GB1219066A - Improvements in or relating to electromechanical filters - Google Patents
Improvements in or relating to electromechanical filtersInfo
- Publication number
- GB1219066A GB1219066A GB4717769A GB4717769A GB1219066A GB 1219066 A GB1219066 A GB 1219066A GB 4717769 A GB4717769 A GB 4717769A GB 4717769 A GB4717769 A GB 4717769A GB 1219066 A GB1219066 A GB 1219066A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resonator
- members
- mode
- quality factor
- base
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders or supports
- H03H9/0504—Holders or supports for bulk acoustic wave devices
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/46—Filters
- H03H9/48—Coupling means therefor
- H03H9/50—Mechanical coupling means
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
1,219,066. Electromechanical filters. STANDARD TELEPHONES & CABLES Ltd. 25 Sept., 1969, No. 47177/69. Heading H3U. Unwanted vibrational modes of a filter are attenuated by supporting the resonator element by means of a mounting arrangement having a low quality factor, this arrangement supporting the resonator element at a position corresponding to a mode of the desired vibrational mode. As shown in Figs. 1, 2, a resonator 1 vibrating in the flexural mode is supported on a base 2 by members 3 situated at the nodes, these members extending through bushes 4 of low quality factor material, e.g. rubber. In a modification, Fig. 3, the rubber bushes 5 are provided in the base 2. There may be a number of resonators arranged side-by-side (Fig. 4, not shown). In a further modification of Figs. 1, 2, the axes of the members 3 are arranged perpendicularly to the major faces of the resonator (Fig. 5, not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4717769A GB1219066A (en) | 1969-09-25 | 1969-09-25 | Improvements in or relating to electromechanical filters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4717769A GB1219066A (en) | 1969-09-25 | 1969-09-25 | Improvements in or relating to electromechanical filters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1219066A true GB1219066A (en) | 1971-01-13 |
Family
ID=10444030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4717769A Expired GB1219066A (en) | 1969-09-25 | 1969-09-25 | Improvements in or relating to electromechanical filters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1219066A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004038341A2 (en) * | 2002-10-25 | 2004-05-06 | Endress + Hauser Flowtec Ag | Process measuring instrument |
| US7523662B2 (en) | 2002-10-25 | 2009-04-28 | Endress + Hauser Flowtec Ag | Process meter |
-
1969
- 1969-09-25 GB GB4717769A patent/GB1219066A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004038341A2 (en) * | 2002-10-25 | 2004-05-06 | Endress + Hauser Flowtec Ag | Process measuring instrument |
| WO2004038341A3 (en) * | 2002-10-25 | 2004-10-28 | Flowtec Ag | Process measuring instrument |
| US7523662B2 (en) | 2002-10-25 | 2009-04-28 | Endress + Hauser Flowtec Ag | Process meter |
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