Broadband analog signal isolation circuit and method based on electric field coupling, and oscilloscope

An analog signal and electric field coupling technology, applied in the direction of voltage/current isolation, instrumentation, measurement of electrical variables, etc., can solve the problems of increasing volume, increasing signal noise, affecting signal quality, etc., achieving reduced power consumption, simple devices, The effect of reducing the size of the circuit

Inactive Publication Date: 2020-01-14
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At this time, the signal will be divided into multiple transmissions, which not only greatly increases the volume, but also increases the signal noise and affects the signal quality.

Method used

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  • Broadband analog signal isolation circuit and method based on electric field coupling, and oscilloscope
  • Broadband analog signal isolation circuit and method based on electric field coupling, and oscilloscope
  • Broadband analog signal isolation circuit and method based on electric field coupling, and oscilloscope

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Embodiment Construction

[0023] The present disclosure will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0025] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinati...

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Abstract

The invention mainly discloses a broadband analog signal isolation circuit and method based on electric field coupling, and the circuit comprises three parts of a differential driver at an isolated end, a signal isolation portion based on an electric field coupling method, and an impedance converter at a non-isolated end, wherein the signal isolation portion comprises two isolation capacitors, andisolation of the analog signal is achieved by charging and discharging the isolation capacitors. The invention can not only ensure the amplitude-frequency characteristic response of the low-band analog signal isolation, but also greatly expand the isolation of the high-band analog signal. In theory, there is no limit on the frequency of the isolated signal, and the power consumption is significantly reduced, which makes the isolation channel volume of the oscilloscope further reduced.

Description

technical field [0001] The invention relates to the technical field of test and measurement, in particular to a broadband analog signal isolation circuit and method based on electric field coupling. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Oscilloscope is an electronic measuring instrument with a wide range of uses. It can convert invisible electrical signals into visible images, which is convenient for people to study the changing process of various electrical phenomena; but in its actual application, it usually has Strong interference sources, and analog signals such as electrical signals, especially low-frequency analog signals, are very susceptible to interference from other interference signals such as electromagnetic signals, high-frequency digital signals, etc., resulting in the superposition of useless signals during the tr...

Claims

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Application Information

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IPC IPC(8): G01R15/16G01R13/00
CPCG01R13/00G01R15/16
Inventor 邵建波刘洪庆刘永王啸李云彬
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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