Dynamic power-reducing circuit and electronic equipment

Abstract

The invention is applied to the technical field of electronics and provides a dynamic power-reducing circuit and electronic equipment. The dynamic power-reducing circuit comprises a detection circuit and a master control circuit, wherein the detection circuit is used for receiving a first audio signal, performing sampling and adjustment on the first audio signal and comparing the first audio signal subjected to sampling and adjustment with a reference signal to form a detection signal; and the master control circuit is used for starting power-reducing control or releasing power output according to the detection signal, and outputting a second audio signal. According to the invention, the first audio signal is subjected to sampling and adjustment and then compared with the reference signalto form the detection signal; power-reducing control or release of power output is performed according to the detection signal, and the second audio signal is output to an audio amplifying circuit, so the dynamic power reducing of audio output of electronic equipment can be realized, the excess of a design value is restrained, the design margin of the audio amplifying circuit, a sound box and a loudspeaker is greatly reduced, or even the design margin is reduced to zero, circuit design is simple, cost is quite low, and under the condition of no influence on sound quality and sound effect, thedesign cost is reduced and the sound box is protected.

Description

technical field [0001] The invention belongs to the field of electronic technology, in particular to a dynamic power reduction circuit and electronic equipment. Background technique [0002] Now in audio and video multimedia products such as TVs, home theaters, and power amplifiers: [0003] 1. The design of the dynamic power reduction circuit scheme is not used, and the speakers and speakers cannot be protected. At the same time, the design margin of the speakers and speakers is relatively large, and the cost is high; [0004] 2. Use ASIC to detect audio output and dynamically reduce power to protect speakers or speakers, but the design is cumbersome and the cost is high. Contents of the invention [0005] The purpose of the embodiments of the present invention is to provide a dynamic power reduction circuit, aiming at solving the problem that the existing dynamic power reduction circuit needs to use an application specific integrated circuit to detect the audio output, ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a dynamic power reduction circuit, which aims to solve the problem that the existing dynamic power reduction circuit needs to use an application-specific integrated circuit to detect audio output, and the design is complicated and the cost is high.

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