Noise reduction type digital sound console control circuit

Abstract

The utility model relates to the technical field of electronic circuits, and particularly discloses a noise reduction type digital sound console control circuit which comprises a single chip microcomputer master control circuit, an audio input circuit, a left channel noise reduction circuit, a right channel noise reduction circuit, an audio output circuit and a power management circuit. The single-chip microcomputer main control circuit is electrically connected with the audio input circuit, the left channel noise reduction circuit, the right channel noise reduction circuit and the power management circuit, and the left channel noise reduction circuit and the right channel noise reduction circuit are electrically connected with the audio output circuit. According to the utility model, the left channel noise reduction circuit and the right channel noise reduction circuit are arranged to respectively carry out noise reduction processing on the accessed original audio signal, and finally the audio signal is output through the audio output circuit, so that better tone and texture can be restored, the audio performance effect is good, and the use requirements of users are met.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to a noise reduction type digital mixing console control circuit. Background Art

[0002] Mixing consoles are generally categorized as analog or digital, depending on how they process audio signals. Compared to analog processing, digital technology offers significant advantages in audio editing, synthesis, effects processing, storage, transmission, networking, and affordability. Therefore, the transition from analog to digital is an inevitable trend in the future of digital audio technology. Mixing consoles are signal processing devices that amplify raw signals, compensate for audio, and perform other adjustments, placing strict demands on noise control. However, existing digital mixers suffer from inferior audio performance compared to traditional analog products, failing to reproduce the distinctive timbre and texture beyond the analog curve, making them difficult to meet user needs. Therefore, improvements to existing digital mixer control circuits are necessary. Utility Model Content

[0003] The technical problem to be solved by the present invention is that, in response to the above-mentioned defects of the prior art, a noise reduction type digital mixing console control circuit is provided. By setting a left channel noise reduction circuit and a right channel noise reduction circuit, the original audio signal connected is subjected to noise reduction processing respectively, and finally outputted through the audio output circuit, a better tone and texture can be restored, and the audio performance effect is good, which meets the user's use needs.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A noise reduction digital mixing console control circuit includes a single-chip microcomputer main control circuit, an audio input circuit, a left-channel noise reduction circuit, a right-channel noise reduction circuit, an audio output circuit, and a power management circuit. The single-chip microcomputer main control circuit is electrically connected to the audio input circuit, the left-channel noise reduction circuit, the right-channel noise reduction circuit, and the power management circuit, respectively. The left-channel noise reduction circuit and the right-channel noise reduction circuit are both electrically connected to the audio output circuit.

[0006] Preferably, the single-chip microcomputer main control circuit includes a single-chip microcomputer chip U1, a crystal oscillator Y1, a capacitor C1 and a capacitor C2, and the crystal oscillator Y1, the capacitor C1 and the capacitor C2 are all connected to the single-chip microcomputer chip U1.

[0007] Preferably, the audio input circuit includes an audio interface P1, the power management circuit includes a power management chip U2, a power interface J1, a capacitor C3 and a capacitor C4, the capacitor C3, the capacitor C4 and the power interface J1 are all connected to the power management chip U2, and the audio interface P1 and the power management chip U2 are both connected to the single-chip computer chip U1.

[0008] Preferably, the left channel noise reduction circuit includes an operational amplifier 3, an operational amplifier U4, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8 and an adjustable resistor RW1. The resistor R3 and the capacitor C6 are both connected to the thirty-ninth pin of the single-chip microcomputer chip U1. The operational amplifier U3 is respectively connected to the capacitor C6, the resistor R3, the resistor R5, the resistor RW1, the resistor R6, the capacitor C5, the resistor R1 and the operational amplifier U4. The resistor R2, the resistor RW1, the resistor R8 and the capacitor C8 are all connected to the resistor R7. The operational amplifier U4 is respectively connected to the resistor R8, the resistor R9, the capacitor C7 and the resistor R6. The capacitor C7 is connected to the resistor R4.

[0009] Preferably, the right channel noise reduction circuit includes an operational amplifier U5, an operational amplifier U6, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a capacitor C10, a capacitor C11, a capacitor C12 and an adjustable resistor RW2. The resistor R12 and the capacitor C9 are both connected to the thirty-eighth pin of the single-chip microcomputer chip U1. The operational amplifier U5 is respectively connected to the capacitor C9, the adjustable resistor RW2, the resistor R13, the resistor R11, the resistor R12, the resistor R10, the capacitor C10 and the resistor R14. The resistor R11, the adjustable resistor RW2, the resistor R15 and the capacitor C12 are all connected to the resistor R17. The operational amplifier U6 is respectively connected to the resistor R15, the resistor R16 and the capacitor C11. The resistor R18 is connected to the capacitor C11.

[0010] Preferably, the audio output circuit includes an audio output interface J2 and an audio output interface J3, the audio output interface J2 is connected to the output end of the operational amplifier U4 via the capacitor C7, and the audio output interface J3 is connected to the output end of the operational amplifier U6 via the capacitor C11.

[0011] By adopting the above technical solution, the utility model provides a noise reduction type digital mixer control circuit, which has the following beneficial effects: the single-chip microcomputer main control circuit in the noise reduction type digital mixer control circuit is electrically connected to the audio input circuit, the left channel noise reduction circuit, the right channel noise reduction circuit and the power management circuit respectively; the left channel noise reduction circuit and the right channel noise reduction circuit are both electrically connected to the audio output circuit; the audio output circuit is used to access the original audio signal; by setting the left channel noise reduction circuit and the right channel noise reduction circuit respectively, the accessed original audio signal is subjected to noise reduction processing, and finally output through the audio output circuit, it can restore a better tone and texture, and the audio performance effect is good, meeting the user's use needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0013] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0014] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0015] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0016] like Figure 1As shown in the circuit schematic diagram of the present invention, the noise reduction digital mixer control circuit includes a single-chip microcomputer main control circuit, an audio input circuit, a left-channel noise reduction circuit, a right-channel noise reduction circuit, an audio output circuit, and a power management circuit. The single-chip microcomputer main control circuit is electrically connected to the audio input circuit, the left-channel noise reduction circuit, the right-channel noise reduction circuit, and the power management circuit, respectively. The left-channel noise reduction circuit and the right-channel noise reduction circuit are both electrically connected to the audio output circuit. It can be understood that in actual applications, the single-chip microcomputer main control circuit, the audio input circuit, the left-channel noise reduction circuit, the right-channel noise reduction circuit, the audio output circuit, and the power management circuit can all be integrated on a single PCB circuit board, which can be installed in various power amplifier devices such as digital mixers for use, thereby achieving high-fidelity sound quality and a good user experience.

[0017] Specifically, the single-chip microcomputer main control circuit includes a single-chip microcomputer chip U1, a crystal oscillator Y1, a capacitor C1, and a capacitor C2, and the crystal oscillator Y1, the capacitor C1, and the capacitor C2 are all connected to the single-chip microcomputer chip U1; the audio input circuit includes an audio interface P1, and the power management circuit includes a power management chip U2, a power interface J1, a capacitor C3, and a capacitor C4, and the capacitor C3, the capacitor C4, and the power interface J1 are all connected to the power management chip U2, and the audio interface P1 and the power management chip U2 are all connected to the single-chip microcomputer chip U1. It can be understood that the single-chip microcomputer chip U1 adopts the AT89C51 chip, which serves as the control core of the entire circuit and centrally controls the working status of the above-mentioned left channel noise reduction circuit, right channel noise reduction circuit, audio output circuit, and power management circuit through signal reception and signal processing. The above only lists the main circuit components and their connection relationships. The remaining circuit components and their specific connection relationships are shown in the accompanying drawings, and the present invention will not repeat them.

[0018] It can be understood that the power interface J1 is used to connect to an external power supply, and the power management chip U2 adopts a 7805 chip to output a suitable working power supply to the single-chip microcomputer chip U1.

[0019] Specifically, the left channel noise reduction circuit includes an operational amplifier 3, an operational amplifier U4, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8 and an adjustable resistor RW1. The resistor R3 and the capacitor C6 are connected to the thirty-ninth pin of the single-chip microcomputer chip U1. The operational amplifier U3 is respectively connected to the capacitor C6, the resistor R3, the resistor R5, the resistor RW1, the resistor R6, the capacitor C5, the resistor R1 and the operational amplifier U4. The resistor R2, the resistor RW1, the resistor R8 and the capacitor C8 are all connected to the resistor R7. The operational amplifier U4 is respectively connected to the resistor R8, the resistor R9, the capacitor C7 and the resistor R6. The capacitor C7 is connected to the resistor R4. The right channel noise reduction circuit It includes an operational amplifier U5, an operational amplifier U6, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a capacitor C10, a capacitor C11, a capacitor C12 and an adjustable resistor RW2. The resistor R12 and the capacitor C9 are all connected to the thirty-eighth pin of the single-chip computer chip U1. The operational amplifier U5 is respectively connected to the capacitor C9, the adjustable resistor RW2, the resistor R13, the resistor R11, the resistor R12, the resistor R10, the capacitor C10 and the resistor R14. The resistor R11, the adjustable resistor RW2, the resistor R15 and the capacitor C12 are all connected to the resistor R17. The operational amplifier U6 is respectively connected to the resistor R15, the resistor R16 and the capacitor C11. The resistor R18 is connected to the capacitor C11. It can be understood that the operational amplifier 3, operational amplifier U4, operational amplifier U5, and operational amplifier U6 all use the LM358 chip, which serves as a channel electronic volume controller and is controlled by two-line serial data. The built-in reference circuit can form an electronic volume controller, and fewer peripheral circuits can be used. The volume is 0-83dB (1dB / each level), allowing each channel to be controlled independently; the audio signals are respectively connected to the microcontroller chip U1 through the audio input interface P1, and are respectively output to the above-mentioned left channel noise reduction circuit and right channel noise reduction circuit through the thirty-eighth pin and the thirty-ninth pin of the microcontroller chip U1 for noise reduction processing.

[0020] Specifically, the audio output circuit includes an audio output interface J2 and an audio output interface J3. The audio output interface J2 is connected to the output of the operational amplifier U4 via the capacitor C7, and the audio output interface J3 is connected to the output of the operational amplifier U6 via the capacitor C11. It can be understood that the operational amplifiers U4 and U6 act as post-amplifiers, and the conditioned audio signals are output via the audio output interfaces J2 and J3, respectively, and played by the corresponding speakers to which they are connected.

[0021] It can be understood that the utility model has a reasonable design and unique structure. By setting up a left-channel noise reduction circuit and a right-channel noise reduction circuit, the noise reduction processing of the original audio signal is performed respectively, and finally output through the audio output circuit, it can restore a better tone and texture, and the audio performance effect is good, which meets the user's needs.

[0022] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A noise reduction digital mixer control circuit, characterized in that: It includes a single-chip microcomputer main control circuit, an audio input circuit, a left-channel noise reduction circuit, a right-channel noise reduction circuit, an audio output circuit and a power management circuit. The single-chip microcomputer main control circuit is electrically connected to the audio input circuit, the left-channel noise reduction circuit, the right-channel noise reduction circuit and the power management circuit respectively. The left-channel noise reduction circuit and the right-channel noise reduction circuit are both electrically connected to the audio output circuit.

2. The noise reduction digital mixer control circuit according to claim 1, wherein: The single-chip microcomputer main control circuit includes a single-chip microcomputer chip U1, a crystal oscillator Y1, a capacitor C1 and a capacitor C2. The crystal oscillator Y1, the capacitor C1 and the capacitor C2 are all connected to the single-chip microcomputer chip U1.

3. The noise reduction digital mixer control circuit according to claim 2, wherein: The audio input circuit includes an audio interface P1, and the power management circuit includes a power management chip U2, a power interface J1, a capacitor C3 and a capacitor C4. The capacitor C3, the capacitor C4 and the power interface J1 are all connected to the power management chip U2, and the audio interface P1 and the power management chip U2 are both connected to the single-chip computer chip U1.

4. The noise reduction digital mixer control circuit according to claim 2, wherein: The left channel noise reduction circuit includes an operational amplifier 3, an operational amplifier U4, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8 and an adjustable resistor RW1. The resistor R3 and the capacitor C6 are both connected to the thirty-ninth pin of the single-chip microcomputer chip U1. The operational amplifier U3 is respectively connected to the capacitor C6, the resistor R3, the resistor R5, the resistor RW1, the resistor R6, the capacitor C5, the resistor R1 and the operational amplifier U4. The resistor R2, the resistor RW1, the resistor R8 and the capacitor C8 are all connected to the resistor R7. The operational amplifier U4 is respectively connected to the resistor R8, the resistor R9, the capacitor C7 and the resistor R6. The capacitor C7 is connected to the resistor R4.

5. The noise reduction digital mixer control circuit according to claim 2, wherein: The right channel noise reduction circuit includes an operational amplifier U5, an operational amplifier U6, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a capacitor C10, a capacitor C11, a capacitor C12 and an adjustable resistor RW2. The resistor R12 and the capacitor C9 are connected to the thirty-eighth pin of the single-chip microcomputer chip U1. The operational amplifier U5 is respectively connected to the capacitor C9, the adjustable resistor RW2, the resistor R13, the resistor R11, the resistor R12, the resistor R10, the capacitor C10 and the resistor R14. The resistor R11, the adjustable resistor RW2, the resistor R15 and the capacitor C12 are all connected to the resistor R17. The operational amplifier U6 is respectively connected to the resistor R15, the resistor R16 and the capacitor C11. The resistor R18 is connected to the capacitor C11.

6. The noise reduction digital mixer control circuit according to claim 3, wherein: The audio output circuit includes an audio output interface J2 and an audio output interface J3. The audio output interface J2 is connected to the output end of the operational amplifier U4 via the capacitor C7. The audio output interface J3 is connected to the output end of the operational amplifier U6 via the capacitor C11.

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