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Headphone amplifier circuit for earphone unit and operation method thereof, and earphone device using same with USB interface

A headphone amplifier and headphone technology, which is applied in the direction of headphone mechanical/electronic switch, transducer circuit, earpiece/headphone accessories, etc., can solve the problems affecting the quality of listening, solve the crosstalk interference between the left and right channels, and increase the separation degree, solve the effect of insufficient output signal amplitude and radiation interference

Active Publication Date: 2018-07-06
REALTEK SEMICON CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, if figure 1 As shown, since the left-ear earphone 14_L and the right-ear earphone 14_R share the same reference ground point (reference ground), when the integrated circuit 10 outputs the right-ear audio signal through the contact HPO_R, part of the right-ear audio signal will be coupled to The connection between the contact GND and the contact GND_ref, these coupled signals will be transmitted to the left earphone 14_L, and the user will hear the audio signal of the right ear through the left earphone 14_L, thus affecting the listening quality

Method used

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  • Headphone amplifier circuit for earphone unit and operation method thereof, and earphone device using same with USB interface
  • Headphone amplifier circuit for earphone unit and operation method thereof, and earphone device using same with USB interface
  • Headphone amplifier circuit for earphone unit and operation method thereof, and earphone device using same with USB interface

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Embodiment Construction

[0041] Hereinafter, the present invention will be described in detail by illustrating various embodiments of the invention by way of drawings. However, inventive concepts may be embodied in many different forms and should not be construed as limited to the illustrative embodiments set forth herein. Additionally, the same reference numbers may be used to denote similar components in the drawings.

[0042] First, see figure 2 , figure 2 It is a schematic circuit diagram of a headphone amplifier circuit for a headphone unit provided by an embodiment of the present invention. The headphone amplifier circuit 22 mainly includes an audio processing circuit 220 and at least one phase adjuster 222 . Wherein, each of the above-mentioned components may be realized through a pure hardware circuit, or through a hardware circuit combined with firmware or software. In a word, the present invention does not limit the specific implementation of the headphone amplifier circuit 22 . In ad...

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Abstract

The embodiments of the invention provide a headphone amplifier circuit for a headphone unit and an operation method thereof, and an earphone device using the same with a USB interface. The output stage of the headphone amplifier circuit is improved to a differential output structure to effectively solve the problem of crosstalk interference between left and right channels and then increase the separation of the left and right channels, so that the senses of space and distance contained in the audio content can be presented more specifically.

Description

technical field [0001] The present invention relates to a headphone amplifier circuit (headphone amplifier circuit) for a headphone speaker and an operation method thereof, and in particular to a method considering that the output stage of the improved headphone amplifier circuit is a differential output (differential output stage). output) structure, and a headphone device with a USB interface using the above-mentioned headphone amplifier circuit. Background technique [0002] For the current headphone unit, when the wiring of the headphone unit is coupled to the headphone amplifier circuit, the output stage of the headphone amplifier circuit itself adopts a single-ended (single-ended) output structure, thus making the headphone unit When the left and right channels of the body are playing sound, the right channel will slightly hear the sound of the left channel, and the left channel will also slightly hear the sound of the right channel. [0003] For example, see figure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/10H04R3/00
CPCH04R1/1041H04R3/00H04R2420/03
Inventor 庄宗朋李少勋张政斌
Owner REALTEK SEMICON CORP
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