KR930003015Y1 - 3 port filter for preventing emi - Google Patents

3 port filter for preventing emi Download PDF

Info

Publication number
KR930003015Y1
KR930003015Y1 KR2019900018431U KR900018431U KR930003015Y1 KR 930003015 Y1 KR930003015 Y1 KR 930003015Y1 KR 2019900018431 U KR2019900018431 U KR 2019900018431U KR 900018431 U KR900018431 U KR 900018431U KR 930003015 Y1 KR930003015 Y1 KR 930003015Y1
Authority
KR
South Korea
Prior art keywords
filter
chip capacitor
terminal
emi
lead
Prior art date
Application number
KR2019900018431U
Other languages
Korean (ko)
Other versions
KR920010599U (en
Inventor
장병규
Original Assignee
삼성전기 주식회사
서주인
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성전기 주식회사, 서주인 filed Critical 삼성전기 주식회사
Priority to KR2019900018431U priority Critical patent/KR930003015Y1/en
Publication of KR920010599U publication Critical patent/KR920010599U/en
Application granted granted Critical
Publication of KR930003015Y1 publication Critical patent/KR930003015Y1/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/09—Filters comprising mutual inductance
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/05—Holders; Supports

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Filters And Equalizers (AREA)

Abstract

내용 없음.No content.

Description

EMI 방지용 3단자 필터EMI filter 3-terminal filter

제1도는 종래의 3단자 필터에 대한 구조도.1 is a structural diagram of a conventional three-terminal filter.

제2도는 본 고안 3단자 필터에 대한 구조도.2 is a structural diagram of a three-terminal filter of the present invention.

제3도는 3단자 필터의 등가회로도.3 is an equivalent circuit diagram of a three-terminal filter.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

14 : 리이드 15 : 칩 커패시터14: Lead 15: Chip Capacitor

16 : 상단전극 17 : 하단전극16: upper electrode 17: lower electrode

18,19 : 자기분말수지 20 : 외부도장 수지18,19: Magnetic powder resin 20: External coating resin

본 고안은 디지탈 기기에서 PCB 패턴이나 I/O 케이블 상의 신호에 포함된 고주파 노이즈 성분을 제거하기 위한 EMI 방지용 3단자 필터에 관한 것이다.The present invention relates to an EMI protection 3-terminal filter for removing high frequency noise components included in signals on PCB patterns or I / O cables in digital devices.

최근 디지탈 기기의 고속화에 따라 클릭신호 주파수의 증가로 인하여 발생되는 EMI(Electro Magnetic Interference : 전자파 장애)는 매우 심각한 문제로 대두되고 있다.Recently, due to the high speed of digital devices, EMI (Electro Magnetic Interference) caused by an increase in the click signal frequency has become a very serious problem.

통상 30MHz 이하인 주파수 신호는 도전선로를 따라 전파되지만 30MHz 이상의 주파수는 도전선로외에 공중을 타고 전파한다. 따라서 초고속 디지탈 기기의 I/O 케이블을 통하여 흐르는 신호는 주변 기기에 불요복사하게 되므로 주변기기에서의 오동작을 유발하게 된다.Frequency signals below 30MHz normally propagate along the conductive lines, but frequencies above 30MHz propagate in the air besides the conductive lines. Therefore, the signal flowing through the I / O cable of the ultra-high speed digital device is unnecessary to the peripheral device, causing a malfunction in the peripheral device.

이러한 문제점을 해결하기 위해 지금까지는 제1도에서 도시하고 있는 바와같은 3단자형 노이즈 필터를 이용하여 신호속에 포함된 노이즈를 제거하고 있었다.In order to solve this problem, noise included in a signal has been removed so far by using a three-terminal noise filter as shown in FIG.

종래의 3단자형 노이즈 필터는 칩커패시터(15)의 상단전극(16)을 ㄷ형 리이드의 중간 부위에 솔더링하고 상기 칩 커패시터(15)의 하단전극(17)에 리이드(12)를 납땜한후, 상기 칩커패시터(15)를 전부 자성분말수지(18)에 함침시켜 소성시킴으로써, 노이즈 방지용 3단자 페라이트 필터로 제작된다. 이에따라 칩 커패시터(15)에 의한 커패시턴스와 리이드(14)에 의한 인덕턴스 성분을 이용하여 제3도에 나타난 바와같은 등가회로의 필터가 구현된다.In the conventional three-terminal noise filter, the upper electrode 16 of the chip capacitor 15 is soldered to the middle portion of the c-shaped lead and the lead 12 is soldered to the lower electrode 17 of the chip capacitor 15. All the chip capacitors 15 are impregnated with the magnetic powder resin 18 and fired to produce a three-terminal ferrite filter for noise prevention. Accordingly, an equivalent circuit filter as shown in FIG. 3 is implemented by using the capacitance by the chip capacitor 15 and the inductance component by the lead 14.

그러나, 이와같은 종래의 필터에서는 자기 분말 수지(18)가 칩 커패시터(15)를 완전히 둘러쌓고 있기 때문에 칩 커패시터(15)의 상,하단 전극(16,17) 사이에 인덕턴스 성분이 노이즈 필터링에 악 영향을 미치고 있었다.However, in the conventional filter, since the magnetic powder resin 18 completely surrounds the chip capacitor 15, inductance components between the upper and lower electrodes 16 and 17 of the chip capacitor 15 are bad for noise filtering. It was affecting.

본 고안은 상기한 바와같이 기존의 필터에서 발생되는 불요 인덕턴스 성분을 제거하고 또한 칩 커패시터의 용량에 미치는 악 영향을 배제시킬 수 있는 EMI 방지용 3단자 필터를 제안한다.The present invention proposes a three-terminal filter for preventing EMI, which eliminates unnecessary inductance components generated in the existing filter as described above and also eliminates the adverse effect on the capacity of the chip capacitor.

이하 첨부된 도면을 참 고로하여 본 고안을 설명한다.Hereinafter, the present invention will be described with reference to the accompanying drawings.

제2도에서 도시하고 있는 바와같이 본 고안의 필터는 자기 분말수지(19)가 칩 커패시터(15)의 하단 전극(17)까지 함침되지 않게 하는데 특징으로 두고 있다.As shown in FIG. 2, the filter of the present invention is characterized in that the magnetic powder resin 19 is not impregnated to the lower electrode 17 of the chip capacitor 15.

이러한 필터를 제조하기 위해서는 먼저 ㄷ형 리이드(14)의 중간부분을 칩 커패시터(15)의 상단전극(16)에 납땜하고 칩 커패시터(15)의 하단전극(17)에는 리이드(12)를 납땜하여, 리이드(11,12,13)틀 가지는 3단자 필터의 반조립체를 완성한다.In order to manufacture such a filter, first, the middle portion of the c-type lead 14 is soldered to the upper electrode 16 of the chip capacitor 15, and the lead 12 is soldered to the lower electrode 17 of the chip capacitor 15. The lead (11, 12, 13) frame completes the semi-assembly of the three-terminal filter.

다음 이러한 반조립체 필터는 자기분말수지에 함침시켜 소성하게 되는데, 이때 자기분말수지(19)는 칩커패시터(15)의 하단전극(17)을 포함하지 않게 하여 소성시키게 된다.The semi-assembly filter is then impregnated with the magnetic powder resin and fired. In this case, the magnetic powder resin 19 is fired so as not to include the lower electrode 17 of the chip capacitor 15.

이후 리이드(11,12,13)를 제외한 전 필터 부분을 외부도장수지(20)로 도장하여 최종 3단자 필터를 완성한다.Thereafter, the entire filter part except the leads 11, 12, and 13 is coated with an external coating resin 20 to complete the final three-terminal filter.

이에따라 칩 커패시터(15)는 자기분말수지(19)로 된 페라이트의 영향을 받지 않고 순수한 고유의 커패시턴스를 유지하게 되므로, 기존의 필터에서 발생되었던 칩커패시터의 상하단전극과 자기 분말수지와의 관계에 의한 인덕턴스성분에 의해서 노이즈의 필터링 효과가 저하되는 현상을 방지 할수 있게 된다.Accordingly, since the chip capacitor 15 maintains pure inherent capacitance without being affected by the ferrite made of the magnetic powder resin 19, the chip capacitor 15 is formed by the relationship between the upper and lower electrodes of the chip capacitor and the magnetic powder resin. It is possible to prevent the phenomenon that the filtering effect of noise is degraded by the inductance component.

Claims (1)

EMI 방지용 3단자 노이즈 필터에 있어서, ㄷ형 리이드(14)와 칩커패시터(15)로 된 3단자 노이즈 필터의 반조립체의 상기 칩 커패시터(15)의 중간 부분까지 자기 분말 수지(19)가 성형소성되고, 상기 노이즈 필터의 3단자 리이드(11,12, 13)를 제외한 전 부분이 외부도장수지(20)로 도포된 것을 특징으로 하는 EMI 방지용 3단자 필터.In the three-terminal noise filter for preventing EMI, the magnetic powder resin (19) is molded and fired up to the middle portion of the chip capacitor (15) of the semi-assembly of the three-terminal noise filter consisting of the c-shaped lead (14) and the chip capacitor (15). EMI filter 3-terminal filter, characterized in that all parts except the three-terminal lead (11, 12, 13) of the noise filter is coated with an external coating resin (20).
KR2019900018431U 1990-11-28 1990-11-28 3 port filter for preventing emi KR930003015Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019900018431U KR930003015Y1 (en) 1990-11-28 1990-11-28 3 port filter for preventing emi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019900018431U KR930003015Y1 (en) 1990-11-28 1990-11-28 3 port filter for preventing emi

Publications (2)

Publication Number Publication Date
KR920010599U KR920010599U (en) 1992-06-17
KR930003015Y1 true KR930003015Y1 (en) 1993-05-27

Family

ID=19306032

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019900018431U KR930003015Y1 (en) 1990-11-28 1990-11-28 3 port filter for preventing emi

Country Status (1)

Country Link
KR (1) KR930003015Y1 (en)

Also Published As

Publication number Publication date
KR920010599U (en) 1992-06-17

Similar Documents

Publication Publication Date Title
CA2084496A1 (en) Emi internal shield apparatus and methods
US7382216B2 (en) Noise filter mounting structure
US4622527A (en) Isolation of RF signals in a RF shield aperture
CA2457252A1 (en) Ultra-high-frequency notch filter
US6016083A (en) Electronic circuit apparatus for suppressing electromagnetic radiation
KR930003015Y1 (en) 3 port filter for preventing emi
JPH08204377A (en) Shielding body
US4757282A (en) Line filter
US2835874A (en) Electrical interference suppression filter
KR930006839Y1 (en) Emi preventing filter for surface mounting
KR930006838Y1 (en) Cmi preventing filter for surface mounting
KR950001638Y1 (en) Surface mounting type emi filter
KR950001636Y1 (en) Chip type emi filter
JPH0353480Y2 (en)
JP3508329B2 (en) Chip type noise filter
KR960005182Y1 (en) Chip type emi filter
KR0136303B1 (en) Penetration type filter
KR0125416Y1 (en) 3 polar type emi protective filter
KR940000107Y1 (en) Network filter for emi
JPH03252193A (en) Wiring board
KR890000030B1 (en) Inductance coil of sild method
CN209563128U (en) A kind of electronic equipment having anti-interference function
KR200179113Y1 (en) 3-terminal filter for electromagnetic wave interference noise cancelling
KR0125415Y1 (en) Chip type emi protective filter
JPH01255254A (en) Packaging method for semiconductor integrated circuit

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 19961122

Year of fee payment: 5

LAPS Lapse due to unpaid annual fee