Digital power amplifier circuit with adjustable DSP (Digital Signal Processor)

By using a digital amplifier chip in the audio amplifier circuit and being controlled by the Bluetooth audio processor and can perform DSP adjustment design, the high cost and high failure rate caused by the two-part design of the audio amplifier circuit and the DSP circuit in the prior art is solved, and the effect of simple circuit, low cost and easy debugging is achieved.

CN222839652UActive Publication Date: 2025-05-06FIRST AUDIO MFG CO LTD
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Patent Information

Application Number
CN202421362472.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-14
Publication Date
2025-05-06
Estimated Expiration
2034-06-14

AI Technical Summary

Technical Problem

The existing audio amplifier circuit and DSP circuit are designed in two parts, resulting in high costs, large design workload, possible noise, reduced signal-to-noise ratio, increased PCB board, and increased failure rate.

Method used

It adopts a DSP adjustable digital amplifier circuit, which is controlled by the Bluetooth audio processor U2 through the digital amplifier chip U1, and can be connected to the computer USB for DSP adjustment. After the tune is completed, it is written into the Bluetooth audio processor U2, so that the amplifier can output sound according to the settings. Adopt an integrated digital integrated IC circuit design.

Benefits of technology

It realizes simple circuit, low cost, easy wiring, easy debugging, fewer faults, and improves the reliability of the entire machine.

✦ Generated by Eureka AI based on patent content.

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    Figure CN222839652U_ABST
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Abstract

A digital power amplifier circuit with an adjustable DSP comprises a digital power amplifier chip U1 and a Bluetooth audio processor U2, the 27th pin and the 28th pin of the digital power amplifier chip U1 are combined and then connected with a power supply PVDD, the 15th pin and the 16th pin of the digital power amplifier chip U1 are combined and then connected with the power supply PVDD, and the 6th pin, the 7th pin and the 8th pin of the digital power amplifier chip U1 are connected with the 19th pin, the 20th pin and the 21th pin of the Bluetooth audio processor U2 respectively for digital audio transmission. And a tenth pin and an eleventh pin of the digital power amplifier chip U1 are respectively connected with a sixth pin and a seventh pin of the Bluetooth audio processor U2, so that the digital power amplifier chip U1 is controlled by the Bluetooth audio processor U2. The integrated digital IC circuit design is adopted, the cost is low, the circuit is simple, wiring and debugging are easy, faults are few, and the reliability of the whole machine is improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of audio, in particular to a DSP adjustable digital power amplifier circuit. Background Art

[0002] At present, many audio amplifier circuits and DSP circuits are designed in two parts, and the two parts are powered separately, including ground loops, debugging, etc. The design of the amplifier circuit and DSP circuit in two parts is costly and increases the design workload; it may generate noise and reduce the signal-to-noise ratio of the whole machine; the PCB board will increase and the failure rate will increase. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a DSP adjustable digital power amplifier circuit, which has the advantages of simple circuit, low cost, easy wiring and easy debugging.

[0004] To solve the above technical problems, the technical solution of the utility model is: a DSP adjustable digital power amplifier circuit, a digital power amplifier chip U1 and a Bluetooth audio processor U2, the model of the digital power amplifier chip U1 is ACM8625S, and the model of the Bluetooth audio processor U2 is BP1048B2; the 27th and 28th pins of the digital power amplifier chip U1 are combined and connected to the power supply PVDD, the 15th and 16th pins of the digital power amplifier chip U1 are combined and connected to the power supply PVDD, the 6th, 7th and 8th pins of the digital power amplifier chip U1 are respectively connected to the 19th, 20th and 21st pins of the Bluetooth audio processor U2 for digital audio transmission, and the 10th and 11th pins of the digital power amplifier chip U1 are respectively connected to the 6th and 7th pins of the Bluetooth audio processor U2 so that the digital power amplifier chip U1 is controlled by the Bluetooth audio processor U2. The principle of the utility model: the digital power amplifier chip U1 is controlled by the Bluetooth audio processor U2 and can be connected to the computer USB for DSP adjustment. After the tuning is completed, it is burned into the Bluetooth audio processor U2, so that the power amplifier outputs the sound according to the setting; it adopts an integrated digital integrated IC circuit design, which has low cost, simple circuit, easy wiring, easy debugging, few faults, and improves the reliability of the whole machine.

[0005] As an improvement, the 10th and 11th pins of the digital power amplifier chip U1 are connected to the 6th and 7th pins of the Bluetooth audio processor U2 via a debugging interface.

[0006] Compared with the prior art, the utility model has the following beneficial effects:

[0007] The digital power amplifier chip U1 is controlled by the Bluetooth audio processor U2 and can be connected to the computer USB for DSP adjustment. After the tuning is completed, it is burned into the Bluetooth audio processor U2, so that the power amplifier can output sound according to the settings. It adopts an integrated digital integrated IC circuit design with low cost, simple circuit, easy wiring, easy debugging, few faults, and improved reliability of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is the pin diagram of the digital power amplifier chip U1.

[0009] Figure 2 This is the pin diagram of the Bluetooth audio processor U2. DETAILED DESCRIPTION

[0010] The utility model will be further described below in conjunction with the accompanying drawings.

[0011] A DSP adjustable digital power amplifier circuit, a digital power amplifier chip U1 and a Bluetooth audio processor U2, wherein the model of the digital power amplifier chip U1 is ACM8625S, and the model of the Bluetooth audio processor U2 is BP1048B2; the 27th and 28th pins of the digital power amplifier chip U1 are combined and connected to a power supply PVDD, the 15th and 16th pins of the digital power amplifier chip U1 are combined and connected to a power supply PVDD, the 6th, 7th and 8th pins of the digital power amplifier chip U1 are respectively connected to the 19th, 20th and 21st pins of the Bluetooth audio processor U2 for digital audio transmission, the 10th and 11th pins of the digital power amplifier chip U1 are respectively connected to the 6th and 7th pins of the Bluetooth audio processor U2 so that the digital power amplifier chip U1 is controlled by the Bluetooth audio processor U2, and the digital power amplifier chip U1 is controlled by the Bluetooth audio processor U2. The 10th and 11th pins of the digital power amplifier chip U1 are connected to the 6th and 7th pins of the Bluetooth audio processor U2 through the debugging interface; the 27th and 28th pins of the digital power amplifier chip U1 are combined and connected to the capacitors C47, C48, and C51 connected in parallel to the ground, the 15th and 16th pins of the digital power amplifier chip U1 are combined and connected to the capacitors C86, C87, and C84 connected in parallel to the ground, the 25th and 26th pins of the digital power amplifier chip U1 are combined and connected to the positive electrode of the speaker SP1, the 22nd and 23rd pins of the digital power amplifier chip U1 are combined and connected to the negative electrode of the speaker SP1, the 20th and 21st pins of the digital power amplifier chip U1 are combined and connected to the negative electrode of the speaker SP2, and the 17th and 18th pins of the digital power amplifier chip U1 are combined and connected to the positive electrode of the speaker SP2.

[0012] The principle of the utility model: the digital power amplifier chip U1 is controlled by the Bluetooth audio processor U2 and can be connected to the computer USB for DSP adjustment. After the tuning is completed, it is burned into the Bluetooth audio processor U2, so that the power amplifier outputs the sound according to the setting; it adopts an integrated digital integrated IC circuit design, which has low cost, simple circuit, easy wiring, easy debugging, few faults, and improves the reliability of the whole machine.

Claims

1. A DSP adjustable digital power amplifier circuit, characterized in that: A digital power amplifier chip U1 and a Bluetooth audio processor U2, wherein the model of the digital power amplifier chip U1 is ACM8625S, and the model of the Bluetooth audio processor U2 is BP1048B2; the 27th and 28th pins of the digital power amplifier chip U1 are combined and connected to the power supply PVDD, the 15th and 16th pins of the digital power amplifier chip U1 are combined and connected to the power supply PVDD, the 6th, 7th and 8th pins of the digital power amplifier chip U1 are respectively connected to the 19th, 20th and 21st pins of the Bluetooth audio processor U2 for digital audio transmission, and the 10th and 11th pins of the digital power amplifier chip U1 are respectively connected to the 6th and 7th pins of the Bluetooth audio processor U2 so that the digital power amplifier chip U1 is controlled by the Bluetooth audio processor U2.

2. A DSP adjustable digital power amplifier circuit according to claim 1, characterized in that: The 10th and 11th pins of the digital power amplifier chip U1 are connected to the 6th and 7th pins of the Bluetooth audio processor U2 via a debugging interface.