JPH028220U - - Google Patents
Info
- Publication number
- JPH028220U JPH028220U JP8520888U JP8520888U JPH028220U JP H028220 U JPH028220 U JP H028220U JP 8520888 U JP8520888 U JP 8520888U JP 8520888 U JP8520888 U JP 8520888U JP H028220 U JPH028220 U JP H028220U
- Authority
- JP
- Japan
- Prior art keywords
- variable
- electrodes
- capacitance
- control voltage
- resonant
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 claims description 3
- 239000003989 dielectric material Substances 0.000 claims description 2
- 239000013013 elastic material Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Filters And Equalizers (AREA)
Description
第１図は本考案の一実施例を示すブロツク図、
第２図は第１図の可変容量素子の構成を示す縦断
面図、第３図はその等価回路図、第４図は共振器
における共振周波数の変更状態を示す図、第５図
は従来の周波数可変型フイルターを示すブロツク
図である。
１……共振器、２……可変容量素子、１１……
圧電体、１２……誘電体、１３，１４，１５……
第１，２，３の電極。
FIG. 1 is a block diagram showing an embodiment of the present invention.
Figure 2 is a vertical cross-sectional view showing the configuration of the variable capacitance element in Figure 1, Figure 3 is its equivalent circuit diagram, Figure 4 is a diagram showing how the resonant frequency is changed in the resonator, and Figure 5 is the conventional FIG. 3 is a block diagram showing a variable frequency filter. 1... Resonator, 2... Variable capacitance element, 11...
Piezoelectric material, 12... Dielectric material, 13, 14, 15...
1st, 2nd, and 3rd electrodes.
Claims (1)
させて共振回路の共振周波数を変えるようになし
た周波数可変型フイルターにおいて、 前記可変容量素子が圧電体と弾力性のある誘電
体と電極との積層体をケースに収納して両端の間
隔を一定に保持した構成であり、圧電体を挾む両
電極に前記制御電圧が印加され、また誘電体を挾
む両電極間の静電容量により前記共振回路の共振
周波数を変えるようになしてあることを特徴とす
る周波数可変型フイルター。[Claims for Utility Model Registration] A variable frequency filter in which the capacitance of a variable capacitance element is changed depending on a control voltage to change the resonant frequency of a resonant circuit, wherein the variable capacitance element is made of a piezoelectric material and an elastic material. The structure is such that a laminate of a certain dielectric material and an electrode is housed in a case and the distance between both ends is kept constant, and the control voltage is applied to both electrodes that sandwich the piezoelectric material, and 1. A variable frequency filter, characterized in that the resonant frequency of the resonant circuit is changed by capacitance between electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8520888U JPH028220U (en) | 1988-06-28 | 1988-06-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8520888U JPH028220U (en) | 1988-06-28 | 1988-06-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH028220U true JPH028220U (en) | 1990-01-19 |
Family
ID=31309881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8520888U Pending JPH028220U (en) | 1988-06-28 | 1988-06-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH028220U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003530705A (en) * | 2000-04-06 | 2003-10-14 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Tunable filter configuration |
-
1988
- 1988-06-28 JP JP8520888U patent/JPH028220U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003530705A (en) * | 2000-04-06 | 2003-10-14 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Tunable filter configuration |