The No. 2 pin of the digital audio processing chip U13 is connected with one end of the resistor R70, the positive electrode of the electrolytic capacitor EC10, one end of the capacitor C40 and one end of the capacitor C42; the negative electrode of the electrolytic capacitor EC10, the other end of the capacitor C40 and the other end of the capacitor C42 are all connected with GND; the other end of the resistor R70 is connected with the negative electrode of the diode D2; the positive electrode of the diode D2 is connected with the output end of the power module.

[0013] The No. 5 pin and the No. 24 pin of the digital audio processing chip U13 are both connected with the output end of the switch module.

[0014] The No. 6 pin, the No. 7 pin, the No. 31 pin, the No. 32 pin, the No. 35 pin and the No. 38 pin of the digital audio processing chip U13 are all connected with the output end of the HDMI digital audio signal input unit.

[0015] The No. 8 pin, the No. 20 pin, the No. 21 pin, the No. 28 pin, the No. 29 pin and the No. 30 pin of the digital audio processing chip U13 are all connected with the output end of the wireless signal input unit.

[0016] The No. 8 pin, the No. 28 pin, the No. 29 pin and the No. 36 pin of the digital audio processing chip U13 are all connected with the output end of the analog signal input unit.

[0017] The No. 10 pin of the digital audio processing chip U13 and one end of the ferrite magnet FB9 are both connected with D3V3.

[0018] The No. 10 pin of the digital audio processing chip U13 is connected with one end of the capacitor C35, one end of the capacitor C36 and one end of the capacitor C43; and the other end of the capacitor C36 is connected with GND.

[0019] The pin 12 of the digital audio processing chip U13 is connected with the other end of the capacitor C35 and the other end of the capacitor C43, and the pin 12 of the digital audio processing chip U13 is connected with GND;

[0020] The pin 11 of the digital audio processing chip U13 is connected with the output end of the Bluetooth signal input unit;

[0021] The pin 13 of the digital audio processing chip U13 is connected with the other end of the ferrite magnet FB9, one end of the capacitor C31 and one end of the capacitor C37, and the other end of the capacitor C31, the other end of the capacitor C37 and one end of the capacitor C32 are connected with GND;

[0022] The pin 14 of the digital audio processing chip U13 is connected with the other end of the capacitor C32;

[0023] The pin 18 and the pin 19 of the digital audio processing chip U13 are connected with the input end of the power amplification module;

[0024] The pin 26 and the pin 27 of the digital audio processing chip U13 are connected with the output end of the USB signal input unit;

[0025] The pin 46 and the pin 47 of the digital audio processing chip U13 are connected with the input end of the pre-stage amplification module.

[0026] Further, the pre-stage amplification module comprises an operational amplifier U6-A, an operational amplifier U6-B, a capacitor C3, a resistor R10, a resistor R2, a resistor R11, a capacitor C2, a capacitor C1, a resistor R3, a resistor R1, a capacitor C9, a resistor R13, a capacitor C8, a resistor R16, a resistor R8, a resistor R17, a capacitor C5, a resistor R9, a capacitor C4, a resistor R7, a capacitor C10, a resistor R14, a capacitor C94, a capacitor C95, a capacitor C101 and a capacitor C64;

[0027] One end of the capacitor C3 is connected with the pin 46 of the digital audio processing chip U13, and the other end of the capacitor C3 is connected with one end of the resistor R10;

[0028] The other end of the resistor R10 is connected with one end of the resistor R2, one end of the resistor R11 and one end of the capacitor C2;

[0029] The other end of the resistor R2, one end of the resistor R3 and one end of the capacitor C1 are connected with the pin 2 of the operational amplifier U6-A;

[0030] The other end of the resistor R3, the other end of the capacitor C1 and one end of the resistor R1 are connected with the pin 1 of the operational amplifier U6-A;

[0031] One end of the capacitor C8 is connected with the No. 47 pin of the digital audio processing chip U13, and the other end of the capacitor C8 is connected with one end of the resistor R16;

[0032] The other end of the resistor R16 is connected with one end of the resistor R8, one end of the resistor R17 and one end of the capacitor C5;

[0033] The other end of the resistor R8, one end of the resistor R9 and one end of the capacitor C4 are all connected with the No. 6 pin of the operational amplifier U6-B;

[0034] The other end of the resistor R9, the other end of the capacitor C4 and one end of the resistor R7 are all connected with the No. 7 pin of the operational amplifier U6-B;

[0035] The other end of the resistor R1, one end of the capacitor C9, one end of the resistor R13, the other end of the resistor R7, one end of the capacitor C10 and one end of the resistor R14 are all connected with the input end of the power amplification module;

[0036] The No. 4 pin and the No. 8 pin of the operational amplifier U6-A, one end of the capacitor C94, one end of the capacitor C95, one end of the capacitor C101 and one end of the capacitor C64 are all connected with the output end of the front-stage power supply module;

[0037] The other end of the resistor R11, the other end of the capacitor C2, the No. 3 pin of the operational amplifier U6-A, the other end of the capacitor C9, the other end of the resistor R13, the other end of the capacitor C10, the other end of the resistor R14, the other end of the resistor R17, the other end of the capacitor C5, the No. 5 pin of the operational amplifier U6-A, the other end of the capacitor C94, the other end of the capacitor C95, the other end of the capacitor C101 and the other end of the capacitor C64 are all grounded.

[0038] The power amplification module further comprises an audio amplifier IC104, a resistor R15, a triode Q2, a resistor R20, a resistor R172, a capacitor C59, a capacitor C108, a resistor R170, a capacitor C179, an inductor L5, a capacitor C97, a capacitor C196, a resistor R197, a capacitor C199, a capacitor C178, an inductor L1, a capacitor C102, a capacitor C103, a resistor R29, a capacitor C107, a capacitor C177, an inductor L6, a capacitor C58, a capacitor C195, a resistor R25, a capacitor C106, a capacitor C176, an inductor L3, a capacitor C104, a capacitor C105, a resistor R196 and a capacitor C198;

[0039] The audio amplifier IC104 is TPA3116D;

[0040] One end of the resistor R15 is connected with the pin 18 of the digital audio processing chip U13;

[0041] The base of the transistor Q2 is connected with the other end of the resistor R15, the emitter of the transistor Q2 is grounded, and the collector of the transistor Q2 is connected with one end of the resistor R20;

[0042] The other end of the resistor R20 is connected with one end of the resistor R172, the pin 2 of the audio amplifier IC104, and the pin 3 of the audio amplifier IC104;

[0043] The other end of the resistor R72 is connected with 24V+;

[0044] One end of the capacitor C59 is connected with the other end of the resistor R1, one end of the capacitor C9, and one end of the resistor R13, and the other end of the capacitor C59 is connected with the pin 4 of the audio amplifier IC104;

[0045] One end of the capacitor C108 is connected with the other end of the resistor R7, one end of the capacitor C10, and one end of the resistor R14, and the other end of the capacitor C108 is connected with the pin 10 of the audio amplifier IC104;

[0046] One end of the resistor R170 is connected with the pin 19 of the digital audio processing chip U13, and the other end of the resistor R170 is connected with the pin 12 of the audio amplifier IC104;

[0047] One end of the capacitor C176 is connected with the pin 20 of the audio amplifier IC104, and the other end of the capacitor C176 is connected with the pin 21 of the audio amplifier IC104 and one end of the inductor L3;

[0048] The other end of the inductor L3 is connected with one end of the capacitor C104, one end of the capacitor C105, and one end of the resistor R196, and the other end of the inductor L3 is used for connecting with an audio driving unit;

[0049] The other end of the resistor R196 is connected with one end of the capacitor C198;

[0050] One end of the capacitor C177 is connected with the pin 24 of the audio amplifier IC104, and the other end of the capacitor C177 is connected with the pin 23 of the audio amplifier IC104 and one end of the inductor L6;

[0051] The other end of the inductor L6 is connected with one end of the capacitor C58, one end of the capacitor C195, and one end of the resistor R25, and the other end of the inductor L6 is used for connecting with an audio driving unit;

[0052] The other end of the resistor R25 is connected with one end of the capacitor C106;

[0053] One end of the capacitor C178 is connected with pin 26 of the audio amplifier IC104, and the other end of the capacitor C178 is connected with pin 27 of the audio amplifier IC104 and one end of the inductor L1;

[0054] The other end of the inductor L1 is connected with one end of the capacitor C102, one end of the capacitor C103 and one end of the resistor R29, and the other end of the inductor L1 is used for connecting with the audio driving unit;

[0055] The other end of the resistor R29 is connected with one end of the capacitor C107;

[0056] One end of the capacitor C179 is connected with pin 30 of the audio amplifier IC104, and the other end of the capacitor C179 is connected with pin 29 of the audio amplifier IC104 and one end of the inductor L5;

[0057] The other end of the inductor L5 is connected with one end of the capacitor C97, one end of the capacitor C196 and one end of the resistor R197, and the other end of the inductor L5 is used for connecting with the audio driving unit;

[0058] The other end of the resistor R197 is connected with one end of the capacitor C199;

[0059] The other end of the capacitor C104, the other end of the capacitor C105, the other end of the capacitor C58, the other end of the capacitor C195, the other end of the capacitor C102, the other end of the capacitor C103, the other end of the capacitor C97, the other end of the capacitor C196, the other end of the capacitor C198, the other end of the capacitor C106, the other end of the capacitor C107 and the other end of the capacitor C199 are grounded.

[0060] A further technical solution is that the front-stage power supply module comprises a voltage stabilizing chip U302, a resistor R305, an electrolytic capacitor C308, a capacitor C307, a resistor R307, a resistor R308, an inductor L302, a diode D305, an electrolytic capacitor C310, a diode D302, an electrolytic capacitor C311, a capacitor C312, a diode D303, a diode D304, a capacitor C313, an electrolytic capacitor C314, a capacitor C315, a resistor R309 and a resistor R306;

[0061] The voltage stabilizing chip U302 is XL6007;

[0062] One end of the resistor R305 is connected with the output end of the power supply module;

[0063] The No. 2 pin of the voltage stabilizing chip U302 is connected with the other end of the resistor R305, the positive pole of the electrolytic capacitor C308, the one end of the capacitor C307 and the one end of the inductor L302;

[0064] The other end of the inductor L302 is connected with the No. 5 pin of the voltage stabilizing chip U302, the No. 6 pin of the voltage stabilizing chip U302, the positive pole of the electrolytic capacitor C310 and the negative pole of the diode D302;

[0065] The No. 3 pin of the voltage stabilizing chip U302 is connected with the one end of the resistor R307 and the one end of the resistor R308;

[0066] The negative pole of the electrolytic capacitor C308, the other end of the capacitor C307, the other end of the resistor R307 and the positive pole of the diode D305 are grounded;

[0067] The other end of the resistor R308 is connected with the positive pole of the diode D302, the positive pole of the electrolytic capacitor C311, the one end of the capacitor C312 and the positive pole of the diode D303;

[0068] The negative pole of the electrolytic capacitor C310 and the negative pole of the diode D305 are connected with the positive pole of the diode D304;

[0069] The negative pole of the diode D304 is connected with the positive pole of the electrolytic capacitor C314, the one end of the capacitor C315 and the one end of the resistor R305, and the negative pole of the diode D304 is also connected with the No. 4 pin of the operational amplifier U6-A, the No. 4 pin of the operational amplifier U6-A, the one end of the capacitor C94 and the one end of the capacitor C101;

[0070] The negative pole of the electrolytic capacitor C314, the other end of the capacitor C314, the negative pole of the electrolytic capacitor C311, the other end of the capacitor C31, the one end of the capacitor C313 and the one end of the resistor R309 are connected with GND;

[0071] The negative pole of the diode D303 is connected with the other end of the capacitor C313, the other end of the resistor R309 and the other end of the resistor R306, and the negative pole of the diode D303 is also connected with the No. 8 pin of the operational amplifier U6-A, the No. 8 pin of the operational amplifier U6-A, the one end of the capacitor C95 and the one end of the capacitor C64.

[0072] Further technical solutions are: the power module includes diode D15, resistor R51, resistor R50, triode Q1, MOS tube Q3, resistor R48, resistor R49, Schottky diode Q12, capacitor C124, resistor R53, capacitor C125, resistor R57, electrolytic capacitor EC4, capacitor C123, common mode inductor L7, power chip U5, capacitor C112, capacitor C73, electrolytic capacitor EC7, inductor L2, capacitor C116, capacitor C118, electrolytic capacitor EC9, capacitor C117, resistor R135, resistor R134, resistor R138, resistor R137, resistor R136 and capacitor C120;

[0073] The positive electrode of the diode D15 is used for connecting POWER;

[0074] The negative electrode of the diode is connected with one end of the resistor R51;

[0075] One end of the resistor R50 is used for connecting AC, and the other end of the resistor R50 and the other end of the resistor R51 are connected with the base of the triode Q1;

[0076] The base of the triode Q1 is used for connecting RESET;

[0077] The emitter of the triode Q1 is connected with GND;

[0078] The collector of the triode Q1 is connected with one end of the resistor R49 and one positive electrode of the Schottky diode Q12;

[0079] The other positive electrode of the Schottky diode Q12 is connected with one end of the capacitor C124, and the other positive electrode of the Schottky diode Q12 is connected with the input end of the switch module;

[0080] The other end of the capacitor C124 is connected with GND;

[0081] The negative electrode of the Schottky diode Q12 is connected with the input end of the switch module;

[0082] The other end of the resistor R49 is connected with one end of the resistor R48 and the gate of the MOS tube Q3;

[0083] The other end of the resistor R48 and the source of the MOS tube Q3 are used for connecting the power supply battery;

[0084] The drain of the MOS tube Q3 is connected with one end of the resistor R53, the positive electrode of the electrolytic capacitor EC4, one end of the capacitor C123 and the No.1 pin of the common mode inductor L7, and the drain of the MOS tube Q3 is used for connecting VB;

[0085] The other end of the resistor R53, one end of the capacitor C125, and one end of the resistor R57 are connected to BAT_DET;

[0086] The other end of the capacitor C125, the other end of the resistor R57, the negative electrode of the electrolytic capacitor EC4, the other end of the capacitor C123, and the No. 2 pin of the common mode inductor L7 are connected to GND;

[0087] The No. 3 pin of the common mode inductor L7 is connected to ground;

[0088] The No. 4 pin of the common mode inductor L7 is connected to the positive electrode of the electrolytic capacitor EC9, one end of the capacitor C117, the No. 2 pin of the power supply chip U5, and the No. 3 pin of the power supply chip U5;

[0089] The No. 1 pin of the power supply chip U5 is connected to one end of the capacitor C118, one end of the inductor L2, and one end of the capacitor C116;

[0090] The other end of the capacitor C118 is connected to the negative electrode of the electrolytic capacitor EC9, the capacitor C117, the negative electrode of the electrolytic capacitor EC7, one end of the resistor R135, the No. 9 pin of the power supply chip U5, one end of the resistor R137, one end of the resistor R136, one end of the capacitor C120, one end of the capacitor C73, and one end of the capacitor C112;

[0091] The other end of the inductor L2 is connected to the positive electrode of the electrolytic capacitor EC7, the other end of the capacitor C73, one end of the resistor R134, the other end of the capacitor C112, the positive electrode of the diode D2, one end of the resistor R305, the input end of the HDMI digital audio signal input unit, the input end of the analog signal input unit, the input end of the wireless signal input unit, and the input end of the USB signal input unit;

[0092] The other end of the capacitor C116 is connected to the No. 8 pin of the power supply chip U5;

[0093] The other end of the resistor R135 is connected to the No. 4 pin of the power supply chip U5;

[0094] The other end of the resistor R134 is connected to one end of the resistor R138;

[0095] The other end of the resistor R138 and the other end of the resistor R137 are connected to the No. 5 pin of the power supply chip U5;

[0096] The other end of the resistor R136 is connected to the No. 6 pin of the power supply chip U5;

[0097] The other end of the capacitor C120 is connected to the No. 7 pin of the power supply chip U5.

[0098] Further technical solutions are: the switch module includes resistance R56, capacitor C159, resistance R36, resistance R37, key switch S6, resistance R38, key switch S6, resistance R39, key switch S13, resistance R40, key switch S11, resistance R55, key switch S10, resistance R153, key switch S4, volume adjustment knob BM4, resistance R150, resistance R151, resistance R149, resistance R152, capacitor C148 and capacitor C155;

[0099] One end of the resistance R56 is used to connect D3V3, and the other end of the resistance R56 is connected with the No.5 pin of the digital audio processing chip U13, one end of the capacitor C159, one end of the resistance R36, one end of the resistance R37, one end of the resistance R38, one end of the resistance R39, one end of the resistance R40, one end of the resistance R55, and one end of the resistance R153.

[0100] One end of the resistance R36 is connected with the other positive electrode of the Schottky diode Q12.

[0101] The other end of the resistance R37 is connected with one end of the key switch S6.

[0102] The other end of the resistance R38 is connected with one end of the key switch S5.

[0103] The other end of the resistance R39 is connected with one end of the key switch S13.

[0104] The other end of the resistance R40 is connected with one end of the key switch S11.

[0105] The other end of the resistance R55 is connected with one end of the key switch S10.

[0106] The other end of the resistance R153 is connected with one end of the key switch S4.

[0107] The other end of the capacitor C159, the other end of the key switch S6, the other end of the key switch S5, the other end of the key switch S13, the other end of the key switch S11, the other end of the key switch S10, and the other end of the key switch S4 are all connected with GND.

[0108] The No.5 pin of the volume adjustment knob BM4 is connected with the negative electrode of the Schottky diode Q12.

[0109] The No.4 pin of the volume adjustment knob BM4, the No.2 pin of the volume adjustment knob BM4, one end of the capacitor C148, and one end of the capacitor C155 are all connected with GND.

[0110] The other end of the capacitor C148 is connected with one end of the resistance R151.

[0111] The other end of the capacitor C155 is connected with one end of the resistor R152;

[0112] The No. 1 pin of the volume adjusting knob BM4 is connected with the other end of the resistor R151 and one end of the resistor R150;

[0113] The No. 3 pin of the volume adjusting knob BM4 is connected with the other end of the resistor R152 and one end of the resistor R149;

[0114] The other end of the resistor R120 and the other end of the resistor R149 are connected with D3V3.

[0115] Compared with the prior art, the utility model has the advantages of:

[0116] The master control module can automatically adjust audio parameters according to different use scenarios, so as to achieve the purpose of providing better sound effects. Meanwhile, the signal input module is convenient for connecting various input devices, so as to achieve the purpose of meeting the diversified equipment use requirements. BRIEF DESCRIPTION OF DRAWINGS

[0117] Figure 1 It is an electrical block diagram of the sound system in the embodiment;

[0118] Figure 2 It is a circuit structure topology diagram of the master control module for the sound system in the embodiment;

[0119] Figure 3 It is a circuit structure topology diagram of the pre-stage amplification module for the sound system in the embodiment;

[0120] Figure 4 It is a circuit structure topology diagram of the power amplification module for the sound system in the embodiment;

[0121] Figure 5 It is a circuit structure topology diagram of the switch module for the sound system in the embodiment;

[0122] Figure 6 It is a circuit structure topology diagram of the power supply module for the sound system in the embodiment;

[0123] Figure 7 It is a circuit structure topology diagram of the pre-stage power supply module for the sound system in the embodiment;

[0124] Figure 8 It is a Bluetooth signal input unit circuit structure topology diagram of the signal input module for the sound system in the embodiment;

[0125] Figure 9 It is an HDMI digital audio signal input unit circuit structure topology diagram of the signal input module for the sound system in the embodiment;

[0126] Figure 10 A USB signal input unit circuit structure topology diagram of a signal input module for a sound system in the embodiment;

[0127] Figure 11 A wireless signal input unit circuit structure topology diagram of a signal input module for a sound system in the embodiment;

[0128] Figure 12 An analog signal input unit circuit structure topology diagram of a signal input module for a sound system in the embodiment;

[0129] Figure 13 A circuit structure topology diagram of an audio drive unit for a sound system in the embodiment;

[0130] Figure 14 A circuit structure topology diagram of an OTG input unit for a sound system in the embodiment.

[0131] Markings in the drawings and corresponding names of parts:

[0132] 100 - signal input module; 200 - main control module; 300 - pre-stage amplification module; 400 - power amplification module; 500 - pre-stage power supply module; 600 - power module; 700 - switch module. DETAILED DESCRIPTION

[0133] The utility model will be further described below in combination with the drawings.

[0134] EMBODIMENT

[0135] The embodiment provides a sound system, including a signal input module 100, a main control module 200, a pre-stage amplification module 300, a power amplification module 400, a pre-stage power supply module 500, a power module 600 and a switch module 700, the input end of the signal input module 100 is used to access signal;The input end of the main control module 200 is connected with the output end of the signal input module 100;The input end of the pre-stage amplification module 300 is connected with the output end of the main control module 200;The input end of the power amplification module 400 is connected with the output end of the main control module 200 and the output end of the pre-stage amplification module 300, and the output end of the power amplification module 400 is used to be connected with, such as Figure 13The audio driving unit connection shown; the output end of the pre-stage power supply module 500 is connected with the input end of the signal input module 100 and the input end of the pre-stage amplification module 300; the input end of the power module 600 is used for connecting a power supply battery, and the output end of the power module 600 is connected with the input end of the pre-stage power supply module 500, the input end of the main control module 200 and the input end of the signal input module 100; the switch module 700 is connected with the main control module 200, and the input end of the switch module 700 is connected with the output end of the power module 600.

[0136] In the embodiment, the signal input module 100 includes an HDMI digital audio signal input unit as shown in Figure 9 an analog signal input unit as shown in Figure 12 a Bluetooth signal input unit as shown in Figure 8 a wireless signal input unit as shown in Figure 11 and a USB signal input unit as shown in Figure 10 The output end of the HDMI digital audio signal input unit, the output end of the analog signal input unit, the output end of the Bluetooth signal input unit, the output end of the wireless signal input unit and the output end of the USB signal input unit are connected with the input end of the main control module 200; wherein the input end of the HDMI digital audio signal input unit is used for connecting an HDMI digital audio signal; the input end of the analog signal input unit is used for connecting an analog signal; the input end of the Bluetooth signal input unit is used for connecting a Bluetooth signal; the input end of the wireless signal input unit is used for connecting a wireless signal; and the input end of the USB signal input unit is used for connecting a USB signal.

[0137] In the embodiment, the main control module 200 is as shown in Figure 2As shown, it comprises a digital audio processing chip U13, a diode D2, a resistor R70, an electrolytic capacitor EC10, a capacitor C31, a capacitor C32, a capacitor C35, a capacitor C36, a capacitor C37, a capacitor C40, a capacitor C42, a capacitor C43 and a ferrite magnet FB9; the digital audio processing chip U13 is BP1048B1; the No. 2 pin of the digital audio processing chip U13 is connected with one end of the resistor R70, the positive electrode of the electrolytic capacitor EC10, one end of the capacitor C40 and one end of the capacitor C42; the negative electrode of the electrolytic capacitor EC10, the other end of the capacitor C40 and the other end of the capacitor C42 are all connected with GND; the other end of the resistor R70 is connected with the negative electrode of the diode D2; the positive electrode of the diode D2 is connected with the output end of the power module 600; the No. 5 pin and the No. 24 pin of the digital audio processing chip U13 are both connected with the output end of the switch module 700; the No. 6 pin, the No. 7 pin, the No. 31 pin, the No. 32 pin, the No. 35 pin and the No. 38 pin of the digital audio processing chip U13 are all connected with the output end of the HDMI digital audio signal input unit; the No. 8 pin, the No. 20 pin, the No. 21 pin, the No. 28 pin, the No. 29 pin and the No. 30 pin of the digital audio processing chip U13 are all connected with the output end of the wireless signal input unit; the No. 8 pin, the No. 28 pin, the No. 29 pin and the No. 36 pin of the digital audio processing chip U13 are all connected with the output end of the analog signal input unit; the No. 10 pin of the digital audio processing chip U13 and one end of the ferrite magnet FB9 are both connected with D3V3; the No. 10 pin of the digital audio processing chip U13 is connected with one end of the capacitor C35, one end of the capacitor C36 and one end of the capacitor C43; and the other end of the capacitor C36 is connected with GND; the No. 12 pin of the digital audio processing chip U13 is connected with the other end of the capacitor C35 and the other end of the capacitor C43, and the No. 12 pin of the digital audio processing chip U13 is connected with GND; the No. 11 pin of the digital audio processing chip U13 is connected with the output end of the Bluetooth signal input unit; the No. 13 pin of the digital audio processing chip U13 is connected with the other end of the ferrite magnet FB9, one end of the capacitor C31 and one end of the capacitor C37; and the other end of the capacitor C31, the other end of the capacitor C37 and one end of the capacitor C32 are all connected with GND; the No. 14 pin of the digital audio processing chip U13 is connected with the other end of the capacitor C32; the No. 18 pin and the No. 19 pin of the digital audio processing chip U13 are both connected with the input end of the power amplification module 400; the No. 26 pin and the No. 27 pin of the digital audio processing chip U13 are both connected with the output end of the USB signal input unit; the No. 46 pin and the No. 47 pin of the digital audio processing chip U13 are both connected with the input end of the pre-amplification module 300.

[0138] In the embodiment, the pre-amplification module 300 is as shown in the following figure: Figure 3As shown, it comprises operational amplifier U6-A, operational amplifier U6-B, capacitor C3, resistor R10, resistor R2, resistor R11, capacitor C2, capacitor C1, resistor R3, resistor R1, capacitor C9, resistor R13, capacitor C8, resistor R16, resistor R8, resistor R17, capacitor C5, resistor R9, capacitor C4, resistor R7, capacitor C10, resistor R14, capacitor C94, capacitor C95, capacitor C101 and capacitor C64; one end of the capacitor C3 is connected with pin 46 of the digital audio processing chip U13, the other end of the capacitor C3 is connected with one end of the resistor R10; the other end of the resistor R10 is connected with one end of the resistor R2, one end of the resistor R11 and one end of the capacitor C2; the other end of the resistor R2, one end of the resistor R3 and one end of the capacitor C1 are all connected with pin 2 of the operational amplifier U6-A; the other end of the resistor R3, the other end of the capacitor C1 and one end of the resistor R1 are all connected with pin 1 of the operational amplifier U6-A; one end of the capacitor C8 is connected with pin 47 of the digital audio processing chip U13, the other end of the capacitor C8 is connected with one end of the resistor R16; the other end of the resistor R16 is connected with one end of the resistor R8, one end of the resistor R17 and one end of the capacitor C5; the other end of the resistor R8, one end of the resistor R9 and one end of the capacitor C4 are all connected with pin 6 of the operational amplifier U6-B; the other end of the resistor R9, the other end of the capacitor C4 and one end of the resistor R7 are all connected with pin 7 of the operational amplifier U6-B; the other end of the resistor R1, one end of the capacitor C9, one end of the resistor R13, the other end of the resistor R7, one end of the capacitor C10 and one end of the resistor R14 are all connected with the input end of the power amplification module 400; pin 4 and pin 8 of the operational amplifier U6-A, pin 4 and pin 8 of the operational amplifier U6-A, one end of the capacitor C94, one end of the capacitor C95, one end of the capacitor C101, one end of the capacitor C64 are all connected with the output end of the front-stage power supply module 500; the other end of the resistor R11, the other end of the capacitor C2, pin 3 of the operational amplifier U6-A, the other end of the capacitor C9, the other end of the resistor R13, the other end of the capacitor C10, the other end of the resistor R14, the other end of the resistor R17, the other end of the capacitor C5, pin 5 of the operational amplifier U6-A, the other end of the capacitor C94, the other end of the capacitor C95, the other end of the capacitor C101, the other end of the capacitor C64 are all grounded.

[0139] In the embodiment, the power amplification module 400 is as shown in the following figure: Figure 4The shown, including audio amplifier IC104, resistance R15, triode Q2, resistance R20, resistance R172, capacitor C59, capacitor C108, resistance R170, capacitor C179, inductance L5, capacitor C97, capacitor C196, resistance R197, capacitor C199, capacitor C178, inductance L1, capacitor C102, capacitor C103, resistance R29, capacitor C107, capacitor C177, inductance L6, capacitor C58, capacitor C195, resistance R25, capacitor C106, capacitor C176, inductance L3, capacitor C104, capacitor C105, resistance R196 and capacitor C198; the audio amplifier IC104 is TPA3116D; one end of the resistance R15 is connected with the 18th pin of the digital audio processing chip U13; the base of the triode Q2 is connected with the other end of the resistance R15, the emitter of the triode Q2 is grounded, and the collector of the triode Q2 is connected with one end of the resistance R20; the other end of the resistance R20 is connected with one end of the resistance R172, the 2nd pin of the audio amplifier IC104 and the 3rd pin of the audio amplifier IC104; the other end of the resistance R72 is connected with 24V+; one end of the capacitor C59 is connected with the other end of the resistance R1, one end of the capacitor C9 and one end of the resistance R13, and the other end of the capacitor C59 is connected with the 4th pin of the audio amplifier IC104; one end of the capacitor C108 is connected with the other end of the resistance R7, one end of the capacitor C10 and one end of the resistance R14, and the other end of the capacitor C108 is connected with the 10th pin of the audio amplifier IC104; one end of the resistance R170 is connected with the 19th pin of the digital audio processing chip U13, and the other end of the resistance R170 is connected with the 12th pin of the audio amplifier IC104; one end of the capacitor C176 is connected with the 20th pin of the audio amplifier IC104, and the other end of the capacitor C176 is connected with the 21st pin of the audio amplifier IC104 and one end of the inductance L3; the other end of the inductance L3 is connected with one end of the capacitor C104, one end of the capacitor C105 and one end of the resistance R196, and the other end of the inductance L3 is used for being connected with an audio driving unit; the other end of the resistance R196 is connected with one end of the capacitor C198; one end of the capacitor C177 is connected with the 24th pin of the audio amplifier IC104, and the other end of the capacitor C177 is connected with the 23rd pin of the audio amplifier IC104 and one end of the inductance L6; the other end of the inductance L6 is connected with one end of the capacitor C58, one end of the capacitor C195 and one end of the resistance R25, and the other end of the inductance L6 is used for being connected with the audio driving unit; the other end of the resistance R25 is connected with one end of the capacitor C106;One end of the capacitor C178 is connected with the pin 26 of the audio amplifier IC 104, the other end of the capacitor C178 is connected with the pin 27 of the audio amplifier IC 104 and one end of the inductor L1; the other end of the inductor L1 is connected with one end of the capacitor C102, one end of the capacitor C103 and one end of the resistor R29, and the other end of the inductor L1 is used for connecting with an audio driving unit; the other end of the resistor R29 is connected with one end of the capacitor C107; one end of the capacitor C179 is connected with the pin 30 of the audio amplifier IC 104, the other end of the capacitor C179 is connected with the pin 29 of the audio amplifier IC 104 and one end of the inductor L5; the other end of the inductor L5 is connected with one end of the capacitor C97, one end of the capacitor C196 and one end of the resistor R197, and the other end of the inductor L5 is used for connecting with an audio driving unit; the other end of the resistor R197 is connected with one end of the capacitor C199; the other end of the capacitor C104, the other end of the capacitor C105, the other end of the capacitor C58, the other end of the capacitor C195, the other end of the capacitor C102, the other end of the capacitor C103, the other end of the capacitor C97, the other end of the capacitor C196, the other end of the capacitor C198, the other end of the capacitor C106, the other end of the capacitor C107 and the other end of the capacitor C199 are grounded.

[0140] In the embodiment, the front-stage power supply module 500 is as shown in Figure 7As shown, it comprises voltage stabilizing chip U302, resistance R305, electrolytic capacitor C308, capacitor C307, resistance R307, resistance R308, inductor L302, diode D305, electrolytic capacitor C310, diode D302, electrolytic capacitor C311, capacitor C312, diode D303, diode D304, capacitor C313, electrolytic capacitor C314, capacitor C315, resistance R309 and resistance R306; the voltage stabilizing chip U302 is XL6007; one end of the resistance R305 is connected with the output end of the power module 600; the No. 2 pin of the voltage stabilizing chip U302 is connected with the other end of the resistance R305, the positive pole of the electrolytic capacitor C308, one end of the capacitor C307 and one end of the inductor L302; the other end of the inductor L302 is connected with the No. 5 pin of the voltage stabilizing chip U302, the No. 6 pin of the voltage stabilizing chip U302, the positive pole of the electrolytic capacitor C310 and the negative pole of the diode D302; the No. 3 pin of the voltage stabilizing chip U302 is connected with one end of the resistance R307 and one end of the resistance R308; the negative pole of the electrolytic capacitor C308, the other end of the capacitor C307, the other end of the resistance R307 and the positive pole of the diode D305 are grounded; the other end of the resistance R308 is connected with the positive pole of the diode D302, the positive pole of the electrolytic capacitor C311, one end of the capacitor C312 and the positive pole of the diode D303; the negative pole of the electrolytic capacitor C310 and the negative pole of the diode D305 are connected with the positive pole of the diode D304; the negative pole of the diode D304 is connected with the positive pole of the electrolytic capacitor C314, one end of the capacitor C315 and one end of the resistance R305, and the negative pole of the diode D304 is also connected with the No. 4 pin of the operational amplifier U6-A, the No. 4 pin of the operational amplifier U6-A, one end of the capacitor C94 and one end of the capacitor C101; the negative pole of the electrolytic capacitor C314, the other end of the capacitor C314, the negative pole of the electrolytic capacitor C311, the other end of the capacitor C31, one end of the capacitor C313 and one end of the resistance R309 are grounded; the negative pole of the diode D303 is connected with the other end of the capacitor C313, the other end of the resistance R309 and the other end of the resistance R306, and the negative pole of the diode D303 is also connected with the No. 8 pin of the operational amplifier U6-A, the No. 8 pin of the operational amplifier U6-A, one end of the capacitor C95 and one end of the capacitor C64.

[0141] In the embodiment, the power module 600 is as shown in the following figure: Figure 6As shown, it includes diode D15, resistor R51, resistor R50, triode Q1, MOS Q3, resistor R48, resistor R49, Schottky diode Q12, capacitor C124, capacitor C125, resistor R57, electrolytic capacitor EC4, capacitor C123, common mode inductor L7, power supply chip U5, capacitor C112, capacitor C73, electrolytic capacitor EC7, inductor L2, capacitor C116, capacitor C118, electrolytic capacitor EC9, capacitor C117, resistor R135, resistor R134, resistor R138, resistor R137, resistor R136 and capacitor C120; the positive of diode D15 is used for POWER; the negative of diode is connected with one end of resistor R51; one end of resistor R50 is used for AC, the other end of resistor R50 and the other end of resistor R51 are both connected with the base of triode Q1; the base of triode Q1 is used for RESET; the emitter of triode Q1 is connected with GND; the collector of triode Q1 is connected with one end of resistor R49 and one positive of Schottky diode Q12; the other positive of Schottky diode Q12 is connected with one end of capacitor C124, and the other positive of Schottky diode Q12 is connected with the input end of switch module 700; the other end of capacitor C124 is connected with GND; the negative of Schottky diode Q12 is connected with the input end of switch module 700; the other end of resistor R49 is connected with one end of resistor R48 and the gate of MOS Q3; the other end of resistor R48 and the source of MOS Q3 are both used for power supply battery; the drain of MOS Q3 is connected with one end of resistor R53, the positive of electrolytic capacitor EC4, one end of capacitor C123, 1 pin of common mode inductor L7, and is used for VB; the other end of resistor R53, one end of capacitor C125 and one end of resistor R57 are all used for BAT_DET; the other end of capacitor C125, the other end of resistor R57, the negative of electrolytic capacitor EC4, the other end of capacitor C123, 2 pin of common mode inductor L7 are all connected with GND; 3 pin of common mode inductor L7 is connected with ground; 4 pin of common mode inductor L7 is connected with the positive of electrolytic capacitor EC9, one end of capacitor C117, 2 pin of power supply chip U5 and 3 pin of power supply chip U5; 1 pin of power supply chip U5 is connected with one end of capacitor C118, one end of inductor L2 and one end of capacitor C116; the other end of capacitor C118 is connected with the negative of electrolytic capacitor EC9, capacitor C117, the negative of electrolytic capacitor EC7, one end of resistor R135, 9 pin of power supply chip U5, one end of resistor R137, one end of resistor R136, one end of capacitor C120, one end of capacitor C73 and one end of capacitor C112, which are all connected with GND.The other end of the inductor L2 is connected with the positive pole of the electrolytic capacitor EC7, the other end of the capacitor C73, one end of the resistor R134, the other end of the capacitor C112, the positive pole of the diode D2, one end of the resistor R305, the input end of the HDMI digital audio signal input unit, the input end of the analog signal input unit, the input end of the wireless signal input unit, and the input end of the USB signal input unit; the other end of the capacitor C116 is connected with the 8th pin of the power supply chip U5; the other end of the resistor R135 is connected with the 4th pin of the power supply chip U5; the other end of the resistor R134 is connected with one end of the resistor R138; the other end of the resistor R138 and the other end of the resistor R137 are connected with the 5th pin of the power supply chip U5; the other end of the resistor R136 is connected with the 6th pin of the power supply chip U5; and the other end of the capacitor C120 is connected with the 7th pin of the power supply chip U5.

[0142] In the embodiment, the switch module 700 is as shown in Figure 5As shown, including resistance R56, capacitor C159, resistance R36, resistance R37, key switch S6, resistance R38, key switch S6, resistance R39, key switch S13, resistance R40, key switch S11, resistance R55, key switch S10, resistance R153, key switch S4, volume adjustment knob BM4, resistance R150, resistance R151, resistance R149, resistance R152, capacitor C148 and capacitor C155; one end of the resistance R56 is used to connect D3V3, the other end of the resistance R56 is connected with the 5th pin of the digital audio processing chip U13, one end of the capacitor C159, one end of the resistance R36, one end of the resistance R37, one end of the resistance R38, one end of the resistance R39, one end of the resistance R40, one end of the resistance R55, one end of the resistance R153; one end of the resistance R36 is connected with the other positive electrode of the Schottky diode Q12; the other end of the resistance R37 is connected with one end of the key switch S6; the other end of the resistance R38 is connected with one end of the key switch S5; the other end of the resistance R39 is connected with one end of the key switch S13; the other end of the resistance R40 is connected with one end of the key switch S11; the other end of the resistance R55 is connected with one end of the key switch S10; the other end of the resistance R153 is connected with one end of the key switch S4; the other end of the capacitor C159, the other end of the key switch S6, the other end of the key switch S5, the other end of the key switch S13, the other end of the key switch S11, the other end of the key switch S10, the other end of the key switch S4 are all connected with GND; the 5th pin of the volume adjustment knob BM4 is connected with the negative electrode of the Schottky diode Q12; the 4th pin of the volume adjustment knob BM4, the 2nd pin of the volume adjustment knob BM4, one end of the capacitor C148, one end of the capacitor C155 are all connected with GND; the other end of the capacitor C148 is connected with one end of the resistance R151; the other end of the capacitor C155 is connected with one end of the resistance R152; the 1st pin of the volume adjustment knob BM4 is connected with the other end of the resistance R151 and one end of the resistance R150; the 3rd pin of the volume adjustment knob BM4 is connected with the other end of the resistance R152 and one end of the resistance R149; the other end of the resistance R120 and the other end of the resistance R149 are all connected with D3V3.

[0143] The working principle of the sound system in this embodiment is as follows:

[0144] When the HDMI digital audio signal is accessed, the HDMI digital audio signal is accessed through the No. 14 pin of the HDMI seat J7 to the No. 35 pin of the digital audio processing chip U13. After the digital audio processing chip U13 processes the accessed HDMI digital audio signal, the No. 46 pin and the No. 47 pin of the digital audio processing chip U13 output the analog signal. The analog signal is amplified by the operational amplifier U6-A and the operational amplifier U6-B in the pre-stage amplification module 300, then is power-amplified by the audio amplifier IC104 in the power amplification module 400, and is output to the audio driving unit after power amplification.

[0145] When the analog signal is accessed, the analog signal enters the operational amplifier U3-A and the operational amplifier U3-B through the interface JK4 for pre-stage amplification, and then is converted into a digital signal by the analog-digital conversion chip U8. The model of the analog-digital conversion chip U8 is ADC0832. The digital signal is transmitted to the digital audio processing chip U13 through the I2S signal. After the digital audio processing chip U13 processes the accessed digital signal, the No. 46 pin and the No. 47 pin of the digital audio processing chip U13 output the analog signal. The analog signal is amplified by the operational amplifier U6-A and the operational amplifier U6-B in the pre-stage amplification module 300, then is power-amplified by the audio amplifier IC104 in the power amplification module 400, and is output to the audio driving unit after power amplification.

[0146] When the Bluetooth signal is accessed, the Bluetooth signal is accessed through the antenna J1 to the No. 11 pin of the digital audio processing chip U13. After the digital audio processing chip U13 processes the accessed Bluetooth signal, the No. 46 pin and the No. 47 pin of the digital audio processing chip U13 output the analog signal. The analog signal is amplified by the operational amplifier U6-A and the operational amplifier U6-B in the pre-stage amplification module 300, then is power-amplified by the audio amplifier IC104 in the power amplification module 400, and is output to the audio driving unit after power amplification.

[0147] When the wireless signal is accessed, the wireless signal is received through the antenna J2 and is transmitted to the audio decoding chip U1. The audio decoding chip U1 is BP1532B, and the ESDD28 is PT2C031 UUER-M. The audio decoding chip U1 decodes the wireless signal into a digital signal. The digital signal is transmitted to the digital audio processing chip U13 through the I2S signal. After the digital audio processing chip U13 processes the accessed digital signal, the No. 46 pin and the No. 47 pin of the digital audio processing chip U13 output the analog signal. The analog signal is amplified by the operational amplifier U6-A and the operational amplifier U6-B in the pre-stage amplification module 300, then is power-amplified by the audio amplifier IC104 in the power amplification module 400, and is output to the audio driving unit after power amplification.

[0148] The signal input module 100 further comprises an OTG input unit as shown in Figure 14 The 2nd pin of the OTG input unit is connected with the 18th pin of the audio decoding chip U1 in the wireless signal input unit, and the 3rd pin of the OTG input unit is connected with the 19th pin of the audio decoding chip U1 in the wireless signal input unit, so that the user can connect the OTG input unit with the mobile phone by using the TYPE-C line, thereby achieving the purpose of using the mobile phone live broadcast software.

[0149] The audio driving unit, as shown in Figure 13 The audio driving unit, as shown in

[0150] The digital audio processing chip U13 automatically adjusts the audio parameters according to different use scenarios (such as home theater mode, game mode, KTV mode and live broadcast listening mode, etc.), so as to provide better sound effect.

[0151] The signal input module 100 comprises an HDMI digital audio signal input unit as shown in Figure 9 An analog signal input unit as shown in Figure 12 A Bluetooth signal input unit as shown in Figure 8 A wireless signal input unit as shown in Figure 11 A USB signal input unit as shown in Figure 10 An OTG input unit as shown in Figure 14 The signal input module 100 comprises an HDMI digital audio signal input unit as shown in

[0152] The volume and sound effect can be adjusted by the switch module 700, so as to achieve the purpose of adjusting the sound performance of the sound according to the personal preference and actual demand of the user.

[0153] Although the present application has been described herein with reference to the various illustrative embodiments thereof, it should be understood that various other modifications and implementations can be devised by those skilled in the art, which will fall within the principles of the present application. More specifically, many variations and modifications of the subject combination layout, as well as the components and / or layouts thereof, can be made within the scope and spirit of the present application disclosure, drawings and claims. In addition to variations and modifications of the components and / or layouts, other uses will be apparent to those skilled in the art.

Claims

1. An audio system, characterized by The application relates to an audio system, which comprises the following parts: a signal input module (100), the input end of which is used for accessing signals; a main control module (200), the input end of which is connected with the output end of the signal input module (100); a pre-stage amplification module (300), the input end of which is connected with the output end of the main control module (200); a power amplification module (400), the input end of which is connected with the output end of the main control module (200) and the output end of the pre-stage amplification module (300), and the output end of which is used for being connected with an audio driving unit; a pre-stage power supply module (500), the output end of which is connected with the input end of the signal input module (100) and the input end of the pre-stage amplification module (300); a power module (600), the input end of which is used for accessing a power supply battery, and the output end of which is connected with the input end of the pre-stage power supply module (500), the input end of the main control module (200) and the input end of the signal input module (100); a switch module (700), which is connected with the main control module (200) and the input end of which is connected with the output end of the power module (600).

2. The audio system according to claim 1, wherein: the signal input module (100) comprises an HDMI digital audio signal input unit, an analog signal input unit, a Bluetooth signal input unit, a wireless signal input unit and a USB signal input unit; the output end of the HDMI digital audio signal input unit, the output end of the analog signal input unit, the output end of the Bluetooth signal input unit, the output end of the wireless signal input unit and the output end of the USB signal input unit are connected with the input end of the main control module (200); wherein the input end of the HDMI digital audio signal input unit is used for accessing an HDMI digital audio signal; the input end of the analog signal input unit is used for accessing an analog signal; the input end of the Bluetooth signal input unit is used for accessing a Bluetooth signal; the input end of the wireless signal input unit is used for accessing a wireless signal; and the input end of the USB signal input unit is used for accessing a USB signal.

3. The audio system according to claim 2, wherein: the main control module (200) comprises a digital audio processing chip U13, a diode D2, a resistor R70, an electrolytic capacitor EC10, a capacitor C31, a capacitor C32, a capacitor C35, a capacitor C36, a capacitor C37, a capacitor C40, a capacitor C42, a capacitor C43 and a ferrite magnet FB9; the digital audio processing chip U13 is BP1048B1. The No.2 pin of the digital audio processing chip U13 is connected with one end of the resistor R70, the positive pole of the electrolytic capacitor EC10, one end of the capacitor C40 and one end of the capacitor C42; the negative pole of the electrolytic capacitor EC10, the other end of the capacitor C40 and the other end of the capacitor C42 are all connected with GND; the other end of the resistor R70 is connected with the negative pole of the diode D2; the positive pole of the diode D2 is connected with the output end of the power module (600); The No.5 pin and the No.24 pin of the digital audio processing chip U13 are both connected with the output end of the switch module (700); The No.6 pin, the No.7 pin, the No.31 pin, the No.32 pin, the No.35 pin and the No.38 pin of the digital audio processing chip U13 are all connected with the output end of the HDMI digital audio signal input unit; The No.8 pin, the No.20 pin, the No.21 pin, the No.28 pin, the No.29 pin and the No.30 pin of the digital audio processing chip U13 are all connected with the output end of the wireless signal input unit; The No.8 pin, the No.28 pin, the No.29 pin and the No.36 pin of the digital audio processing chip U13 are all connected with the output end of the analog signal input unit; The No.10 pin of the digital audio processing chip U13 and one end of the ferrite magnet FB9 are both connected with D3V3; The No.10 pin of the digital audio processing chip U13 is connected with one end of the capacitor C35, one end of the capacitor C36 and one end of the capacitor C43; and the other end of the capacitor C36 is connected with GND; The No.12 pin of the digital audio processing chip U13 is connected with the other end of the capacitor C35 and the other end of the capacitor C43; and the No.12 pin of the digital audio processing chip U13 is connected with GND; The No.11 pin of the digital audio processing chip U13 is connected with the output end of the Bluetooth signal input unit; The No.13 pin of the digital audio processing chip U13 is connected with the other end of the ferrite magnet FB9, one end of the capacitor C31 and one end of the capacitor C37; and the other end of the capacitor C31, the other end of the capacitor C37 and one end of the capacitor C32 are all connected with GND; The No.14 pin of the digital audio processing chip U13 is connected with the other end of the capacitor C32; The No.18 pin and the No.19 pin of the digital audio processing chip U13 are both connected with the input end of the power amplification module (400); The No.26 pin and the No.27 pin of the digital audio processing chip U13 are both connected with the output end of the USB signal input unit; The No.46 pin and the No.47 pin of the digital audio processing chip U13 are both connected with the input end of the pre-stage amplification module (300).

4. The sound system according to claim 3, characterized in that: The pre-stage amplification module (300) comprises an operational amplifier U6-A, an operational amplifier U6-B, a capacitor C3, a resistor R10, a resistor R2, a resistor R11, a capacitor C2, a capacitor C1, a resistor R3, a resistor R1, a capacitor C9, a resistor R13, a capacitor C8, a resistor R16, a resistor R8, a resistor R17, a capacitor C5, a resistor R9, a capacitor C4, a resistor R7, a capacitor C10, a resistor R14, a capacitor C94, a capacitor C95, a capacitor C101 and a capacitor C64; One end of the capacitor C3 is connected to the pin 46 of the digital audio processing chip U13, and the other end of the capacitor C3 is connected to one end of the resistor R10; The other end of the resistor R10 is connected to one end of the resistor R2, one end of the resistor R11 and one end of the capacitor C2; The other end of the resistor R2, one end of the resistor R3 and one end of the capacitor C1 are all connected to the pin 2 of the operational amplifier U6-A; The other end of the resistor R3, the other end of the capacitor C1 and one end of the resistor R1 are all connected to the pin 1 of the operational amplifier U6-A; One end of the capacitor C8 is connected to the pin 47 of the digital audio processing chip U13, and the other end of the capacitor C8 is connected to one end of the resistor R16; The other end of the resistor R16 is connected to one end of the resistor R8, one end of the resistor R17 and one end of the capacitor C5; The other end of the resistor R8, one end of the resistor R9 and one end of the capacitor C4 are all connected to the pin 6 of the operational amplifier U6-B; The other end of the resistor R9, the other end of the capacitor C4 and one end of the resistor R7 are all connected to the pin 7 of the operational amplifier U6-B; The other end of the resistor R1, one end of the capacitor C9, one end of the resistor R13, the other end of the resistor R7, one end of the capacitor C10 and one end of the resistor R14 are all connected to the input end of the power amplification module (400); The pin 4 and the pin 8 of the operational amplifier U6-A, the pin 4 and the pin 8 of the operational amplifier U6-A, one end of the capacitor C94, one end of the capacitor C95, one end of the capacitor C101, one end of the capacitor C64 are all connected to the output end of the pre-stage power supply module (500); The other end of the resistor R11, the other end of the capacitor C2, the pin 3 of the operational amplifier U6-A, the other end of the capacitor C9, the other end of the resistor R13, the other end of the capacitor C10, the other end of the resistor R14, the other end of the resistor R17, the other end of the capacitor C5, the pin 5 of the operational amplifier U6-A, the other end of the capacitor C94, the other end of the capacitor C95, the other end of the capacitor C101 and the other end of the capacitor C64 are all grounded.

5. The sound system of claim 4, wherein: The power amplification module (400) comprises an audio amplifier IC 104, a resistor R15, a triode Q2, a resistor R20, a resistor R172, a capacitor C59, a capacitor C108, a resistor R170, a capacitor C179, an inductor L5, a capacitor C97, a capacitor C196, a resistor R197, a capacitor C199, a capacitor C178, an inductor L1, a capacitor C102, a capacitor C103, a resistor R29, a capacitor C107, a capacitor C177, an inductor L6, a capacitor C58, a capacitor C195, a resistor R25, a capacitor C106, a capacitor C176, an inductor L3, a capacitor C104, a capacitor C105, a resistor R196 and a capacitor C198; The audio amplifier IC 104 is TPA3116D; One end of the resistor R15 is connected with a No. 18 pin of a digital audio processing chip U13; The base of the triode Q2 is connected with the other end of the resistor R15, the emitter of the triode Q2 is grounded, and the collector of the triode Q2 is connected with one end of the resistor R20; The other end of the resistor R20 is connected with one end of the resistor R172, a No. 2 pin of the audio amplifier IC 104 and a No. 3 pin of the audio amplifier IC 104; The other end of the resistor R72 is connected with 24V+; One end of the capacitor C59 is connected with the other end of the resistor R1, one end of the capacitor C9 and one end of the resistor R13, and the other end of the capacitor C59 is connected with a No. 4 pin of the audio amplifier IC 104; One end of the capacitor C108 is connected with the other end of the resistor R7, one end of the capacitor C10 and one end of the resistor R14, and the other end of the capacitor C108 is connected with a No. 10 pin of the audio amplifier IC 104; One end of the resistor R170 is connected with a No. 19 pin of the digital audio processing chip U13, and the other end of the resistor R170 is connected with a No. 12 pin of the audio amplifier IC 104; One end of the capacitor C176 is connected with a No. 20 pin of the audio amplifier IC 104, and the other end of the capacitor C176 is connected with a No. 21 pin of the audio amplifier IC 104 and one end of the inductor L3; The other end of the inductor L3 is connected with one end of the capacitor C104, one end of the capacitor C105 and one end of the resistor R196, and the other end of the inductor L3 is used for being connected with an audio driving unit; The other end of the resistor R196 is connected with one end of the capacitor C198; One end of the capacitor C177 is connected with a No. 24 pin of the audio amplifier IC 104, and the other end of the capacitor C177 is connected with a No. 23 pin of the audio amplifier IC 104 and one end of the inductor L6; The other end of the inductor L6 is connected with one end of the capacitor C58, one end of the capacitor C195 and one end of the resistor R25, and the other end of the inductor L6 is used for being connected with the audio driving unit; The other end of the resistor R25 is connected with one end of the capacitor C106. One end of the capacitor C178 is connected with the pin 26 of the audio amplifier IC 104, and the other end of the capacitor C178 is connected with the pin 27 of the audio amplifier IC 104 and one end of the inductor L1; The other end of the inductor L1 is connected with one end of the capacitor C102, one end of the capacitor C103 and one end of the resistor R29, and the other end of the inductor L1 is used for connecting with the audio driving unit; The other end of the resistor R29 is connected with one end of the capacitor C107; One end of the capacitor C179 is connected with the pin 30 of the audio amplifier IC 104, and the other end of the capacitor C179 is connected with the pin 29 of the audio amplifier IC 104 and one end of the inductor L5; The other end of the inductor L5 is connected with one end of the capacitor C97, one end of the capacitor C196 and one end of the resistor R197, and the other end of the inductor L5 is used for connecting with the audio driving unit; The other end of the resistor R197 is connected with one end of the capacitor C199; The other end of the capacitor C104, the other end of the capacitor C105, the other end of the capacitor C58, the other end of the capacitor C195, the other end of the capacitor C102, the other end of the capacitor C103, the other end of the capacitor C97, the other end of the capacitor C196, the other end of the capacitor C198, the other end of the capacitor C106, the other end of the capacitor C107 and the other end of the capacitor C199 are grounded.

6. The sound system of claim 5, wherein: The front-stage power supply module (500) comprises a voltage stabilizing chip U302, a resistor R305, an electrolytic capacitor C308, a capacitor C307, a resistor R307, a resistor R308, an inductor L302, a diode D305, an electrolytic capacitor C310, a diode D302, an electrolytic capacitor C311, a capacitor C312, a diode D303, a diode D304, a capacitor C313, an electrolytic capacitor C314, a capacitor C315, a resistor R309 and a resistor R306; The voltage stabilizing chip U302 is XL6007; One end of the resistor R305 is connected with the output end of the power supply module (600); The pin 2 of the voltage stabilizing chip U302 is connected with the other end of the resistor R305, the positive electrode of the electrolytic capacitor C308, one end of the capacitor C307 and one end of the inductor L302; The other end of the inductor L302 is connected with the pin 5 of the voltage stabilizing chip U302, the pin 6 of the voltage stabilizing chip U302, the positive electrode of the electrolytic capacitor C310 and the negative electrode of the diode D302; The pin 3 of the voltage stabilizing chip U302 is connected with one end of the resistor R307 and one end of the resistor R308; The negative electrode of the electrolytic capacitor C308, the other end of the capacitor C307, the other end of the resistor R307 and the positive electrode of the diode D305 are grounded; The other end of the resistor R308 is connected with the positive electrode of the diode D302, the positive electrode of the electrolytic capacitor C311, one end of the capacitor C312 and the positive electrode of the diode D303; The negative electrode of the electrolytic capacitor C310 and the negative electrode of the diode D305 are connected with the positive electrode of the diode D304; The negative electrode of the diode D304 is connected with the positive electrode of the electrolytic capacitor C314, one end of the capacitor C315 and one end of the resistor R305, and is also connected with the No. 4 pin of the operational amplifier U6-A, the No. 4 pin of the operational amplifier U6-A, one end of the capacitor C94 and one end of the capacitor C101; The negative electrode of the electrolytic capacitor C314, the other end of the capacitor C314, the negative electrode of the electrolytic capacitor C311, the other end of the capacitor C31, one end of the capacitor C313 and one end of the resistor R309 are connected with GND; The negative electrode of the diode D303 is connected with the other end of the capacitor C313, the other end of the resistor R309 and the other end of the resistor R306, and is also connected with the No. 8 pin of the operational amplifier U6-A, the No. 8 pin of the operational amplifier U6-A, one end of the capacitor C95 and one end of the capacitor C64.

7. The sound system of claim 6, wherein: The power module (600) comprises a diode D15, a resistor R51, a resistor R50, a triode Q1, a MOS tube Q3, a resistor R48, a resistor R49, a Schottky diode Q12, a capacitor C124, a resistor R53, a capacitor C125, a resistor R57, an electrolytic capacitor EC4, a capacitor C123, a common mode inductor L7, a power supply chip U5, a capacitor C112, a capacitor C73, an electrolytic capacitor EC7, an inductor L2, a capacitor C116, a capacitor C118, an electrolytic capacitor EC9, a capacitor C117, a resistor R135, a resistor R134, a resistor R138, a resistor R137, a resistor R136 and a capacitor C120; The positive electrode of the diode D15 is used for connecting with POWER; The negative electrode of the diode is connected with one end of the resistor R51; One end of the resistor R50 is used for connecting with AC, and the other end of the resistor R50 and the other end of the resistor R51 are connected with the base of the triode Q1; The base of the triode Q1 is used for connecting with RESET; The emitter of the triode Q1 is connected with GND; The collector of the triode Q1 is connected with one end of the resistor R49 and one positive electrode of the Schottky diode Q12; The other positive electrode of the Schottky diode Q12 is connected with one end of the capacitor C124, and is also connected with the input end of the switch module (700); The other end of the capacitor C124 is connected with GND; The negative electrode of the Schottky diode Q12 is connected with the input end of the switch module (700); The other end of the resistor R49 is connected with one end of the resistor R48 and the gate of the MOS tube Q3; The other end of the resistor R48 and the source of the MOS tube Q3 are used for connecting with the power supply battery; The drain of the MOS tube Q3 is connected with one end of the resistor R53, the positive electrode of the electrolytic capacitor EC4, one end of the capacitor C123 and the No. 1 pin of the common mode inductor L7, and is used for connecting with VB; The other end of the resistor R53, one end of the capacitor C125, and one end of the resistor R57 are connected to BAT_DET; The other end of the capacitor C125, the other end of the resistor R57, the negative electrode of the electrolytic capacitor EC4, the other end of the capacitor C123, and the No. 2 pin of the common mode inductor L7 are connected to GND; The No. 3 pin of the common mode inductor L7 is connected to ground; The No. 4 pin of the common mode inductor L7 is connected to the positive electrode of the electrolytic capacitor EC9, one end of the capacitor C117, the No. 2 pin of the power supply chip U5, and the No. 3 pin of the power supply chip U5; The No. 1 pin of the power supply chip U5 is connected to one end of the capacitor C118, one end of the inductor L2, and one end of the capacitor C116; The other end of the capacitor C118 is connected to the negative electrode of the electrolytic capacitor EC9, the capacitor C117, the negative electrode of the electrolytic capacitor EC7, one end of the resistor R135, the No. 9 pin of the power supply chip U5, one end of the resistor R137, one end of the resistor R136, one end of the capacitor C120, one end of the capacitor C73, and one end of the capacitor C112; The other end of the inductor L2 is connected to the positive electrode of the electrolytic capacitor EC7, the other end of the capacitor C73, one end of the resistor R134, the other end of the capacitor C112, the positive electrode of the diode D2, one end of the resistor R305, the input end of the HDMI digital audio signal input unit, the input end of the analog signal input unit, the input end of the wireless signal input unit, and the input end of the USB signal input unit; The other end of the capacitor C116 is connected to the No. 8 pin of the power supply chip U5; The other end of the resistor R135 is connected to the No. 4 pin of the power supply chip U5; The other end of the resistor R134 is connected to one end of the resistor R138; The other end of the resistor R138 and the other end of the resistor R137 are connected to the No. 5 pin of the power supply chip U5; The other end of the resistor R136 is connected to the No. 6 pin of the power supply chip U5; The other end of the capacitor C120 is connected to the No. 7 pin of the power supply chip U5.

8. The sound system of claim 7, wherein: The switch module (700) comprises a resistor R56, a capacitor C159, a resistor R36, a resistor R37, a key switch S6, a resistor R38, a key switch S6, a resistor R39, a key switch S13, a resistor R40, a key switch S11, a resistor R55, a key switch S10, a resistor R153, a key switch S4, a volume adjustment knob BM4, a resistor R150, a resistor R151, a resistor R149, a resistor R152, a capacitor C148, and a capacitor C155; One end of the resistor R56 is connected to D3V3, and the other end of the resistor R56 is connected to the No. 5 pin of the digital audio processing chip U13, one end of the capacitor C159, one end of the resistor R36, one end of the resistor R37, one end of the resistor R38, one end of the resistor R39, one end of the resistor R40, one end of the resistor R55, and one end of the resistor R153; One end of the resistor R36 is connected to the other positive electrode of the Schottky diode Q12; The other end of the resistor R37 is connected with one end of the key switch S6; The other end of the resistor R38 is connected with one end of the key switch S5; The other end of the resistor R39 is connected with one end of the key switch S13; The other end of the resistor R40 is connected with one end of the key switch S11; The other end of the resistor R55 is connected with one end of the key switch S10; The other end of the resistor R153 is connected with one end of the key switch S4; The other end of the capacitor C159, the other end of the key switch S6, the other end of the key switch S5, the other end of the key switch S13, the other end of the key switch S11, the other end of the key switch S10, the other end of the key switch S4 are all connected with GND; The 5th pin of the volume adjusting knob BM4 is connected with the negative electrode of the Schottky diode Q12; The 4th pin of the volume adjusting knob BM4, the 2nd pin of the volume adjusting knob BM4, one end of the capacitor C148, one end of the capacitor C155 are all connected with GND; The other end of the capacitor C148 is connected with one end of the resistor R151; The other end of the capacitor C155 is connected with one end of the resistor R152; The 1st pin of the volume adjusting knob BM4 is connected with the other end of the resistor R151 and one end of the resistor R150; The 3rd pin of the volume adjusting knob BM4 is connected with the other end of the resistor R152 and one end of the resistor R149; The other end of the resistor R120 and the other end of the resistor R149 are all connected with D3V3.

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