Audio voltage following circuit, audio product and voltage following method

Abstract

The invention discloses an audio voltage following circuit, an audio product and a voltage following method. The audio voltage following circuit comprises an audio digital processing module, a boosting module and a power amplification module, and the audio digital processing module is used for calculating an audio peak value according to an input audio data signal and generating a voltage control signal and an audio signal according to the audio peak value; the boosting module is connected with the audio digital processing module; the boosting module is used for generating a following voltage signal according to the voltage control signal; the power amplification module is connected with the audio digital processing module and the boosting module; and the power amplification module is used for amplifying the power of the audio signal according to the following voltage signal. According to the technical scheme provided by the invention, the hardware cost is reduced, the audio voltage changes along with the audio data signal, the static loss is reduced, and the power supply efficiency of the power amplifier is improved.

Description

technical field [0001] Embodiments of the present invention relate to power amplification technology, and in particular to an audio voltage follower circuit, an audio product and a voltage follower method. Background technique [0002] At present, portable audio products tend to be miniaturized, high-powered, and powered by batteries. On the premise of compressing the volume and capacity of the battery, it is necessary to ensure the battery life of the product, which has high requirements on the overall efficiency of the product. Currently, the audio power amplification part consumes the most energy in the audio system. [0003] At present, the detection circuit is usually used in products to perform power amplification after detecting the input signal, which undoubtedly increases the hardware cost of the detection circuit and increases the power loss. In addition, when a Class D or Class E power amplifier is used to meet the maximum power demand, the power supply voltage ...

AI Technical Summary

Problems solved by technology

[0003] At present, the detection circuit is usually used in the current product to detect the input signal and then perform power amplification, which undoubtedly increases the hardware cost of the detection circuit and increases the power loss.

And when using Class D or Class E power amplifiers to meet the maximum power demand, the power supply voltage of the power amplifier is fixed, which will cause a large static loss problem and reduce the power supply efficiency of the power amplifier

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