DSP (Digital Signal Processor) tuning system of vehicle-mounted sound equipment

Abstract

The utility model relates to the technical field of electronic circuits, and particularly discloses a digital signal processor (DSP) tuning system of a vehicle-mounted sound system, which comprises a DSP control circuit, an audio input circuit, a tuning circuit, a power amplifier circuit and a power supply management circuit, the tone tuning circuit is electrically connected with the DSP control circuit and the power amplifier circuit respectively, and the power management circuit is electrically connected with the DSP control circuit, the tone tuning circuit and the power amplifier circuit respectively. According to the utility model, the tuning circuit and the power amplifier circuit are additionally arranged to cooperate for tuning processing and power amplification processing, so that power amplification can be carried out on audio signals, interference signals or clutters can be filtered, high-quality audio can be output, and the whole circuit structure is relatively simple, the manufacturing cost is relatively low, and the stability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to a DSP tuning system for vehicle-mounted audio. Background Art

[0002] With the continuous development of automobile technology, automotive electronics technology, in-vehicle information technology, and sensor technologies are also gradually promoting the development of automobile technology. Car audio systems have gradually emerged in the automotive industry, and cars of all grades will be equipped with a suitable car audio system. However, the existing car audio system is not only expensive, but also easily affected by the external environment, resulting in unstable performance. Therefore, there is an urgent need to provide a DSP tuning system with simple structure, low cost and good stability. Utility Model Content

[0003] The technical problem to be solved by the utility model is that, in view of the above-mentioned defects of the prior art, a DSP tuning system for a car audio is provided, which can not only amplify the power of the audio signal, but also filter out the interference signal or clutter, and output high-quality audio, and the overall circuit structure is relatively simple, the production cost is low, and the stability is good.

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

[0005] A DSP tuning system for a vehicle audio system comprises a DSP control circuit, an audio input circuit, a tuning circuit, a power amplifier circuit and a power management circuit, wherein the audio input circuit is electrically connected to the tuning circuit, the tuning circuit is electrically connected to the DSP control circuit and the power amplifier circuit respectively, and the power management circuit is electrically connected to the DSP control circuit, the tuning circuit and the power amplifier circuit respectively.

[0006] Preferably, the DSP control circuit includes a digital signal controller U1, a program download interface JTAG, a crystal oscillator Y1, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R3 and a reset button S1, and the program download interface JTAG, the crystal oscillator Y1, the capacitor C1, the capacitor C2, the capacitor C3, the resistor R3 and the reset button S1 are all connected to the digital signal controller U1.

[0007] Preferably, the tuning circuit comprises a tuning chip U6, and a first pin, a second pin and a seventh pin of the tuning chip U6 are respectively connected to a fifteenth pin, a fourteenth pin and a sixteenth pin of the digital signal controller U1.

[0008] Preferably, the audio input circuit comprises an audio input interface J2, and the second pin and the third pin of the audio input interface J2 are both connected to the third pin of the tuning chip U6.

[0009] Preferably, the power amplifier circuit includes an operational amplifier U7, an operational amplifier U2A, an operational amplifier U2B, a player LS1, a capacitor C12 and a capacitor C14, the operational amplifier U7 is respectively connected to the tuning chip U6 and the capacitor C12, the operational amplifier U2A is respectively connected to the capacitor C12 and the operational amplifier U2B, and the capacitor C14 is respectively connected to the operational amplifier U2B and the player LS1.

[0010] Preferably, the power management circuit includes a power interface J1, a power switch SW1, a power management chip U3, a capacitor C6 and a capacitor C7, the power management chip U3 is respectively connected to the digital signal controller U1, capacitor C6, capacitor C7 and the power switch SW1, and the power switch SW1 is connected to the power interface J1.

[0011] By adopting the above technical scheme, the utility model provides a DSP tuning system for a vehicle audio system, which has the following beneficial effects: the audio input circuit in the DSP tuning system is electrically connected to the tuning circuit, the tuning circuit is electrically connected to the DSP control circuit and the power amplifier circuit respectively, the power management circuit is electrically connected to the DSP control circuit, the tuning circuit and the power amplifier circuit respectively, and by adding a tuning circuit and a power amplifier circuit to cooperate in tuning processing and power amplifier processing, not only can the audio signal be power amplified, but also the interference signal or clutter can be filtered out, when the DSP tuning system is disturbed by the external environment, the audio output by the power amplifier circuit will not be affected, and high-quality audio can be output, the overall circuit structure is relatively simple, the production cost is low, the stability is good, the user satisfaction can be greatly improved, and the user experience effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0013] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[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 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0015] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0016] like Figure 1 As shown in the circuit schematic diagram of the utility model, the DSP tuning system of the vehicle audio system includes a DSP control circuit, an audio input circuit, a tuning circuit, a power amplifier circuit and a power management circuit. The audio input circuit is electrically connected to the tuning circuit, the tuning circuit is electrically connected to the DSP control circuit and the power amplifier circuit respectively, and the power management circuit is electrically connected to the DSP control circuit, the tuning circuit and the power amplifier circuit respectively. It can be understood that in actual application, the DSP control circuit, the audio input circuit, the tuning circuit, the power amplifier circuit and the power management circuit can all be integrated on a PCB circuit board and installed in the vehicle audio system for use.

[0017] Specifically, the DSP control circuit includes a digital signal controller U1, a program download interface JTAG, a crystal oscillator Y1, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R3 and a reset button S1, and the program download interface JTAG, the crystal oscillator Y1, the capacitor C1, the capacitor C2, the capacitor C3, the resistor R3 and the reset button S1 are all connected to the digital signal controller U1. It can be understood that the digital signal controller U1 can be a TMS320F28027 chip, etc., which is used for digital signal processing and outputs corresponding control signals to control the working state of each of the above circuits.

[0018] Specifically, the tuning circuit includes a tuning chip U6, the first pin, the second pin and the seventh pin of the tuning chip U6 are respectively connected to the fifteenth pin, the fourteenth pin and the sixteenth pin of the digital signal controller U1; the audio input circuit includes an audio input interface J2, the second pin and the third pin of the audio input interface J2 are both connected to the third pin of the tuning chip U6. It can be understood that the tuning chip U6 can be a CAT5115 chip, etc., which is used to decode the audio signal and output it to the power amplifier circuit.

[0019] Specifically, the power amplifier circuit includes an operational amplifier U7, an operational amplifier U2A, an operational amplifier U2B, a player LS1, a capacitor C12 and a capacitor C14. The operational amplifier U7 is connected to the tuning chip U6 and the capacitor C12 respectively, the operational amplifier U2A is connected to the capacitor C12 and the operational amplifier U2B respectively, and the capacitor C14 is connected to the operational amplifier U2B and the player LS1 respectively. It can be understood that the operational amplifier U7 adopts a TDA2030 amplifier, and the operational amplifier U2A and the operational amplifier U2B both adopt an LM358 amplifier, which is used to amplify the power of the audio signal and then output it to the player LS1, and the player LS1 outputs the sound.

[0020] Specifically, the power management circuit includes a power interface J1, a power switch SW1, a power management chip U3, a capacitor C6 and a capacitor C7. The power management chip U3 is connected to the digital signal controller U1, the capacitor C6, the capacitor C7 and the power switch SW1 respectively, and the power switch SW1 is connected to the power interface J1. It can be understood that the power interface J1 is used to access an external power supply, and the power management chip U3 can be an AMS1117-3.3 chip for outputting a 3.3V power supply for use by the above-mentioned chips.

[0021] It can be understood that the utility model has a reasonable design and unique structure. It can not only amplify the power of audio signals, but also filter out interference signals or clutter. When the DSP tuning system is disturbed by the external environment, the audio output by the power amplifier circuit will not be affected, and it can output high-quality audio. The overall circuit structure is relatively simple, the production cost is low, and the stability is good. It can greatly improve user satisfaction and provide a good user experience.

[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. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A DSP tuning system for a car audio system, characterized in that: It includes a DSP control circuit, an audio input circuit, a tuning circuit, a power amplifier circuit and a power management circuit. The audio input circuit is electrically connected to the tuning circuit, the tuning circuit is electrically connected to the DSP control circuit and the power amplifier circuit respectively, and the power management circuit is electrically connected to the DSP control circuit, the tuning circuit and the power amplifier circuit respectively.

2. The DSP tuning system for vehicle audio according to claim 1, characterized in that: The DSP control circuit includes a digital signal controller U1, a program download interface JTAG, a crystal oscillator Y1, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R3 and a reset button S1. The program download interface JTAG, the crystal oscillator Y1, the capacitor C1, the capacitor C2, the capacitor C3, the resistor R3 and the reset button S1 are all connected to the digital signal controller U1.

3. The DSP tuning system for vehicle audio according to claim 2, characterized in that: The tuning circuit includes a tuning chip U6 , and a first pin, a second pin, and a seventh pin of the tuning chip U6 are respectively connected to a fifteenth pin, a fourteenth pin, and a sixteenth pin of the digital signal controller U1 .

4. The DSP tuning system for vehicle audio according to claim 3 is characterized in that: The audio input circuit includes an audio input interface J2, and the second pin and the third pin of the audio input interface J2 are both connected to the third pin of the tuning chip U6.

5. The DSP tuning system for vehicle audio according to claim 3 is characterized in that: The power amplifier circuit includes an operational amplifier U7, an operational amplifier U2A, an operational amplifier U2B, a player LS1, a capacitor C12 and a capacitor C14. The operational amplifier U7 is respectively connected to the tuning chip U6 and the capacitor C12, the operational amplifier U2A is respectively connected to the capacitor C12 and the operational amplifier U2B, and the capacitor C14 is respectively connected to the operational amplifier U2B and the player LS1.

6. The DSP tuning system for vehicle audio according to claim 2, characterized in that: The power management circuit includes a power interface J1, a power switch SW1, a power management chip U3, a capacitor C6 and a capacitor C7. The power management chip U3 is connected to the digital signal controller U1, the capacitor C6, the capacitor C7 and the power switch SW1 respectively. The power switch SW1 is connected to the power interface J1.

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