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Zero cross detection circuit

A zero-crossing detection circuit and zero-crossing technology, applied in the direction of measuring electrical variables, measuring current/voltage, measuring devices, etc., can solve the problems of reducing circuit service life and large circuit power consumption, and achieve low energy consumption and high efficiency. Effect

Pending Publication Date: 2022-03-29
HANGZHOU LIANXINTONG SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to ensure the accuracy of zero-crossing detection, the current zero-crossing detection circuit on the market consumes a lot of power. Long-term operation will greatly reduce the service life of the circuit, and will also limit the number of communication devices that can be networked to a certain extent.

Method used

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Embodiment Construction

[0038] In the description of the present application, the terms "first", "second" and the like are only used for distinguishing descriptions, and do not represent sequence numbers, nor can they be understood as indicating or implying relative importance.

[0039] In the description of the present application, the terms "comprising", "comprising", etc. indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude one or more other features, steps, operations, The presence or addition of elements, components and / or collections thereof.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

[0041] The techn...

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PUM

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Abstract

The invention discloses a zero-crossing detection circuit, and the circuit comprises a zero-crossing judgment circuit which is used for detecting a zero-crossing signal; and the energy storage capacitor is connected in parallel with the zero-crossing judgment circuit and is used for providing excitation current for the zero-crossing judgment circuit. The energy storage capacitor with a small capacitance value is adopted to provide excitation current for the zero-crossing judgment circuit, so that correct zero-crossing detection signals are rapidly provided, the efficiency is high, and the energy consumption is small.

Description

technical field [0001] The present application relates to the technical field of electronic circuits, in particular to a zero-crossing detection circuit. Background technique [0002] Zero-crossing detection refers to the detection made by the system when the waveform transitions from the positive half cycle to the negative half cycle and passes through the zero position in the AC system. Contemporary power carrier communication systems are based on the synchronization of carrier data transmission, and have high requirements for the accuracy of zero-crossing detection of AC voltage. [0003] In order to ensure the accuracy of zero-crossing detection, the current zero-crossing detection circuit on the market consumes a lot of power. Long-term operation will greatly reduce the service life of the circuit, and will also limit the number of communication devices that can be networked to a certain extent. . Contents of the invention [0004] The purpose of the present applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/175
CPCG01R19/175
Inventor 李信贤邱俪瑜
Owner HANGZHOU LIANXINTONG SEMICON CO LTD