CN210274513U - Multifunctional sound system - Google Patents
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- CN210274513U CN210274513U CN201921627760.XU CN201921627760U CN210274513U CN 210274513 U CN210274513 U CN 210274513U CN 201921627760 U CN201921627760 U CN 201921627760U CN 210274513 U CN210274513 U CN 210274513U
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Abstract
The embodiment of the utility model discloses a multifunctional sound system, which comprises a plurality of input interfaces, a Bluetooth module, a signal processing circuit, a microphone receiving circuit, at least two power amplifying circuits and at least two loudspeaker sets; the plurality of input interfaces comprise an analog audio signal input interface and a digital audio signal input interface, the analog audio signal input interface is electrically connected with the input end of the Bluetooth module, and the digital audio signal input interface is electrically connected with the first input end of the signal processing circuit; the output end of the Bluetooth module is electrically connected with the second input end of the signal processing circuit; the input end of the microphone receiving circuit is used for receiving audio signals, and the output end of the microphone receiving circuit is electrically connected with the third input end of the signal processing circuit; at least two power amplifying circuits are in one-to-one correspondence with the at least two speaker groups. The utility model provides a technical scheme has realized sound system's multi-functionalization to satisfy people to sound equipment's needs and individualized demand.
Description
Technical Field
The utility model relates to an electron stereo set field especially relates to a multi-functional sound system.
Background
With the progress of technology, people have increasingly stringent requirements for the quality of sound systems, and the requirements for sound systems are not limited to sound stages. Because electronic products are continuously updated, sound equipment becomes more and more intelligent, audio electric energy can be converted into corresponding sound energy, the electronic products are greatly convenient to control, and a sound system is not exceptional.
There are also many stereo sets that have multiple functions among the prior art, but the stereo set function singleness among the prior art can not satisfy most users' demand, consequently, how to expand the stereo set function to satisfy people to the needs and the individualized demand of stereo set equipment, be the problem that the industry is held a urgent need to solve.
SUMMERY OF THE UTILITY MODEL
The utility model provides a multifunctional sound system to realize the multi-functionalization of stereo set.
The utility model provides a multi-functional sound system includes: the system comprises a plurality of input interfaces, a Bluetooth module, a signal processing circuit, a microphone receiving circuit, at least two power amplifying circuits and at least two loudspeaker sets;
the plurality of input interfaces comprise an analog audio signal input interface and a digital audio signal input interface, the analog audio signal input interface is electrically connected with the input end of the Bluetooth module, and the digital audio signal input interface is electrically connected with the first input end of the signal processing circuit;
the output end of the Bluetooth module is electrically connected with the second input end of the signal processing circuit;
the input end of the microphone receiving circuit is used for receiving audio signals, and the output end of the microphone receiving circuit is electrically connected with the third input end of the signal processing circuit;
the at least two power amplifying circuits are in one-to-one correspondence with the at least two loudspeaker sets, the input ends of the power amplifying circuits are electrically connected with the output ends of the signal processing circuits, and the output ends of the power amplifying circuits are electrically connected with the corresponding loudspeaker sets.
Optionally, the signal processing circuit includes a main control chip and an analog audio processing circuit;
the first input end of the analog audio processing circuit is electrically connected with the first output end of the main control chip, the input end of the main control chip is electrically connected with the output end of the Bluetooth module, and the analog audio processing circuit is used for converting analog audio signals output by the Bluetooth module into digital audio signals.
Optionally, the signal processing circuit further includes a sound effect processing circuit and a digital audio processing circuit;
the first input end of the sound effect processing circuit is electrically connected with the second output end of the main control chip, the second input end of the sound effect processing circuit is electrically connected with the first output end of the analog audio processing circuit, and the output end of the sound effect processing circuit is electrically connected with the fourth input end of the analog audio processing circuit;
the input end of the digital audio processing circuit is electrically connected with the digital audio signal input interface, and the output end of the digital audio processing circuit is connected with the third input end of the sound effect processing circuit.
Optionally, the microphone receiving circuit includes a wireless microphone receiving circuit and a wired microphone receiving circuit;
the input end of the wireless microphone receiving circuit is in communication connection with a wireless microphone, and the first output end of the wireless microphone receiving circuit is electrically connected with the second input end of the analog audio processing circuit;
the input end of the wired microphone receiving circuit is electrically connected with the wired microphone input interface, and the output end of the wired microphone receiving circuit is electrically connected with the third input end of the analog audio processing circuit.
Optionally, the at least two power amplifying circuits include a first power amplifying circuit and a second power amplifying circuit, and the at least two speaker groups include a first speaker group and a second speaker group;
the input end of the first power amplifying circuit is electrically connected with the second output end of the analog audio processing circuit, and the output end of the first power amplifying circuit is electrically connected with the first loudspeaker set;
the input end of the second power amplifying circuit is electrically connected with the third output end of the analog audio processing circuit, and the output end of the second power amplifying circuit is electrically connected with the second loudspeaker set.
Optionally, the multifunctional sound system further comprises a power amplifier protection circuit;
the power amplifier protection circuit is electrically connected with the at least two power amplifying circuits respectively.
Optionally, the power amplifier protection circuit includes a first voltage regulator tube, a first resistor, a second resistor, a third resistor, a first triode, and a first capacitor;
the negative electrode of the first voltage-regulator tube is electrically connected with a power supply, the positive electrode of the first voltage-regulator tube is electrically connected with the second end of the first triode through the first resistor, the first end of the first triode is electrically connected with the signal output end of the main control chip through the second resistor, and the third end of the first triode is grounded;
and the first end of the third resistor is electrically connected with the first end of the first triode.
Optionally, the power amplifier protection circuit further includes a second triode, a third triode, a second voltage regulator tube, a diode, a fourth resistor, a fifth resistor, a sixth resistor, and a second capacitor;
a first end of the second triode is electrically connected with a power supply sequentially through the fourth resistor and the second voltage regulator tube, a second end of the second triode is electrically connected with the power supply sequentially through the fifth resistor and the diode, and a third end of the second triode is grounded;
the first end of the third triode is electrically connected with the second end of the second triode through the sixth resistor, the second end of the third triode is electrically connected with the first end of the first triode, and the third end of the third triode is grounded;
the first end of the second capacitor is electrically connected with the cathode of the diode, and the second end of the second capacitor is grounded.
Optionally, the analog audio signal input interface includes an AUX input interface, a bluetooth input interface, and a USB input interface;
the AUX input interface is electrically connected with a first end of a seventh resistor through a third capacitor, a second end of the seventh resistor is electrically connected with an inverting input end of a first operational amplifier, a non-inverting input end of the first operational amplifier is electrically connected with a power supply through an eighth resistor, and an output end of the first operational amplifier is electrically connected with an AUX receiving end of the main control chip through a ninth resistor;
the Bluetooth input interface is electrically connected with the input end of the Bluetooth module, and the output end of the Bluetooth module is electrically connected with the Bluetooth receiving end of the main control chip through a fourth capacitor;
the USB input interface is electrically connected with a USB receiving end of the main control chip through a data line.
Optionally, the digital audio signal input interface includes an optical fiber input interface, an HDMI input interface, and a coaxial input interface; the digital audio processing circuit comprises a control chip;
the optical fiber input interface is electrically connected with a first input end of a second operational amplifier, a second input end of the second operational amplifier is grounded, an output end of the second operational amplifier is electrically connected with a tenth resistor, a fifth capacitor and a sixth capacitor at one time, and a second end of the sixth capacitor is electrically connected with an optical fiber signal receiving end of the control chip;
the HDMI input interface is electrically connected with an HDMI signal receiving end of the control chip through a seventh capacitor, a first end of the seventh capacitor is grounded through an eighth capacitor, and a second end of the seventh capacitor is grounded through an eleventh resistor;
the coaxial input interface is sequentially electrically connected with a ninth capacitor and a twelfth resistor, the second end of the twelfth resistor is electrically connected with the input end of a first phase inverter, the output end of the first phase inverter is electrically connected with the input end of a second phase inverter, the output end of the second phase inverter is electrically connected with the first end of a tenth capacitor, the second end of the tenth capacitor is electrically connected with the first end of a thirteenth resistor, the second end of the thirteenth resistor is electrically connected with the coaxial signal receiving end of the control chip, the first end of the ninth capacitor is electrically connected with the first end of an eleventh capacitor, the second end of the eleventh capacitor is grounded, the first end of a fourteenth resistor is electrically connected with the first end of the ninth capacitor, and the second end of the fourteenth resistor is grounded.
The embodiment of the utility model provides a multifunctional sound system sets up a plurality of input interfaces, can receive multiple analog audio signal and digital audio signal, can realize multifunctional sound system and external communication through the bluetooth module. The signal processing circuit carries out audio processing and sound effect processing on received analog audio signals and digital audio signals, converts electric energy into sound energy through the power amplifying circuit and the loudspeaker set and outputs the sound energy, and in addition, the multifunctional sound system can also realize communication with a microphone through the microphone receiving circuit. The embodiment of the utility model provides a technical scheme has realized sound system's multi-functionalization to satisfy people to sound equipment's needs and individualized demand.
Drawings
Fig. 1 is a schematic structural diagram of a multifunctional sound system provided by the present invention;
fig. 2 is a schematic structural diagram of another multifunctional sound system provided by the present invention;
fig. 3 is a schematic structural diagram of another multifunctional sound system provided by the present invention;
fig. 4 is a schematic structural diagram of another multifunctional sound system provided by the present invention;
fig. 5 is a schematic structural diagram of an analog audio signal input interface provided by the present invention;
fig. 6 is a schematic structural diagram of a digital audio signal input interface according to the present invention.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a multifunctional sound system provided by the present invention. Referring to fig. 1, the multifunctional sound system includes a plurality of input interfaces 10, a bluetooth module 20, a signal processing circuit 30, a microphone receiving circuit 40, at least two power amplifying circuits 50, and at least two speaker sets 60;
the plurality of input interfaces 10 comprise an analog audio signal input interface 101 and a digital audio signal input interface 102, the analog audio signal input interface 101 is electrically connected with the input end a1 of the bluetooth module 20, and the digital audio signal input interface 102 is electrically connected with the first input end B1 of the signal processing circuit 30;
the output end A2 of the Bluetooth module 20 is electrically connected with the second input end B2 of the signal processing circuit 30;
an input end C1 of the microphone receiving circuit 40 is used for receiving an audio signal, and an output end C2 of the microphone receiving circuit 40 is electrically connected with a third input end B3 of the signal processing circuit 30;
the at least two power amplification circuits 50 correspond to the at least two speaker groups 60 one to one, an input end of the power amplification circuit 50 is electrically connected to an output end of the signal processing circuit 30, and an output end of the power amplification circuit 50 is electrically connected to the corresponding speaker group 60.
Specifically, the analog audio signal input interface 101 is used for inputting an analog audio signal to the bluetooth module 20, and the digital audio signal input interface 102 is used for inputting a digital audio signal to the signal processing circuit 30. For example, the analog audio signal may be an AUX left and right channel signal or a USB signal, and the AUX left and right channel signal is accessed to the input terminal a1 of the bluetooth module 20 through an AUX left and right channel signal interface, so as to implement access of a left channel or a right channel signal of the sound system. When a user needs to play other audio, the audio playing method can be implemented through the USB signal interface, for example, the audio stored in the USB disk can be played by electrically connecting a storage device such as a USB disk with the USB signal interface. The digital audio signal may be an HDMI signal, a coaxial signal, or a light signal. The input interface 100 may include a plurality of analog audio signal input interfaces 101 and a plurality of digital audio signal input interfaces 102 to realize access of various audio signals to meet different requirements of users. The bluetooth module 20 receives the analog audio signal input by the analog audio signal input interface 101, and outputs the analog audio signal to the signal processing circuit 30 for audio processing, and meanwhile, the bluetooth module 20 can also realize a bluetooth playing function. For example, the bluetooth module 20 may receive a bluetooth signal sent by a terminal device to play audio stored in the terminal device, where the terminal device may be a mobile phone, a tablet computer, or the like.
The microphone receiving circuit 40 is used for receiving an audio signal input by a microphone, and the signal processing circuit 30 performs audio or sound effect processing on the audio signal input by the microphone, and then performs audio playing through the power amplifying circuit 50 and the speaker group 60. The embodiment of the present invention provides a multifunctional sound system, which includes at least two power amplification circuits 50 and at least two speaker groups 60, and for convenience of description, the two power amplification circuits 50 and the two speaker groups 60 are taken as examples and are respectively referred to as a first power amplification circuit 501 and a second power amplification circuit 502, and a first speaker group 601 and a second speaker group 602. The first speaker group 601 is configured to convert an electrical signal output from the first power amplification circuit 501 into an acoustic signal and output the acoustic signal, and the second speaker group 602 is configured to convert an electrical signal output from the second power amplification circuit 502 into an acoustic signal and output the acoustic signal.
The embodiment of the utility model provides a receive the audio signal of microphone input through microphone receiving circuit to convert audio signal into the signal of telecommunication, signal processing circuit converts the received signal of telecommunication, amplifies the signal of telecommunication after will converting by power amplification circuit, and the signal of telecommunication after the speaker group received and amplified, and the signal of telecommunication after will amplifying converts into acoustic signal output, realizes the audio playback function. Through setting up a plurality of input interface, can realize the input of multiple signal, can also realize bluetooth instant music through the bluetooth module in addition. The embodiment of the utility model provides a technical scheme makes the stereo set function obtain expanding, has realized the most genuine multi-functional sound system.
Optionally, fig. 2 is a schematic structural diagram of another multifunctional sound system provided by the present invention. On the basis of the above embodiment, referring to fig. 2, the signal processing circuit 30 includes a main control chip 310 and an analog audio processing circuit 320;
the first input end E1 of the analog audio processing circuit 320 is electrically connected to the first output end of the main control chip 310, the input end of the main control chip 310 is electrically connected to the output end a2 of the bluetooth module 20, and the analog audio processing circuit 320 is configured to convert the analog audio signal output by the bluetooth module 20 into a digital audio signal.
Specifically, the audio signal is a frequency and amplitude variation information carrier with regular sound waves of voice, music and sound effects. The main control chip 310 is configured to convert the bluetooth signal output by the bluetooth module 20 into an electrical signal, where the electrical signal is an analog electrical signal; the analog audio processing circuit 320 receives the analog electrical signal output by the main control chip 310, and converts the analog electrical signal into a digital electrical signal for output. Illustratively, the analog audio processing circuit 320 may include an ADAUA1701 audio processing chip capable of performing processing for balancing, mixing, bass enhancement, multi-band dynamic processing, delay compensation, and stereo image extension of the received analog signal. The analog audio processing circuit 320 receives the analog electrical signal output by the main control chip 310 or directly receives the analog audio signal, and performs sampling, quantization and compression processing on the received analog signal to form a digital audio signal output.
Optionally, with continued reference to fig. 2, the signal processing circuit 30 further includes a sound effect processing circuit 330 and a digital audio processing circuit 340;
the first input terminal F1 of the audio processing circuit 330 is electrically connected to the second output terminal of the main control chip 310, the second input terminal F2 of the audio processing circuit 330 is electrically connected to the first output terminal E2 of the analog audio processing circuit 320, and the output terminal F4 of the audio processing circuit 330 is electrically connected to the fourth input terminal E3 of the analog audio processing circuit 320;
the input end of the digital audio processing circuit 340 is electrically connected to the digital audio signal input interface 102, and the output end of the digital audio processing circuit 340 is electrically connected to the third input end F3 of the sound effect processing circuit 330.
Specifically, the digital audio processing circuit 340 directly receives a digital audio signal, such as an HDMI signal, a coaxial signal, or an optical fiber signal. Illustratively, the digital audio processing circuit 340 may include a CS8422 digital audio processor capable of providing ultra-low jitter clock recovery and a high degree of anti-jitter for incoming audio streams without the use of any external loop filter components. The CS8422 digital audio processor is configured to receive a digital audio signal and output the digital audio signal to the audio processing circuit 330, and the audio processing circuit 330 includes a DSP audio processor, and performs audio processing on the received audio signal to restore and enhance the reality and comfort of sound to the maximum extent. Illustratively, if the audio with sound effect is required to be output, a plurality of audio output effects, such as mixing, 3D surround, virtual bass, etc., can be realized by adjusting the sound effect processing circuit 330 to meet different hearing effects of the user.
Optionally, on the basis of the above-mentioned embodiment, with continued reference to fig. 2, the microphone receiving circuit 410 includes a wireless microphone receiving circuit 410 and a wired microphone receiving circuit 420;
the input end of the wireless microphone receiving circuit 410 is connected with the wireless microphone in a communication way, and the first output end of the wireless microphone receiving circuit 410 is electrically connected with the second input end E4 of the analog audio processing circuit 320;
the input terminal of the microphone receiving circuit 420 is electrically connected to the microphone input interface, and the output terminal of the microphone receiving circuit 420 is electrically connected to the third input terminal E5 of the analog audio processing circuit 320.
Specifically, the wireless microphone receiving circuit 410 is wirelessly connected to the wireless microphone, and is configured to convert an acoustic signal input by the wireless microphone into an electrical signal; the wired microphone receiving circuit 420 is connected to the analog audio processing circuit 320 via a wired microphone input interface in a wired manner, and is configured to convert an acoustic signal input by a wired microphone into an electrical signal. Illustratively, when the range of motion that the user needs is large, the wireless microphone can be selected to be wirelessly connected with the multifunctional sound system provided in this embodiment, the user inputs an acoustic signal through the wireless microphone, the wireless microphone receiving circuit 410 converts the acoustic signal into an electrical signal and outputs the electrical signal to the analog audio processing circuit 320, the analog audio processing circuit 320 converts the received electrical signal into a digital electrical signal and performs sound effect processing through the sound effect processing circuit 330, the analog audio processing circuit 320 outputs the digital electrical signal processed by the sound effect processing circuit 330 to the power amplifying circuit 50 and the speaker group 60, and the speaker group 60 converts the digital electrical signal into an acoustic signal and outputs the acoustic signal, thereby realizing the playing function of the sound.
Alternatively, with continued reference to fig. 2, on the basis of the above-described embodiment, the at least two power amplifying circuits 50 include the first power amplifying circuit 501 and the second power amplifying circuit 502, and the at least two speaker groups 60 include the first speaker group 601 and the second speaker group 602;
the input end of the first power amplification circuit 501 is electrically connected to the second output end E6 of the analog audio processing circuit 320, and the output end of the first power amplification circuit 501 is electrically connected to the first speaker group 601;
the input terminal of the second power amplifier circuit 502 is electrically connected to the third output terminal E7 of the analog audio processing circuit 320, and the output terminal of the second power amplifier circuit 502 is electrically connected to the second speaker group 602.
Specifically, the first power amplifier circuit 501 power-amplifies the digital electrical signal output by the analog audio processing circuit 320 to drive the first speaker group 601, where the first speaker group 601 is configured to convert the electrical signal output by the first power amplifier circuit 501 into an acoustic signal and output the acoustic signal; the second power amplifying circuit 502 performs power amplification on the digital electrical signal output by the analog audio processing circuit 320 to drive the second speaker group 602, and the second speaker group 602 is configured to convert the electrical signal output by the second power amplifying circuit 502 into an acoustic signal and output the acoustic signal.
Optionally, fig. 3 is a schematic structural diagram of another multifunctional sound system provided by the present invention. On the basis of the above embodiment, referring to fig. 3, the multifunctional sound system further includes a power amplifier protection circuit 70; the power amplifier protection circuit 70 is electrically connected to at least two power amplifier circuits 50, respectively.
Specifically, the input end of the power amplifier protection circuit 70 is electrically connected to the signal output end of the main control chip 310, and the main control chip 310 outputs a control signal to drive the power amplifier protection circuit 70 to normally operate. The output end of the power amplifier protection circuit 70 is electrically connected to the non-inverting input end of the operational amplifier in the first power amplification circuit 501 and the non-inverting input end of the operational amplifier in the second power amplification circuit 502, respectively, so as to protect the power amplification circuits. For example, when the user does not operate properly or the volume is too large, the output power of the power amplifier circuit is far higher than the rated power, which causes the power amplifier circuit to be in a high-voltage and high-current environment for a long time, and therefore, the power amplifier protection circuit 70 needs to be used for protecting the power amplifier circuit to reduce the failure of the power amplifier circuit or the speaker group.
Optionally, fig. 4 is a schematic structural diagram of another multifunctional sound system provided by the present invention. On the basis of the above embodiment, referring to fig. 4, the power amplifier protection circuit 70 includes a first voltage regulator VD1, a first resistor R1, a second resistor R2, a third resistor R3, a first triode Q1, and a first capacitor C1;
the negative electrode of the first voltage-regulator tube VD1 is electrically connected with a power supply, the positive electrode of the first voltage-regulator tube VD1 is electrically connected with the second end of the first triode Q1 through a first resistor R1, the first end of the first triode Q1 is electrically connected with the signal output end of the main control chip 310 through a second resistor R2, and the third end of the first triode Q1 is grounded;
a first terminal of the third resistor R3 is electrically connected to a first terminal of the first transistor Q1.
Specifically, the external power supply voltage provides power supply voltage for the first triode Q1 through the first voltage regulator VD1 and the first resistor R1, the second resistor R2 is a current-limiting resistor, the main control chip 310 outputs a driving control signal, and the first triode Q1 is driven to be turned on or turned off through the second resistor R2.
Optionally, the power amplifier protection circuit further includes a second triode Q2, a third triode Q3, a second voltage regulator VD2, a diode D, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a second capacitor C2;
a first end of a second triode Q2 is electrically connected with a power supply through a fourth resistor R4 and a second voltage regulator VD2 in sequence, a second end of the second triode Q2 is electrically connected with the power supply through a fifth resistor R5 and a diode D in sequence, and a third end of the second triode Q2 is grounded;
a first end of the third triode Q3 is electrically connected with a second end of the second triode Q2 through a sixth resistor R6, a second end of the third triode Q3 is electrically connected with a first end of the first triode Q1, and a third end of the third triode Q3 is grounded;
the first terminal of the second capacitor C2 is electrically connected to the cathode of the diode D, and the second terminal of the second capacitor C2 is grounded.
Specifically, the second voltage regulator VD2 is used for keeping the input voltage of the external power supply constant, and preventing the fluctuation of the input voltage from breaking down the second triode Q2, and the fourth resistor R4 is a current-limiting resistor, and preventing the input current from being too large and burning the second triode Q2. The voltage signal output by the second triode Q2 drives the third triode Q3 to be turned on or off through the sixth resistor R6, and the voltage signal output by the third triode Q3 and the driving control signal output by the main control chip 310 provide a driving signal for the first triode Q1 together, so as to improve the driving capability of the main control chip. When the multifunctional sound system is in a power-on period, a software program stored in the main control chip 310 is mainly used for protection so as to protect the power amplification circuit; when the multifunctional sound system is in a power failure period, the power amplifier protection circuit is used for main protection, and the protection function is realized by controlling the input voltage of the power amplifier circuit.
Optionally, fig. 5 is a schematic structural diagram of an analog audio signal input interface provided by the present invention. On the basis of the above embodiment, referring to fig. 5, the analog audio signal input interface includes an AUX input interface 1011, a bluetooth input interface 1012, and a USB input interface 1013;
the AUX input interface 1011 is electrically connected to a first end of a seventh resistor R7 through a third capacitor C3, a second end of the seventh resistor R7 is electrically connected to an inverting input terminal of the first operational amplifier OP1, a non-inverting input terminal of the first operational amplifier OP1 is electrically connected to a power supply through an eighth resistor R8, and an output terminal of the first operational amplifier OP1 is electrically connected to the AUX receiving terminal 1 of the main control chip 310 through a ninth resistor R9;
the bluetooth input interface 1012 is electrically connected to the input terminal a1 of the bluetooth module 20, and the output terminal a2 of the bluetooth module 20 is electrically connected to the bluetooth receiving terminal 2 of the main control chip 310 through the fourth capacitor C4;
the USB input interface 1013 is electrically connected to the USB receiving end 3 of the main control chip 310 through a data line.
Specifically, the AUX input interface 1011 is configured to access an AUX signal, for example, the AUX input interface 1011 may be a left channel signal interface, the left channel signal is filtered by the third capacitor C3 and the seventh resistor R7, the first operational amplifier OP1 amplifies the filtered left channel signal and outputs the amplified left channel signal to the AUX receiving terminal 1 of the main control chip 310, where the AUX receiving terminal 1 is a left channel signal receiving terminal. The main control chip 310 converts the received left channel signal into a digital electrical signal. The bluetooth input interface 1012 is used for accessing a bluetooth signal, the bluetooth module 20 receives the bluetooth signal, the bluetooth signal is filtered by the fourth capacitor C4 and then output to the bluetooth receiving terminal 2 of the main control chip 310, and the main control chip 310 converts the received bluetooth signal into a digital electrical signal. The USB input interface 1013 is connected to the USB receiving end 3 of the main control chip 310 through a data line, so as to exchange data between the terminal device and the multifunctional sound system provided in this embodiment.
Optionally, fig. 6 is a schematic structural diagram of a digital audio signal input interface provided by the present invention. On the basis of the above embodiment, referring to fig. 4 and fig. 6, the digital audio signal input interface 102 includes an optical fiber input interface 1021, an HDMI input interface 1022, and a coaxial input interface 1023; the digital audio processing circuit 340 includes a control chip UA;
the optical fiber input interface 1021 is electrically connected with a first input end of a second operational amplifier OP2, a second input end of the second operational amplifier OP2 is grounded, an output end of the second operational amplifier OP2 is electrically connected with a tenth resistor R10, a fifth capacitor C5 and a sixth capacitor C6 in sequence, and a second end of the sixth capacitor C6 is electrically connected with an optical fiber signal receiving end 11 of the control chip UA;
the HDMI input interface 1022 is electrically connected to the HDMI signal receiving terminal 22 of the control chip UA through a seventh capacitor C7, a first end of a seventh capacitor C7 is grounded through an eighth capacitor C8, and a second end of a seventh capacitor C7 is grounded through an eleventh resistor R11;
the coaxial input interface 1023 is electrically connected with a ninth capacitor R9 and a twelfth resistor R12 in sequence, a second end of the twelfth resistor R12 is electrically connected with an input end of a first inverter CM1, an output end of the first inverter CM1 is electrically connected with an input end of a second inverter CM2, an output end of the second inverter CM2 is electrically connected with a first end of a tenth capacitor C10, a second end of the tenth capacitor C10 is electrically connected with a first end of a thirteenth resistor R13, a second end of the thirteenth resistor R13 is electrically connected with a coaxial signal receiving end 33 of the control chip UA, a first end of the ninth capacitor C9 is electrically connected with a first end of an eleventh capacitor C11, a second end of the eleventh capacitor C11 is grounded, a first end of the fourteenth resistor R14 is electrically connected with a first end of the ninth capacitor C9, and a second end of the fourteenth resistor R14 is grounded.
Specifically, the optical fiber input interface 1021 is configured to input an optical fiber audio signal, the second operational amplifier OP2 amplifies the received optical fiber audio signal, and then filters the amplified optical fiber audio signal through the tenth resistor R10, the fifth capacitor C5, and the sixth capacitor C6, and the optical fiber signal receiving end 11 of the control chip UA converts the received filtered optical fiber audio signal into a digital audio signal and outputs the digital audio signal. The HDMI input interface 1022 is configured to access an HDMI audio signal, the seventh capacitor C7 is configured to filter noise in the input HDMI audio signal, and the HDMI signal receiving terminal 22 of the control chip UA converts the received HDMI audio signal into a digital audio signal and outputs the digital audio signal. The coaxial input interface 1023 is used for accessing a coaxial cable audio signal, the ninth capacitor R9 and the twelfth resistor R12 are used for filtering the input coaxial cable audio signal, the first inverter CM1 is connected in series with the second inverter CM2 and is used for shaping the waveform of the filtered coaxial cable audio signal and realizing audio amplification of the coaxial cable audio signal, the tenth capacitor C10 and the thirteenth resistor R13 are used for filtering the coaxial cable audio signal output by the second inverter CM2, the coaxial signal receiving end 33 of the control chip UA receives the filtered coaxial cable audio signal, and the control chip UA converts the filtered coaxial cable audio signal into a digital audio signal for output. The control chip UA can convert the input optical fiber audio signal, HDMI audio signal or coaxial cable audio signal into a corresponding digital audio signal and then decode the digital audio signal into an analog audio signal, so as to implement the audio processing circuit 330 to perform audio processing on the input optical fiber audio signal, HDMI audio signal or coaxial cable audio signal.
The embodiment of the utility model provides a receive the audio signal of microphone input through microphone receiving circuit to convert audio signal into the signal of telecommunication, signal processing circuit converts the received signal of telecommunication, amplifies the signal of telecommunication after will converting by power amplification circuit, and the signal of telecommunication after the speaker group received and amplified, and the signal of telecommunication after will amplifying converts into acoustic signal output, realizes the audio playback function. Through setting up a plurality of input interface, can realize the input of multiple signal, can also realize bluetooth instant music through the bluetooth module in addition. The embodiment of the utility model provides a technical scheme makes the stereo set function obtain expanding, has realized the most genuine multi-functional sound system.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A multifunctional sound system is characterized by comprising a plurality of input interfaces, a Bluetooth module, a signal processing circuit, a microphone receiving circuit, at least two power amplifying circuits and at least two loudspeaker sets;
the plurality of input interfaces comprise an analog audio signal input interface and a digital audio signal input interface, the analog audio signal input interface is electrically connected with the input end of the Bluetooth module, and the digital audio signal input interface is electrically connected with the first input end of the signal processing circuit;
the output end of the Bluetooth module is electrically connected with the second input end of the signal processing circuit;
the input end of the microphone receiving circuit is used for receiving audio signals, and the output end of the microphone receiving circuit is electrically connected with the third input end of the signal processing circuit;
the at least two power amplifying circuits are in one-to-one correspondence with the at least two loudspeaker sets, the input ends of the power amplifying circuits are electrically connected with the output ends of the signal processing circuits, and the output ends of the power amplifying circuits are electrically connected with the corresponding loudspeaker sets.
2. The multi-function sound system of claim 1, wherein the signal processing circuit comprises a main control chip and an analog audio processing circuit;
the first input end of the analog audio processing circuit is electrically connected with the first output end of the main control chip, the input end of the main control chip is electrically connected with the output end of the Bluetooth module, and the analog audio processing circuit is used for converting analog audio signals output by the Bluetooth module into digital audio signals.
3. The multi-function sound system of claim 2, wherein the signal processing circuit further comprises a sound effect processing circuit and a digital audio processing circuit;
the first input end of the sound effect processing circuit is electrically connected with the second output end of the main control chip, the second input end of the sound effect processing circuit is electrically connected with the first output end of the analog audio processing circuit, and the output end of the sound effect processing circuit is electrically connected with the fourth input end of the analog audio processing circuit;
the input end of the digital audio processing circuit is electrically connected with the digital audio signal input interface, and the output end of the digital audio processing circuit is connected with the third input end of the sound effect processing circuit.
4. The multi-function sound system of claim 3, wherein the microphone receiving circuit comprises a wireless microphone receiving circuit and a wired microphone receiving circuit;
the input end of the wireless microphone receiving circuit is in communication connection with a wireless microphone, and the first output end of the wireless microphone receiving circuit is electrically connected with the second input end of the analog audio processing circuit;
the input end of the wired microphone receiving circuit is electrically connected with the wired microphone input interface, and the output end of the wired microphone receiving circuit is electrically connected with the third input end of the analog audio processing circuit.
5. The multi-function sound system of claim 2, wherein the at least two power amplification circuits comprise a first power amplification circuit and a second power amplification circuit, and the at least two speaker groups comprise a first speaker group and a second speaker group;
the input end of the first power amplifying circuit is electrically connected with the second output end of the analog audio processing circuit, and the output end of the first power amplifying circuit is electrically connected with the first loudspeaker set;
the input end of the second power amplifying circuit is electrically connected with the third output end of the analog audio processing circuit, and the output end of the second power amplifying circuit is electrically connected with the second loudspeaker set.
6. The multi-functional sound system of claim 1, further comprising a power amplifier protection circuit;
the power amplifier protection circuit is electrically connected with the at least two power amplifying circuits respectively.
7. The multifunctional sound system of claim 6, wherein the power amplifier protection circuit comprises a first voltage regulator tube, a first resistor, a second resistor, a third resistor, a first triode, and a first capacitor;
the negative electrode of the first voltage-regulator tube is electrically connected with a power supply, the positive electrode of the first voltage-regulator tube is electrically connected with the second end of the first triode through the first resistor, the first end of the first triode is electrically connected with the signal output end of the main control chip through the second resistor, and the third end of the first triode is grounded;
and the first end of the third resistor is electrically connected with the first end of the first triode.
8. The multi-functional sound system of claim 7, characterized in that the power amplifier protection circuit further comprises a second triode, a third triode, a second voltage regulator tube, a diode, a fourth resistor, a fifth resistor, a sixth resistor and a second capacitor;
a first end of the second triode is electrically connected with a power supply sequentially through the fourth resistor and the second voltage regulator tube, a second end of the second triode is electrically connected with the power supply sequentially through the fifth resistor and the diode, and a third end of the second triode is grounded;
the first end of the third triode is electrically connected with the second end of the second triode through the sixth resistor, the second end of the third triode is electrically connected with the first end of the first triode, and the third end of the third triode is grounded;
the first end of the second capacitor is electrically connected with the cathode of the diode, and the second end of the second capacitor is grounded.
9. The multi-function sound system of claim 2, wherein the analog audio signal input interface comprises an AUX input interface, a bluetooth input interface, and a USB input interface;
the AUX input interface is electrically connected with a first end of a seventh resistor through a third capacitor, a second end of the seventh resistor is electrically connected with an inverting input end of a first operational amplifier, a non-inverting input end of the first operational amplifier is electrically connected with a power supply through an eighth resistor, and an output end of the first operational amplifier is electrically connected with an AUX receiving end of the main control chip through a ninth resistor;
the Bluetooth input interface is electrically connected with the input end of the Bluetooth module, and the output end of the Bluetooth module is electrically connected with the Bluetooth receiving end of the main control chip through a fourth capacitor;
the USB input interface is electrically connected with a USB receiving end of the main control chip through a data line.
10. The multi-function sound system of claim 3, wherein the digital audio signal input interface comprises a fiber optic input interface, an HDMI input interface, and a coaxial input interface; the digital audio processing circuit comprises a control chip;
the optical fiber input interface is electrically connected with a first input end of a second operational amplifier, a second input end of the second operational amplifier is grounded, an output end of the second operational amplifier is sequentially electrically connected with a tenth resistor, a fifth capacitor and a sixth capacitor, and a second end of the sixth capacitor is electrically connected with an optical fiber signal receiving end of the control chip;
the HDMI input interface is electrically connected with an HDMI signal receiving end of the control chip through a seventh capacitor, a first end of the seventh capacitor is grounded through an eighth capacitor, and a second end of the seventh capacitor is grounded through an eleventh resistor;
the coaxial input interface is sequentially electrically connected with a ninth capacitor and a twelfth resistor, the second end of the twelfth resistor is electrically connected with the input end of a first phase inverter, the output end of the first phase inverter is electrically connected with the input end of a second phase inverter, the output end of the second phase inverter is electrically connected with the first end of a tenth capacitor, the second end of the tenth capacitor is electrically connected with the first end of a thirteenth resistor, the second end of the thirteenth resistor is electrically connected with the coaxial signal receiving end of the control chip, the first end of the ninth capacitor is electrically connected with the first end of an eleventh capacitor, the second end of the eleventh capacitor is grounded, the first end of a fourteenth resistor is electrically connected with the first end of the ninth capacitor, and the second end of the fourteenth resistor is grounded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921627760.XU CN210274513U (en) | 2019-09-27 | 2019-09-27 | Multifunctional sound system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921627760.XU CN210274513U (en) | 2019-09-27 | 2019-09-27 | Multifunctional sound system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114697691A (en) * | 2020-12-31 | 2022-07-01 | 广州艾美网络科技有限公司 | Integrated audio and video interaction equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114697691A (en) * | 2020-12-31 | 2022-07-01 | 广州艾美网络科技有限公司 | Integrated audio and video interaction equipment |
| CN114697691B (en) * | 2020-12-31 | 2024-01-19 | 广州艾美网络科技有限公司 | Integrated audio/video interaction equipment |
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