Acoustical product with audio output power adjustable within large range

A technology with high audio output and high power, which is applied in the direction of amplification control, frequency response correction, electrical components, etc. It can solve the problems of not being able to better meet the application needs of different consumers, not being able to directly drive speakers, and restrictions, so as to achieve expansion and application field, solving blindness, and meeting application requirements

Active Publication Date: 2015-03-25
QINGDAO GOERTEK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the audio power amplifier of this type of acoustic product can only drive the earphone or the low-power speaker installed on the machine to output audio signals, and cannot directly drive the ...

Method used

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  • Acoustical product with audio output power adjustable within large range
  • Acoustical product with audio output power adjustable within large range
  • Acoustical product with audio output power adjustable within large range

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Embodiment Construction

[0024] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] In order to be able to drive more types of loudspeakers to play audio signals, the acoustic product of this embodiment designs a set of audio circuits that can realize a wide range of adjustable output power on the internal circuit board of the acoustic product, see figure 1 Shown, including audio power amplifier circuit (such as audio power amplifier), controller and supply voltage regulation circuit. Among them, the audio power amplifier circuit receives the audio signal output by the audio source or the audio processing chip (for acoustic products with a built-in audio processing chip), and performs power amplification on the received audio signal according to the selected gain level and / or power supply voltage After processing, drive the local or external speaker to play the audio signal.

[0026] Since diffe...

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Abstract

The invention discloses an acoustical product with audio output power adjustable within a large range. The product is provided with a power supply voltage adjusting circuit, an audio power amplifying circuit, a current/voltage detection circuit and a controller. The current/voltage detection circuit detects current or voltage of an audio signal output through an audio power amplifier, generates a corresponding detection signal and outputs the signal to the controller; the controller judges whether the audio frequency signal output by the audio power amplifier is distorted or not according to the detected signal; if the audio frequency signal is distorted, the output power of the audio power amplifier is increased through the control mode of combining adjustment of gains of the audio power amplifier and adjustment of power supply voltage input to the audio power amplifier so as to drive a loudspeaker to send out sound normally. The output power of the audio power amplifier is comprehensively adjusted by adopting the two modes of gain adjustment and power supply voltage adjustment, and therefore the adjusting range of the audio output power is expanded, so that one type of acoustical product can drive loudspeakers of more types, and the different application requirements of the consuming public are met better.

Description

technical field [0001] The invention belongs to the technical field of acoustic products, and in particular relates to a circuit design capable of adjusting the audio power output by acoustic electronic products in a wide range. Background technique [0002] For the current acoustic electronic products with audio output function, especially miniaturized handheld acoustic products such as mobile phones, PDAs, Walkmans, etc., the gain of the audio power amplifier used inside is fixed, even if Some audio power amplifiers have a gain adjustment function, but their adjustable range is also very limited. Therefore, the audio power amplifier of this type of acoustic product can only drive the earphone or the low-power speaker installed on the machine to output audio signals, and cannot directly drive the external loudspeaker with higher power, which limits the use of this type of acoustic product. Applications for some special occasions cannot better meet the different applicatio...

Claims

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Application Information

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IPC IPC(8): H04R3/04H03G3/20
Inventor 李卫国宋国明
Owner QINGDAO GOERTEK
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