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A portable headphone amplifier

A headphone amplifier and portable technology, which is applied in earpiece/headphone accessories, sensors, microphones, etc., can solve the problems of large size and high cost of headphone amplifiers, and achieve the effect of compressing the size and required volume

Active Publication Date: 2021-11-02
XIAN AERONAUTICAL POLYTECHNIC INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a portable headphone amplifier, which solves the problems of high cost, large volume and difficult portability of existing headphone amplifiers.

Method used

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  • A portable headphone amplifier
  • A portable headphone amplifier
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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0032] A portable earphone amplifier provided by the present invention includes a charging module, a positive and negative boosting module, a voltage stabilizing module, a filament power supply module, a 35V boosting circuit module, an output protection circuit module and an amplifying circuit module, wherein:

[0033] The charging module is used for connecting with an external power supply device and storing electric energy, specifically: the charging module is connected with an external device through a USB interface; It is connected with an external power supply; the charging module is connected with the positive and negative boost modules for providing power to the positive and negative boost modules.

[0034] The positive and negative step-up module is used to output a voltage of plus or minus 15V and a current of plus or minus 1.5A to provide voltage fo...

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Abstract

A portable earphone amplifier provided by the present invention includes a charging module, a positive and negative boost module, a filament power supply module, a 35V boost circuit module and an amplifying circuit module, wherein the charging module is respectively powered by the positive and negative boost modules and the filament The module is connected with the 35V boost circuit module, which is used to provide power to the positive and negative boost modules and the filament power supply module; The operation provides voltage; the filament power supply module is connected to the filament of the electronic tube; the amplifying circuit module adopts the dual amplifier circuit of the electronic tube pre-stage buffer tuning circuit and the post-stage integrated op-amp amplifier circuit for secondary coupling; among them, the electronic tube pre-stage buffer tuning circuit The audio circuit is an electronic tube signal amplifying circuit; the post-stage integrated operational amplifier amplifying circuit is an amp signal amplifying circuit; this structure greatly reduces the size and required volume of the power supply circuit.

Description

technical field [0001] The invention belongs to the field of electronic products, and in particular relates to a portable earphone amplifier. Background technique [0002] Market research shows that the capacity of the domestic amp market is close to 20 billion yuan a year, the high-end market is monopolized by European and American brands, and the low-end market is mixed. Among them, most of the ear amplifiers have these problems: too large size, weak battery, excessive sound dyeing, too short distance between the Bluetooth headset and the mobile phone, and so on. [0003] (1) Due to the short life of the electronic tube and the high manufacturing cost, the cost has increased sharply. The price of high-end amps is tens of thousands of yuan, and the average price of general amps is also around 2000-3000 yuan. [0004] (2) The active device in the transistor amp (stone machine) line is composed of transistors, with low output impedance, strong control ability, less sound col...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R1/10H04R3/00
CPCH04R1/1091H04R3/00H04R2201/10
Inventor 程桐杨王瑜瑜
Owner XIAN AERONAUTICAL POLYTECHNIC INST
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