Audio modulation method

An audio modulation and audio technology, applied in audio amplifiers, adjusting electrical variables, control/regulating systems, etc., can solve the problem of high power consumption of audio amplifiers, reduce harmonic distortion, reduce dynamic power consumption, and reduce power consumption Effect

Pending Publication Date: 2020-10-02
上海艾为集成电路技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the application provides an audio modulation method to solve the problem of large power consumption of existing audio amplifiers

Method used

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Embodiment Construction

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application. In the case of no conflict, the following embodiments and technical features thereof can be combined with each other.

[0043] Please refer to Figure 1a , is a schematic structural diagram of an audio modulation circuit according to an embodiment of the present invention.

[0044] In this embodiment, the audio modulation circuit is used to process a pair of differential signals, and the pair of differential signals are respectively coupled to the input terminals of the amplifier Amp1 for full differential ...

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Abstract

The invention discloses an audio modulation method, which comprises the steps of performing operational amplification on an audio differential signal, and outputting a first amplified signal and a second amplified signal, the first amplified signal and the second amplified signal being a pair of differential signals of which the level values are symmetrical about a common-mode reference voltage; and dynamically adjusting the common-mode reference voltage according to the first amplification signal and the second amplification signal. The audio modulation method can reduce power consumption.

Description

technical field [0001] The present application relates to the technical field of signal modulation, in particular to an audio modulation method. Background technique [0002] A Class D audio amplifier is a commonly used high-efficiency amplifier for amplifying audio signals. In a system using a Class D amplifier, an analog input signal is converted into a series of pulse-modulated signals with different pulse widths to drive audio speakers. [0003] The existing class D audio amplifier usually has two output terminals, which are respectively connected to the positive and negative poles of the load, and the connection between the output terminal and the positive and negative poles of the load is usually connected to an LC filter structure or a switch control circuit. Whether it is static or dynamic working state, the output signal will cause a large power consumption in the LC filter structure or switch control circuit. [0004] As portable devices such as smart phones are u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/217H03F3/68G05F1/56
CPCG05F1/56H03F3/217H03F3/68H03F2200/03
Inventor 薛蓉
Owner 上海艾为集成电路技术有限公司
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