Multi-input sound equipment control circuit

Abstract

The utility model relates to the technical field of sound equipment control, and provides a multi-input sound equipment control circuit, which comprises a control module, an input adjusting module and a power supply module, the power supply module supplies power to the whole control circuit, the input adjusting module comprises a plurality of volume adjusting circuits, and each volume adjusting circuit comprises a rheostat RV1, a resistor R151 and a capacitor C179. The first end of the rheostat R1 is connected with a 3.3 V power supply, the second end of the rheostat RV1 is grounded, the adjusting end of the rheostat RV is connected with the first end of the resistor R151, the second end of the resistor R151 is connected with the control module, the second end of the resistor R151 is further grounded through the capacitor C179, the adjusting end of the rheostat RV serves as an external control end, and the connection modes of all volume adjusting circuits are the same. And a plurality of volume adjusting circuits are arranged in the input adjusting module, so that the diversity of sound control is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to sound control technical field, specifically, relate to a kind of sound control circuit of multiple input quantity. BACKGROUND

[0002] With the continuous progress of sound technology, modern sound system has not only limited to simple sound amplification and transmission, but gradually developed into the complex system of audio processing, control, regulation and effect enhancement. This development trend makes sound control circuit need to be able to handle more input signals, and have higher flexibility and adjustability.

[0003] In addition, with the continuous development of digital technology, modern sound system has begun to develop in the direction of digitization, intelligentization and networking. This also provides new ideas and technical means for the design of sound control circuit. Future sound control circuit can be more integrated, intelligent, and have stronger network function and remote control ability to meet the continuous pursuit of high-quality sound experience of users. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of sound control circuit of multiple input quantity, solve the technical problem that sound control cannot handle more input signals in prior art.

[0005] The technical scheme of the utility model is as follows:

[0006] A kind of sound control circuit of multiple input quantity, including control module, input regulation module and power module, the power module is the power supply of entire control circuit, the input regulation module includes multiple volume regulation circuit, the volume regulation circuit includes variable resistor RV1, resistance R151, and capacitor C179, the first end of the variable resistor R1 is connected 3.3V power supply, the second end of the variable resistor RV1 is grounded, the adjustment end of the variable resistor RV is connected the first end of the resistance R151, the second end of the resistance R151 is connected the control module, the second end of the resistance R151 is also grounded by the capacitor C179, the adjustment end of the variable resistor RV is as external control end, the connection mode of all volume regulation circuit is same.

[0007] Further, the volume regulation circuit includes eight, respectively for controlling music bass adjustment, music treble adjustment, music volume adjustment, microphone bass adjustment, microphone treble adjustment, microphone volume adjustment, reverberation volume adjustment and musical instrument volume adjustment.

[0008] Further, the power module comprises a battery, a voltage stabilizing chip U2, a resistor R171, a resistor R172, a resistor R173, a resistor R174, a triode Q1, a voltage stabilizing diode D1 and a thyristor D2, an output end of the voltage stabilizing chip U2 is connected with the battery, the output end of the voltage stabilizing chip U2 is connected with the resistor R171 and the resistor R172 in sequence and then grounded, a connecting point of the resistor R171 and the resistor R172 is connected with the cathode of the voltage stabilizing diode D1, the cathode of the voltage stabilizing diode D1 is grounded through the resistor R174, the cathode of the voltage stabilizing diode D1 is connected with the control end of the thyristor D2, the cathode of the thyristor D2 is grounded, the anode of the thyristor D2 is connected with the base of the triode Q1, the collector of the triode Q1 is connected with the output end of the voltage stabilizing chip U2, the collector of the triode Q1 is connected with the base of the triode Q1 through the resistor R173, and the emitter of the triode Q1 outputs a 3.3V power supply.

[0009] Further, the control module comprises a main control chip U1 and a microphone control chip U9, and the main control chip U1 is connected with the microphone control chip U9.

[0010] Further, the control module comprises a main control chip U1 and a microphone control chip U9, and the main control chip U1 is connected with the microphone control chip U9.

[0011] The working principle and beneficial effects of the utility model are as follows:

[0012] In this invention, multiple volume control circuits are incorporated into the input adjustment module, increasing the versatility of audio control. The first terminal of the variable resistor RV1 is connected to a 3.3V power supply, and the second terminal is grounded. The adjustment terminal is connected to the first terminal of resistor R151, forming an adjustable voltage divider circuit. The second terminal of resistor R151 is not only connected to the control module but also grounded through capacitor C179, which acts as a filter to ensure signal purity. External control signals are input through the adjustment terminal of the variable resistor RV1, changing its resistance and thus adjusting the output voltage of the voltage divider circuit. This voltage is read by the control module and converted into corresponding volume control commands.

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0014] Figure 1 This is a circuit diagram of the input adjustment module in this utility model;

[0015] Figure 2 This is a circuit diagram of the power supply module in this utility model;

[0016] Figure 3 This is a circuit diagram of the control module in this utility model;

[0017] Figure 4 This is the circuit diagram of the power amplifier module in this utility model. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0019] Example 1

[0020] This embodiment proposes a multi-input audio control circuit, including a control module, an input adjustment module, and a power supply module. The power supply module supplies power to the entire control circuit, and the input adjustment module includes multiple volume adjustment circuits, such as... Figure 1 As shown, the volume control circuit includes a variable resistor RV1, a resistor R151, and a capacitor C179. The first terminal of the variable resistor R1 is connected to a 3.3V power supply, and the second terminal of the variable resistor RV1 is grounded. The adjustment terminal of the variable resistor RV is connected to the first terminal of the resistor R151, and the second terminal of the resistor R151 is connected to the control module. The second terminal of the resistor R151 is also grounded through the capacitor C179. The adjustment terminal of the variable resistor RV serves as an external control terminal. All volume control circuits are connected in the same way.

[0021] In this embodiment, in the volume adjustment circuit, the first end of the variable resistor RV1 is connected to the 3.3V power supply, the second end is grounded, and the adjustment end is connected to the first end of the resistor R151, forming a adjustable voltage dividing circuit. The second end of the resistor R151 is not only connected to the control module, but also grounded through the capacitor C179, which plays a filtering role to ensure the purity of the signal. The external control signal is input through the adjustment end of the variable resistor RV1, changing its resistance value, thereby adjusting the output voltage of the voltage dividing circuit, which is read by the control module and converted into the corresponding volume control instruction.

[0022] In one embodiment, as shown in Figure 1 The input adjustment module includes eight volume adjustment circuits with the same structure, which are respectively used to accurately control the bass of music, the treble of music, the volume of music, the bass of microphone, the treble of microphone, the volume of microphone, the volume of reverb, and the volume of musical instrument. Through the eight independent volume adjustment circuits, users can flexibly and accurately adjust multiple parameters of different audio sources to meet diversified sound control needs.

[0023] Further, the multiple input quantities are transmitted to the control module in the form of multiple different voltage signals through the variable resistor voltage dividing. In the analog input design, unstable power supply is a common problem that affects input accuracy. Therefore, in the power supply module, an overvoltage monitoring function is added to the 3.3V power supply voltage of the input adjustment module.

[0024] As shown in Figure 2 The power supply module includes a battery, a voltage stabilizing chip U2, resistors R171, R172, R173, R174, a triode Q1, a voltage stabilizing diode D1, and a thyristor D2. The output end of the voltage stabilizing chip U2 is connected to the battery. The output end of the voltage stabilizing chip U2 is connected in series with the resistors R171 and R172, and then grounded. The series connection point of the resistors R171 and R172 is connected to the cathode of the voltage stabilizing diode D1. The cathode of the voltage stabilizing diode D1 is grounded through the resistor R174. The cathode of the voltage stabilizing diode D1 is connected to the control end of the thyristor D2. The cathode of the thyristor D2 is grounded. The anode of the thyristor D2 is connected to the base of the triode Q1. The collector of the triode Q1 is connected to the output end of the voltage stabilizing chip U2. The collector of the triode Q1 is connected to the base of the triode Q1 through the resistor R173. The emitter of the triode Q1 outputs a 3.3V power supply.

[0025] In this embodiment, the battery provides input power for the voltage regulator chip U2, and the output of U2 outputs a preliminary stable voltage. This voltage is then divided by the series-connected resistors R171 and R172, and a reference voltage is generated at the connection point. This reference voltage is connected to the cathode of the voltage regulator diode D1, and D1 acts as a reference voltage source to help stabilize the operating point of the entire circuit. At the same time, the cathode of D1 is connected to the control terminal of the thyristor D2 through the resistor R174. This configuration forms a voltage detection and control loop, when the reference voltage exceeds the voltage regulation value of D1, D1 is turned on, triggering the thyristor D2. The anode of the thyristor D2 is connected to the base of the transistor Q1, when the thyristor D2 is turned on, it allows current to flow from the anode to the cathode, thereby activating the transistor Q1. The transistor Q1 is used as a switch here, its collector is connected to the output of the voltage regulator chip U2, and feedback is provided through the resistor R173, forming a negative feedback loop, which helps to stabilize the output voltage. R173 also provides a bias current for the base of Q1. Finally, the emitter of Q1 outputs a 3.3V power supply after stabilization.

[0026] Further, as shown in Figure 3 ,

[0027] The control module includes a main control chip U1 and a microphone control chip U9, and the main control chip U1 is connected with the microphone control chip U9.

[0028] In this embodiment, the main control chip U1 is used for processing and adjusting the signals of the entire circuit, and the microphone control chip U9 receives a form of sound source through an external microphone module.

[0029] Further, the power amplifier module is also included in this embodiment, as shown in Figure 4 , the power amplifier module includes a power amplifier chip U5 and loudspeakers SPR and SPL, the sound input end one of the power amplifier chip U5 is connected with the sound output end one of the main control chip U1 and the microphone control chip U9 in sequence through the capacitor C32, the resistor R125 and the capacitor C98, the sound input end two of the power amplifier chip U5 is connected with the sound output end two of the main control chip U1 and the microphone control chip U9 in sequence through the capacitor C44, the resistor R127 and the capacitor C97, the enable end of the power amplifier chip U5 is connected with the main control chip U1 in sequence through the resistor R49 and the resistor R24, the control end of the power amplifier chip U5 is connected with the main control chip U1 in sequence through the resistor R37 and the diode D6, the sound output end one of the power amplifier chip U5 is connected with the loudspeaker SPR, and the sound output end two of the power amplifier chip U5 is connected with the loudspeaker SP2.

[0030] In this embodiment, the power amplifier chip U5 is responsible for receiving sound signals, amplifying these signals, and outputting the amplified signals to the speaker to produce sound. The sound input end one of the power amplifier chip U5 is connected to the sound output end one of the master control chip U1 and the microphone control chip U9 through the combination of the capacitor C32, the resistor R125, the capacitor C98, the capacitor C104, and the resistor R128. This combination circuit plays a role in filtering and impedance matching, ensuring that the sound signals can be transmitted cleanly and stably to the power amplifier chip U5. Similarly, the combination of the capacitor C44, the resistor R127, the capacitor C97, the capacitor C105, and the resistor R130 also plays a role in filtering and impedance matching. The enable end of the power amplifier chip U5 is used to control the opening and closing of the power amplifier chip. When the master control chip U1 outputs the corresponding control signal, the control signal can be stably transmitted to the enable end of the power amplifier chip U5 through the two resistors. The control end of the power amplifier chip U5 is used to adjust the gain, volume, or other parameters of the power amplifier chip. The diode D6 here plays a role in the protection circuit, preventing the control signal from being too large or too small to damage the power amplifier chip.

[0031] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-input sound control circuit, characterized by comprising: It includes control module, input adjustment module and power module, the power module supplies power for the whole control circuit, the input adjustment module includes multiple volume adjustment circuits, the volume adjustment circuit includes variable resistor RV1, resistor R151 and capacitor C179, the first end of the variable resistor R1 is connected with 3.3V power supply, the second end of the variable resistor RV1 is grounded, the adjustment end of the variable resistor RV is connected with the first end of the resistor R151, the second end of the resistor R151 is connected with the control module, the second end of the resistor R151 is also grounded through the capacitor C179, the adjustment end of the variable resistor RV is used as external control end, and the connection modes of all volume adjustment circuits are same.

2. A multi-input sound control circuit according to claim 1, wherein The volume adjustment circuit includes eight, which are used for controlling music bass adjustment, music treble adjustment, music volume adjustment, microphone bass adjustment, microphone treble adjustment, microphone volume adjustment, reverberation volume adjustment and musical instrument volume adjustment respectively.

3. A multi-input sound control circuit according to claim 1, wherein The power module includes battery, voltage stabilizing chip U2, resistor R171, resistor R172, resistor R173, resistor R174, triode Q1, voltage stabilizing diode D1 and thyristor D2, the output end of the voltage stabilizing chip U2 is connected with battery, the output end of the voltage stabilizing chip U2 is grounded after being connected with the resistor R171 and the resistor R172 in sequence, the series connection point of the resistor R171 and the resistor R172 is connected with the cathode of the voltage stabilizing diode D1, the cathode of the voltage stabilizing diode D1 is grounded through the resistor R174, the cathode of the voltage stabilizing diode D1 is connected with the control end of the thyristor D2, the cathode of the thyristor D2 is grounded, the anode of the thyristor D2 is connected with the base of the triode Q1, the collector of the triode Q1 is connected with the output end of the voltage stabilizing chip U2, the collector of the triode Q1 is connected with the base of the triode Q1 through the resistor R173, and the emitter of the triode Q1 outputs 3.3V power supply.

4. A multi-input sound control circuit according to claim 1, wherein The control module includes main control chip U1 and microphone control chip U9, and the main control chip U1 is connected with the microphone control chip U9.

5. A multi-input sound control circuit according to claim 4, wherein It also includes power amplifier module, the power amplifier module includes power amplifier chip U5 and loudspeakers SPR and SPL, the sound input end one of the power amplifier chip U5 is connected with the sound output end one of the main control chip U1 and the microphone control chip U9 in sequence through capacitor C32, resistor R125 and capacitor C98, the sound input end two of the power amplifier chip U5 is connected with the sound output end two of the main control chip U1 and the microphone control chip U9 in sequence through capacitor C44, resistor R127 and capacitor C97, the enable end of the power amplifier chip U5 is connected with the main control chip U1 in sequence through resistor R49 and resistor R24, the control end of the power amplifier chip U5 is connected with the main control chip U1 in sequence through resistor R37 and diode D6, and the sound output end one of the power amplifier chip U5 is connected with the loudspeaker SPR, and the sound output end two of the power amplifier chip U5 is connected with the loudspeaker SPL.

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