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Ground loop noise immunity circuits, systems and unbalanced audio equipment

A technology of audio equipment and ground loop, which is applied in the field of circuits, 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: 2022-08-05
HANGZHOU HIKVISION DIGITAL TECH
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  • Summary
  • 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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  • Ground loop noise immunity circuits, systems and unbalanced audio equipment
  • Ground loop noise immunity circuits, systems and unbalanced audio equipment
  • Ground loop noise immunity circuits, systems and unbalanced audio equipment

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Embodiment Construction

[0030] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this application. Rather, they are merely examples of apparatus and methods consistent with some 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 this application and said drawings are intended to cover non-exclusive inclusions. 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 optionally al...

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Abstract

The anti-ground loop noise circuit, system, and unbalanced audio equipment provided by the embodiments of the present application are applied to unbalanced audio equipment, and include: a differential amplifier circuit, a positive input terminal of the differential amplifier circuit is connected to a signal terminal in an audio interface, The negative input terminal of the differential amplifier circuit is connected to the ground terminal in the audio interface, the audio interface is the input interface of the audio device, and the differential amplifier circuit is used to amplify the differential audio signal sent by the source audio device , and suppresses ground loop noise. In the embodiment of the present application, the ground isolation between the two audio devices is realized from the perspective of hardware design, and is compatible with the balanced and unbalanced output ports of the source audio device without additional adaptation. The adoption of the technical solution greatly simplifies the design of the field wiring, and improves the audio signal quality and the stability of the audio system.

Description

technical field [0001] The present application relates to the field of circuit technology, and 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 connection line between the two devices due to the difference in the ground impedance of the two devices, resulting in a potential difference between the two devices. , which affects 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; Disconnect the ground wire of the rest of the equipment. [0004] However, in the above method, the audio isolator is not suitable for all unbalanced audio devices, and the use of the audio isolator will reduce the qua...

Claims

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Application Information

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