JPH0358031U - - Google Patents
Info
- Publication number
- JPH0358031U JPH0358031U JP11890889U JP11890889U JPH0358031U JP H0358031 U JPH0358031 U JP H0358031U JP 11890889 U JP11890889 U JP 11890889U JP 11890889 U JP11890889 U JP 11890889U JP H0358031 U JPH0358031 U JP H0358031U
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- coil
- signal
- phase excitation
- excitation circuit
- 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
- 230000005284 excitation Effects 0.000 claims description 4
- 238000010897 surface acoustic wave method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Description
第１図は本考案の一実施例を示す弾性表面波一
方向性トランスデユーサの４相励振回路図、第２
図は振幅と位相関係を示す説明図、第３図は従来
のトランスバーサル型フイルタの平面図、第４図
は従来の４相励振回路図である。
２０……信号源、２１……信号源インピーダン
ス、２２……９０°ハイブリツド、２３……４端
子コイル、２４……入力端子、２５……４端子コ
イル、２６，２６′，２７，２７′……入力端子
、２８，２９，３０，３１……出力端子、３２…
…圧電基板、３３……ＩＤＴまたはマルチストリ
ツプカプラ、３４……ボンデイングワイヤ。
Figure 1 is a four-phase excitation circuit diagram of a surface acoustic wave unidirectional transducer showing one embodiment of the present invention;
FIG. 3 is a plan view of a conventional transversal type filter, and FIG. 4 is a diagram of a conventional four-phase excitation circuit. 20... Signal source, 21... Signal source impedance, 22... 90° hybrid, 23... 4-terminal coil, 24... Input terminal, 25... 4-terminal coil, 26, 26', 27, 27'... ...Input terminal, 28, 29, 30, 31...Output terminal, 32...
...piezoelectric substrate, 33...IDT or multi-strip coupler, 34...bonding wire.
Claims (1)
チストリツプから成る一方向性トランスデユーサ
において、前記４相励振回路が、 信号源からの信号が第１の端子に印加される第
１の４端子コイルと、 第１の４端子コイルの第２の端子からの信号が
第５の端子に印加され、第６、第７の端子からそ
れぞれ第１、第３の出力信号を得る第２の４端子
コイルと、 前記第１の４端子コイルの第３の端子からの信
号が第９の端子に印加され、第１０、第１１の端
子からそれぞれ第２、第４の出力信号を得る第３
の４端子コイルとから構成されていることを特徴
とする弾性表面波一方向性トランスデユーサ。[Claims for Utility Model Registration] In a unidirectional transducer comprising a four-phase excitation circuit and a transducer or a multi-strip, the four-phase excitation circuit comprises a first terminal to which a signal from a signal source is applied. The signal from the second terminal of the first four-terminal coil is applied to the fifth terminal, and the first and third output signals are obtained from the sixth and seventh terminals, respectively. Signals from the second four-terminal coil and the third terminal of the first four-terminal coil are applied to the ninth terminal, and second and fourth output signals are obtained from the tenth and eleventh terminals, respectively. Third
A surface acoustic wave unidirectional transducer comprising a four-terminal coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11890889U JPH0358031U (en) | 1989-10-11 | 1989-10-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11890889U JPH0358031U (en) | 1989-10-11 | 1989-10-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0358031U true JPH0358031U (en) | 1991-06-05 |
Family
ID=31667050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11890889U Pending JPH0358031U (en) | 1989-10-11 | 1989-10-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0358031U (en) |
-
1989
- 1989-10-11 JP JP11890889U patent/JPH0358031U/ja active Pending
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