GB1392766A - Holder for an electromechanical filter - Google Patents
Holder for an electromechanical filterInfo
- Publication number
- GB1392766A GB1392766A GB4516772A GB4516772A GB1392766A GB 1392766 A GB1392766 A GB 1392766A GB 4516772 A GB4516772 A GB 4516772A GB 4516772 A GB4516772 A GB 4516772A GB 1392766 A GB1392766 A GB 1392766A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrodes
- discs
- filter
- baseplate
- earth
- 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
- 238000012216 screening Methods 0.000 abstract 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 230000000712 assembly Effects 0.000 abstract 1
- 238000000429 assembly Methods 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 abstract 1
- 239000004020 conductor Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 239000010453 quartz Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 229910000679 solder Inorganic materials 0.000 abstract 1
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
- H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
- H03H9/58—Multiple crystal filters
- H03H9/60—Electric coupling means therefor
-
- 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
- H03H9/05—Holders; Supports
- H03H9/10—Mounting in enclosures
- H03H9/1007—Mounting in enclosures for bulk acoustic wave [BAW] devices
- H03H9/1014—Mounting in enclosures for bulk acoustic wave [BAW] devices the enclosure being defined by a frame built on a substrate and a cap, the frame having no mechanical contact with the BAW device
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
1392766 Component assemblies LICENTIA PATENT-VERWALTUNGS GmbH 29 Sept 1972 [29 Sept 1971] 45167/72 Heading H1R [Also in Division H3] A holder for a filter comprising a plurality of transducers and resonators sandwiching a pair of quartz or ceramic discs 1, 2 comprises a screening plate 10 made of two sheets, spot welded together and serving to reduce input to output capacitance, mounted upon a baseplate 12, of conductive material or silver coated, webs 11, 11<SP>1</SP>, see also Fig. 4 (not shown), engaging the edges of the discs 1, 2 to support them, and provide earth connections to resonator and transducer electrodes, the webs being fixed to the discs by conductive adhesive, or solder (18, Fig. 4). A screening can 13, soft soldered or cold press welded to baseplate 12 has a closable opening 19 allowing evacuation of the interior, or its filling with gas. Filter construction.-The filter comprises a pair of sub-filters connected in series, each mounted on one of the discs and comprising input, and output electrodes (3, 6; 4, 7), Figs. 1, 2 (not shown) and intermediate resonators with electrodes (5, 8), all the resonator electrodes being connected to earth. All non-earthed electrodes (3, 4, 6, 7) are mounted on sides of the discs remote from the screen 10, in a recess of which is supported shunt capacitor 9. Conductive paths 17, 17<SP>1</SP> are provided on the discs between electrodes, those apertaining to electrodes (3, 4), 6 and 7 being directed to the edge of the respective disc adjacent the baseplate 12. The angular displacement between the plane of the screening plate 10, and major axis of baseplate 12 is stated to increase the decoupling between the input terminal 15, and the output terminal 16. An earth terminal 14 is provided. The filter is used as an I.F. filter, at specified frequencies, for radio telephone communication.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19712148495 DE2148495C3 (en) | 1971-09-29 | Holder for an electromechanical filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1392766A true GB1392766A (en) | 1975-04-30 |
Family
ID=5820843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4516772A Expired GB1392766A (en) | 1971-09-29 | 1972-09-29 | Holder for an electromechanical filter |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS4843249A (en) |
| FR (1) | FR2154606A1 (en) |
| GB (1) | GB1392766A (en) |
| IT (1) | IT967193B (en) |
| SE (1) | SE379464B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2125616A (en) * | 1982-07-07 | 1984-03-07 | Gen Electric | Monolithic crystal filters |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59127897A (en) * | 1983-01-12 | 1984-07-23 | 富士ゼロックス株式会社 | Method of forming thick film pattern |
| US4533885A (en) * | 1983-04-27 | 1985-08-06 | Motorola, Inc. | Apparatus for suppression of spurious attenuation poles in crystal filters |
-
1972
- 1972-09-06 IT IT2887072A patent/IT967193B/en active
- 1972-09-20 JP JP9444372A patent/JPS4843249A/ja active Pending
- 1972-09-26 FR FR7234042A patent/FR2154606A1/fr not_active Withdrawn
- 1972-09-29 GB GB4516772A patent/GB1392766A/en not_active Expired
- 1972-09-29 SE SE1260172A patent/SE379464B/xx unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2125616A (en) * | 1982-07-07 | 1984-03-07 | Gen Electric | Monolithic crystal filters |
Also Published As
| Publication number | Publication date |
|---|---|
| SE379464B (en) | 1975-10-06 |
| JPS4843249A (en) | 1973-06-22 |
| DE2148495B2 (en) | 1975-08-21 |
| DE2148495A1 (en) | 1973-04-05 |
| IT967193B (en) | 1974-02-28 |
| FR2154606A1 (en) | 1973-05-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |