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Combined varistor and LC filter device

A technology of LC filter and combination device, applied in the direction of structure fixed capacitor combination, resistor, circuit device, etc., can solve problems such as interference of various components

Inactive Publication Date: 2006-04-19
SAMSUNG ELECTRO MECHANICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although EMI filters and varistors are generally used on the front end of most mobile communication devices, EMI filters and varistors are traditionally manufactured as the aforementioned separate discrete components and assembled in mobile communication devices, so the problem with conventional components is that: Separate assembly areas with possible interference between individual components

Method used

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  • Combined varistor and LC filter device
  • Combined varistor and LC filter device
  • Combined varistor and LC filter device

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Embodiment Construction

[0027] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description and drawings, descriptions of well-known functions and structures that deviate from the gist of the present invention or have little relation to the present invention are omitted, and the same reference numerals are used for components that perform the same functions.

[0028] figure 2 is a perspective view showing the external structure of a combination device of a varistor and an LC filter according to an embodiment of the present invention. image 3 is an exploded perspective view showing the internal structure of a varistor and LC filter combination device according to an embodiment of the present invention.

[0029] see figure 2 , the varistor and LC filter combination device 20 according to one embodiment of the present invention includes: a body 21 mainly composed of zinc oxide ZnO, wherein zinc oxide acts ...

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Abstract

Disclosed herein is a combined varistor and LC filter device in which both a varistor function of protecting circuits by absorbing surge voltage and an electromagnetic interference filter function of improving radiation characteristics are implemented in a single chip, thus having reduced mounting area. The combined device includes a body which acts as an insulator at voltages below a predetermined level, and the resistance of which decreases rapidly at voltages above a predetermined level. Inductance patterns constituting an LC resonant circuit, capacitance patterns and ground patterns are implemented in the body in a multilayer structure. The combined device operates as an LC filter at a low voltage and operates as a varistor at a high voltage.

Description

technical field [0001] The present invention generally relates to a combined device for mobile communication equipment, and in particular to a combined varistor and LC filter device (combined varistor and LC device, also referred to as a combined varistor and LC filter device), which has the ability to absorb The varistor function of the surge voltage protection circuit also has an EMI filter function that improves radiation characteristics by filtering signals different from those in the set band. Background technique [0002] Most mobile communication devices are equipped with varistors to protect circuits from overvoltage or static electricity inflow from the outside, and are also equipped with high-frequency electromagnetic interference (EMI) suppression filters. [0003] figure 1 A conventional circuit configuration of a varistor and an EMI suppression filter is shown. The varistor 11 is provided between the signal line IN-OUT through which the signal is transmitted a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H5/00H03H5/12H01C7/12H01C13/02H01G4/40H01PH02H9/00
CPCH01G4/40H01C7/12H02H9/005H01C13/02H01P1/203H02H9/043H03H7/075H01L27/0248H02H9/041
Inventor 安进模申成湜朴光秀
Owner SAMSUNG ELECTRO MECHANICS CO LTD