JPS5564417A - Mechanical filter - Google Patents
Mechanical filterInfo
- Publication number
- JPS5564417A JPS5564417A JP13856378A JP13856378A JPS5564417A JP S5564417 A JPS5564417 A JP S5564417A JP 13856378 A JP13856378 A JP 13856378A JP 13856378 A JP13856378 A JP 13856378A JP S5564417 A JPS5564417 A JP S5564417A
- Authority
- JP
- Japan
- Prior art keywords
- input
- mechanical filter
- filter
- parallel
- output
- 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
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
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
PURPOSE:To simplify input-output matching by allowing the input-output transformer of a mechanical filter to resonate in parallel at the center frequency of the filter. CONSTITUTION:A mechanical filter is equivalently constituted by connecting capacitor Ce of a piezoelectric element in parallel to a LC circuit with chebyshev characteristics. An input-output transformer can be expressed by inductance component Le. For the purpose, capacitor Ce and inductance Le are enabled by setting to resonate in parallel at the center frequency of the mechanical filter. Even when capacitor Ce and input-output impedance of the piezoelectric element are freely selected, inductance component Le and winding ration (n) of the transformer are adequately set, so that input-output matching can easily be attained without deteriorating filter characteristics.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13856378A JPS5564417A (en) | 1978-11-10 | 1978-11-10 | Mechanical filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13856378A JPS5564417A (en) | 1978-11-10 | 1978-11-10 | Mechanical filter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5564417A true JPS5564417A (en) | 1980-05-15 |
Family
ID=15225058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13856378A Pending JPS5564417A (en) | 1978-11-10 | 1978-11-10 | Mechanical filter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5564417A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01114111A (en) * | 1987-10-27 | 1989-05-02 | Yokogawa Electric Corp | Mechanical filter |
JPH0252514A (en) * | 1988-08-17 | 1990-02-22 | Yokogawa Electric Corp | Mechanical filter |
-
1978
- 1978-11-10 JP JP13856378A patent/JPS5564417A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01114111A (en) * | 1987-10-27 | 1989-05-02 | Yokogawa Electric Corp | Mechanical filter |
JPH0252514A (en) * | 1988-08-17 | 1990-02-22 | Yokogawa Electric Corp | Mechanical filter |
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