JPH0349209B2 - - Google Patents
Info
- Publication number
- JPH0349209B2 JPH0349209B2 JP57203019A JP20301982A JPH0349209B2 JP H0349209 B2 JPH0349209 B2 JP H0349209B2 JP 57203019 A JP57203019 A JP 57203019A JP 20301982 A JP20301982 A JP 20301982A JP H0349209 B2 JPH0349209 B2 JP H0349209B2
- Authority
- JP
- Japan
- Prior art keywords
- frequency characteristics
- ceramic filter
- present
- filter
- different frequency
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
- 239000000919 ceramic Substances 0.000 claims description 11
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 229910000679 solder Inorganic materials 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
- H03H9/542—Filters comprising resonators of piezoelectric or electrostrictive material including passive elements
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、異なる周波数特性のフイルタ機能を
単体部品として得られるようにしたセラミツクフ
イルタを提供するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a ceramic filter that can provide filter functions with different frequency characteristics as a single component.
従来例の構成とその問題点
従来のセラミツクフイルタは単体で１つの周波
数特性しか得られず、任意の周波数特性を重ねて
得ようとすれば、その得たいとする任意の周波数
特性分だけ配線上で接続しなければならず、回路
例としては第１図のようになり、第２図に示すよ
うな周波数1、2にピークをもつ周波数特性が得
られるが、回路的に周辺部品が多くなり、配線面
積も大きくなる欠点があつた。第１図で点線部分
で示す２つがセラミツクフイルタである。Conventional configuration and its problems Conventional ceramic filters can only obtain one frequency characteristic by themselves, and if you want to obtain arbitrary frequency characteristics by layering them, you will need to use the wiring for the desired frequency characteristics. An example circuit is shown in Figure 1, and a frequency characteristic with peaks at frequencies 1 and 2 as shown in Figure 2 can be obtained, but the circuit requires a large number of peripheral components. However, it also had the disadvantage of increasing the wiring area. The two shown by dotted lines in FIG. 1 are ceramic filters.
発明の目的
本発明は上記のような点に鑑みてなされたもの
で、異なる周波数特性のフイルタ機能を単体部品
で得ることができ、配線面積も小さくできるセラ
ミツクフイルタを提供しようとするものである。OBJECTS OF THE INVENTION The present invention has been made in view of the above-mentioned points, and it is an object of the present invention to provide a ceramic filter that can provide filter functions with different frequency characteristics with a single component and that can reduce the wiring area.
発明の構成
この目的を達成するために本発明のセラミツク
フイルタは、周波数特性の異なる複数個の圧電素
子を隙間を設けて電気的に接続するように重ね、
これを外部入出力リードが電気的に接続されたプ
リント配線基板上に複数個電気的に接続し、樹脂
等で外装してなるものであり、この構成によれば
単体部品でもつて異なる周波数特性のフイルタ機
能が得られることとなる。Structure of the Invention In order to achieve this object, the ceramic filter of the present invention includes a plurality of piezoelectric elements having different frequency characteristics stacked so as to be electrically connected with a gap therebetween.
A plurality of these are electrically connected to a printed wiring board to which external input/output leads are electrically connected, and the exterior is covered with resin, etc. With this configuration, even a single component can have different frequency characteristics. This provides a filter function.
実施例の説明
以下、本発明の一実施例について第３図ａ，ｂ
および第４図と共に説明する。まず、第３図ａ，
ｂに示すように外部入出力リード１が電気的に接
続され一体となつたプリント配線基板２上に１つ
の周波数特性を得るための圧電素子３をはんだま
たは導電性接着剤４で電気的・機械的に接続固定
し、さらにその圧電素子３の上に重ねてもう１つ
の周波数特性を得る圧電素子５を上記はんだまた
は導電性接着剤４で電気的・機械的に接続固定し
ている。この時、重ねた圧電素子３，５の間は上
記はんだまたは導電性接着剤４の厚みだけ隙間が
あるために、互いに干渉することなく振動でき
る。そして、上記圧電素子３，５に弾性材料やキ
ヤツプ（図示せず）をかぶせたりした後、第４図
に示すように外部入出力リード１の一部を除いて
全体を樹脂６でモールドしたり、またはケースに
入れたりして完成品となる。DESCRIPTION OF EMBODIMENTS Hereinafter, one embodiment of the present invention will be explained in Figures 3a and b.
This will be explained with reference to FIG. First, Figure 3a,
As shown in b, a piezoelectric element 3 to obtain one frequency characteristic is electrically and mechanically bonded with solder or conductive adhesive 4 on a printed wiring board 2 to which external input/output leads 1 are electrically connected and integrated. Further, a piezoelectric element 5 which is superimposed on the piezoelectric element 3 to obtain another frequency characteristic is electrically and mechanically connected and fixed using the solder or conductive adhesive 4. At this time, since there is a gap equal to the thickness of the solder or conductive adhesive 4 between the stacked piezoelectric elements 3 and 5, they can vibrate without interfering with each other. After covering the piezoelectric elements 3 and 5 with an elastic material or a cap (not shown), the whole is molded with resin 6 except for a part of the external input/output lead 1, as shown in FIG. Or put it in a case to become a finished product.
第５図は第２図の特性を得る本発明品の点線で
示すセラミツクフイルタを用いた回路である。 FIG. 5 shows a circuit using a ceramic filter of the present invention shown by the dotted line, which obtains the characteristics shown in FIG.
発明の効果
以上のように本発明のセラミツクフイルタによ
れば、従来異なる周波数特性のフイルタ機能を得
るのに複数個必要であつたものが１つの部品で機
能することとなり、周辺部品も削減できると共に
配線面積も小さくできるといつた特徴を有してい
る。Effects of the Invention As described above, according to the ceramic filter of the present invention, one component can function instead of the conventional one that required multiple filter functions to obtain filter functions with different frequency characteristics, and the number of peripheral components can be reduced. The feature is that the wiring area can also be reduced.
第１図は従来のセラミツクフイルタを用いた複
数の周波数特性を得るための回路図、第２図は第
１図の回路による周波数特性の一例を示す図、第
３図ａ，ｂは本発明に係るセラミツクフイルタの
一実施例を示す組立途中の正面図と側面図、第４
図は同フイルタの完成品を示す正面図、第５図は
本発明のセラミツクフイルタを応用した複数の周
波数特性を得るための一例を示す回路図である。
１……外部入出力リード、２……プリント配線
基板、３，５……圧電素子、６……樹脂。
Fig. 1 is a circuit diagram for obtaining multiple frequency characteristics using a conventional ceramic filter, Fig. 2 is a diagram showing an example of frequency characteristics by the circuit of Fig. 1, and Fig. 3 a and b are diagrams according to the present invention. A front view and a side view during assembly showing one embodiment of such a ceramic filter, No. 4
The figure is a front view showing a completed product of the same filter, and FIG. 5 is a circuit diagram showing an example of obtaining a plurality of frequency characteristics by applying the ceramic filter of the present invention. 1... External input/output lead, 2... Printed wiring board, 3, 5... Piezoelectric element, 6... Resin.
Claims (1)
的に接続固定するはんだまたは導電性接着剤の厚
みだけ隙間を設けて重ね、これを外部入出力リー
ドが電気的に接続されたプリント配線基板上に複
数個電気的に接続し、樹脂等で外装してなるセラ
ミツクフイルタ。1 Layer multiple piezoelectric elements with different frequency characteristics with a gap equal to the thickness of the solder or conductive adhesive that electrically connects and fixes them, and place them on a printed wiring board to which external input/output leads are electrically connected. A ceramic filter made by electrically connecting multiple pieces and covering them with resin, etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20301982A JPS5992612A (en) | 1982-11-18 | 1982-11-18 | Ceramic filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20301982A JPS5992612A (en) | 1982-11-18 | 1982-11-18 | Ceramic filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5992612A JPS5992612A (en) | 1984-05-28 |
| JPH0349209B2 true JPH0349209B2 (en) | 1991-07-26 |
Family
ID=16466997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20301982A Granted JPS5992612A (en) | 1982-11-18 | 1982-11-18 | Ceramic filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5992612A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0243021U (en) * | 1988-09-19 | 1990-03-26 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5533525B2 (en) * | 1973-01-18 | 1980-09-01 | ||
| JPS5850516B2 (en) * | 1977-11-10 | 1983-11-10 | 澤藤電機株式会社 | AC/DC switching power supply |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS556184Y2 (en) * | 1974-03-20 | 1980-02-13 | ||
| JPS5533525U (en) * | 1978-08-23 | 1980-03-04 | ||
| JPS623933Y2 (en) * | 1979-03-14 | 1987-01-29 | ||
| JPS5850516U (en) * | 1981-10-02 | 1983-04-05 | 松下電器産業株式会社 | ceramic trap |
-
1982
- 1982-11-18 JP JP20301982A patent/JPS5992612A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5533525B2 (en) * | 1973-01-18 | 1980-09-01 | ||
| JPS5850516B2 (en) * | 1977-11-10 | 1983-11-10 | 澤藤電機株式会社 | AC/DC switching power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5992612A (en) | 1984-05-28 |
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