JPS5475971A - Surface elastic wave device - Google Patents
Surface elastic wave deviceInfo
- Publication number
- JPS5475971A JPS5475971A JP14273177A JP14273177A JPS5475971A JP S5475971 A JPS5475971 A JP S5475971A JP 14273177 A JP14273177 A JP 14273177A JP 14273177 A JP14273177 A JP 14273177A JP S5475971 A JPS5475971 A JP S5475971A
- Authority
- JP
- Japan
- Prior art keywords
- idtr
- output
- substrate
- deltaf
- input
- 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.)
- Granted
Links
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
- H03H9/02—Details
- H03H9/02535—Details of surface acoustic wave devices
- H03H9/02818—Means for compensation or elimination of undesirable effects
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
PURPOSE:To obtain a high-precision peak frequency characteristic by providing a bonding pad in the position which has the same distance from a pair of inter- digital transducers LDTR connected in parallel to each other by a wiring electrode on a piezo-electric substrate. CONSTITUTION:At one edge of piezo-electric substrate 13, input IDTR 14 is provided, and terminals 11 and 11' are provided through bonding pads PPAD21 and 21' for input. At the other edge of substrate 13, output LDTR 15 and 16 are provided, and are connected to terminals 12 and 12' through PPAD22 and 22' for output in middle position x/2 of distance x between IDTR 15 and 16. Shield electrode 19 is provided between input IDTR 14 and output IDTR 15. For the purpose of realizing prescribed frequency interval DELTAf, x is set to satisfy x=vs/DELTAf when the surface elastic wave speed of substrate 13 is denoted as vs. Then, electric signals from IDTR 15 and 16 reach PPAD22 with the same delay time and attenuation quantity because output PPAD 22 and 22' are set to x/2, so that influences of the delay time on frequency interval DELTAf can be ignored.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52142731A JPS5832528B2 (en) | 1977-11-30 | 1977-11-30 | surface acoustic wave device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52142731A JPS5832528B2 (en) | 1977-11-30 | 1977-11-30 | surface acoustic wave device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5475971A true JPS5475971A (en) | 1979-06-18 |
JPS5832528B2 JPS5832528B2 (en) | 1983-07-13 |
Family
ID=15322260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52142731A Expired JPS5832528B2 (en) | 1977-11-30 | 1977-11-30 | surface acoustic wave device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5832528B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5210652A (en) * | 1975-07-16 | 1977-01-27 | Toshiba Corp | Elastic surface wave device |
-
1977
- 1977-11-30 JP JP52142731A patent/JPS5832528B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5210652A (en) * | 1975-07-16 | 1977-01-27 | Toshiba Corp | Elastic surface wave device |
Also Published As
Publication number | Publication date |
---|---|
JPS5832528B2 (en) | 1983-07-13 |
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