Anti-ground loop noise circuit, system and unbalanced audio equipment

A technology for audio equipment and ground loops, applied in the circuit field, can solve the problems that audio isolators are not suitable for unbalanced audio equipment and reduce the quality of audio signals, and achieve the effects of suppressing noise, improving stability, and simplifying design

Active Publication Date: 2021-07-16
HANGZHOU HIKVISION DIGITAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the above method, the audio isolator is not suitable for all unbalanced audio equipment, and the use of the audio isolator will reduce the quality of the audio signal, and disconnecting the ground wire of the equipment will cause safety risks

Method used

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  • Anti-ground loop noise circuit, system and unbalanced audio equipment
  • Anti-ground loop noise circuit, system and unbalanced audio equipment
  • Anti-ground loop noise circuit, system and unbalanced audio equipment

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Embodiment Construction

[0030] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

[0031] The terms "comprising" and "having" and any variations thereof in the description and claims of the present application and the drawings are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or...

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Abstract

The embodiment of the invention provides an anti-grounding loop noise circuit, an anti-grounding loop noise system and unbalanced audio equipment, which are applied to the unbalanced audio equipment and comprise a differential amplification circuit, the positive input end of the differential amplification circuit is connected with the signal end in an audio interface, the negative input end of the differential amplification circuit is connected with the grounding end in the audio interface, and the negative input end of the differential amplification circuit is connected with the signal end in the audio interface. The audio interface is an input interface of the audio equipment, and the differential amplification circuit is used for amplifying a differential audio signal sent by source end audio equipment and inhibiting ground loop noise. According to the embodiment of the invention, ground isolation between the two audio devices is realized from the perspective of hardware design, and balance and non-balance output ports of the audio device at the source end are compatible, so that additional adaptation is not needed. By adopting the technical scheme, the design of field wiring is greatly simplified, and the audio signal quality and the stability of an audio system are improved.

Description

technical field [0001] The present application relates to the field of circuit technology, in particular to an anti-ground loop noise circuit, system and unbalanced audio equipment. Background technique [0002] In the current audio system, ground loop noise is common. Ground loop noise refers to the current noise generated on the connecting line of the two devices due to the difference in ground impedance between the two devices, resulting in a potential difference between the two devices. , affecting the transmission of audio signals. [0003] For an unbalanced audio system, the existing technology provides two methods of anti-ground loop noise, one is to use an audio isolator to isolate the ground of the source device and the receiver device; Open the ground wires of the rest of the equipment. [0004] However, in the above methods, the audio isolator is not suitable for all unbalanced audio equipment, and the use of the audio isolator will reduce the quality of the aud...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/02
CPCH04R3/02
Inventor 叶坚坚
Owner HANGZHOU HIKVISION DIGITAL TECH
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