Earphone output impedance adaptive system and method
An adaptive system, output impedance technology, applied in earphone/headphone accessories, headphone mechanical/electronic switches, transducer circuits, etc., can solve problems such as hindering the versatility and maintainability of equipment, and improve the overall conversion efficiency, dynamic Volume adaptive effect
Pending Publication Date: 2021-11-02
AVIC HUADONG OPTOELECTRONICS (SHANGHAI) CO LTD
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[0003] At present, the general impedance of earphones on the market is 32Ω, which is suitable for most electronic devices, but there are still some electronic devices with large-span impedance ranges such as 150Ω, 300Ω, 600Ω and 20000Ω. Generally, customized earphone matching is used for this type of electronic equipment. To a certain extent, it hinders the versatility and maintainability of the equipment
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[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0032] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the number of indicated technical features . Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the present invention, unles...
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The invention discloses an earphone output impedance adaptive system, which comprises an operation processing unit used for collecting input and output audio amplitudes and calculating corresponding impedance according to the input and output audio amplitudes; a first impedance adjusting unit connected with audio playing equipment and the operation processing unit and used for adjusting impedance according to a corresponding calculation result of the operation processing unit; a second impedance adjusting unit connected with an earphone and the operation processing unit and used for adjusting impedance according to a corresponding calculation result of the operation processing unit; an audio adjusting unit connected with the operation processing unit, the first impedance adjusting unit and the second impedance adjusting unit, and used for adjusting an output audio signal according to the volume adjusting signal of the operation processing unit; and a power supply unit connected with the operation processing unit and the audio adjusting unit and used for supplying power. According to the invention, the overall conversion efficiency on an audio signal channel is improved, so that the best earphone output effect is obtained, and dynamic volume adaption is completed.
Description
technical field [0001] The invention relates to the technical field of earphones, in particular to an earphone output impedance adaptive system and method. Background technique [0002] Earphones are used to connect with audio playback equipment to receive audio with you. In the case of constant device power, the actual output power of the earphone is mainly determined by the earphone impedance (external resistance) and the internal resistance of the device. According to theoretical calculations, when the external resistance is equal to the internal resistance, the earphone can obtain the maximum output power. [0003] At present, the general impedance of earphones on the market is 32Ω, which is suitable for most electronic devices, but there are still some electronic devices with large-span impedance ranges such as 150Ω, 300Ω, 600Ω and 20000Ω. Generally, customized earphone matching is used for this type of electronic equipment. To a certain extent, it hinders the versatil...
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IPC IPC(8): H04R1/10H04R3/00
CPCH04R1/1041H04R3/007
Inventor 曹振雷马翼平许召辉王阳
Owner AVIC HUADONG OPTOELECTRONICS (SHANGHAI) CO LTD