Integrated audio signal player
An audio signal, integrated technology, applied in the direction of sensors, transducer circuits, sensor components, etc., can solve the problems of occupying system area, signal transmission gain loss, abnormal operation, etc., to achieve multi-gain controllable transmission, large Adaptable, consistent effect
Inactive Publication Date: 2017-05-24
WILL SEMICON (SHANGHAI) CO LTD
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Problems solved by technology
[0010] The purpose of the present invention is to solve the problem of backfeeding current in the traditional two-in-one audio signal player of earpiece and loudspeaker, which causes device breakdown, deformation and distortion of output waveform, extremely deteriorates the quality of audio signal, and makes the whole system work abnormally. , and occupies the system area, leading to technical problems of signal transmission gain loss, poor stability and poor consistency
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[0035] The present invention will now be described in further detail with reference to the drawings and embodiments. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner. Therefore, they only show the structures related to the present invention, and they should not be construed as limiting the present invention.
[0036] Such as Image 6 As shown, the integrated audio signal player of the embodiment of the present invention includes an audio processor, an audio controller, and a speaker; wherein the audio controller includes an audio power amplifier, an operational amplifier component, a highest level selector and a level converter, The audio power amplifier is used to amplify the audio signal in the speaker mode, the operational amplifier component is used to amplify the audio signal in the earpiece mode, and the output terminals of the audio power amplifier and the operational amplifier are...
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The invention discloses an integrated audio signal player comprising an audio processor, an audio power amplifier, an operational amplifier component, a highest level selector and a level converter. The output end of the audio power amplifier and the operational amplifier is connected with a loudspeaker. The audio processor outputs two sets of audio signals, wherein the first audio signal is a receiver mode audio signal, and the second audio signal is a loudspeaker mode audio signal. The audio processor is provided with two I / O ports, wherein the first port is connected with the control end of the operational amplifier component and used for controlling on / off of the operational amplifier component, and the second port is connected with the control end of the audio power amplifier and used for controlling on / off of the audio power amplifier. The gain-adjustable operational amplifier component is applied to replace a straight-through analog switch so that multi-gain controllable transmission of the audio signals can be realized, occupation of the system space can be greatly reduced, and the consistency, the stability and the reliability are better.
Description
Technical field [0001] The invention relates to an integrated audio signal player, which is used in the field of intelligent terminals represented by smart phones. Background technique [0002] With the rapid development of smartphones, the competition among various mobile phone manufacturers has become increasingly fierce. In order to make products more competitive, how to effectively use the space of mobile phones to a greater extent, and how to reduce product costs more effectively under the premise of ensuring quality are the constant pursuit of various mobile phone design and development companies. [0003] Generally speaking, the handset and speaker of a mobile phone are two different access systems. figure 1 As shown, in the working process, the baseband controls the output of the earpiece through the earpiece output terminals EARP and EARN, and outputs to the external audio power amplifier Audio_PA through the audio output terminals Audio_P and Audio_N, and drives the speak...
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Inventor 尹辉
Owner WILL SEMICON (SHANGHAI) CO LTD