GB1287002A - Acoustic energy translating devices - Google Patents
Acoustic energy translating devicesInfo
- Publication number
- GB1287002A GB1287002A GB52467/69A GB5246769A GB1287002A GB 1287002 A GB1287002 A GB 1287002A GB 52467/69 A GB52467/69 A GB 52467/69A GB 5246769 A GB5246769 A GB 5246769A GB 1287002 A GB1287002 A GB 1287002A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resonators
- band
- wafer
- mass
- pass
- 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
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 230000008021 deposition Effects 0.000 abstract 2
- 239000013078 crystal Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000000034 method 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
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
- H03H9/56—Monolithic crystal filters
- H03H9/566—Electric coupling means therefor
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
- H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
- H03H3/02—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks
- H03H3/04—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks for obtaining desired frequency or temperature coefficient
- H03H2003/0414—Resonance frequency
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
1287002 Electromechanical filters WESTERN ELECTRIC CO Inc 27 Oct 1969 [30 Oct 1968] 52467/69 Heading H3U A bandpass filter, Fig. 2, comprises a quartz crystal wafer 18 having resonators formed by a pair of input electrodes 10, 12 and a pair of output electrodes 14, 16. The resonators vibrate in the thickness shear mode and are " controlled coupled", i.e. the spacing between the electrode pairs is great enough to ensure that coupling between the resonator is less than a certain amount. Preferably the coupling between the resonators is small enough to ensure that their antiresonant frequencies fall outside the passband (Figs. 9-11, not shown). The pass-band may be varied by varying the mass of the electrodes. However, this method also varies the mid-band frequency and to overcome this difficulty fine adjustment of the pass-band is obtained by varying the mass of the wafer 18 in the space situated between the resonators. Thus, a deposition 24 of the required mass is plated in the wafer, this mass causing only a slight variation in the mid-band frequency. In another embodiment, Fig. 20, utilizing four resonators, fine adjustment of the pass-band is obtained by removing material from the wafer 82 in the form of recesses 84 and also by adding a deposition 86.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US77184368A | 1968-10-30 | 1968-10-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1287002A true GB1287002A (en) | 1972-08-31 |
Family
ID=25093109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB52467/69A Expired GB1287002A (en) | 1968-10-30 | 1969-10-27 | Acoustic energy translating devices |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3573672A (en) |
| BE (1) | BE740969A (en) |
| CH (1) | CH501340A (en) |
| DE (1) | DE1953826C2 (en) |
| FR (1) | FR2021887A1 (en) |
| GB (1) | GB1287002A (en) |
| NL (1) | NL155693B (en) |
| SE (1) | SE365083B (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3699484A (en) * | 1970-06-24 | 1972-10-17 | Vernitron Corp | Width extensional resonator and coupled mode filter |
| US3697788A (en) * | 1970-09-30 | 1972-10-10 | Motorola Inc | Piezoelectric resonating device |
| US3676805A (en) * | 1970-10-12 | 1972-07-11 | Bell Telephone Labor Inc | Monolithic crystal filter with auxiliary filter shorting tabs |
| US3732510A (en) * | 1970-10-12 | 1973-05-08 | Bell Telephone Labor Inc | Multisection precision-tuned monolithic crystal filters |
| JPS5329265B2 (en) * | 1972-09-20 | 1978-08-19 | ||
| US4112147A (en) * | 1977-05-13 | 1978-09-05 | Western Electric Company, Inc. | Method of manufacturing a monolithic crystal filter |
| DE2823540C2 (en) * | 1977-06-08 | 1985-04-18 | Kinseki Ltd., Tokio/Tokyo | Piezoelectric multiple resonator |
| US4329666A (en) * | 1980-08-11 | 1982-05-11 | Motorola, Inc. | Two-pole monolithic crystal filter |
| US4676993A (en) * | 1984-11-29 | 1987-06-30 | General Electric Company | Method and apparatus for selectively fine-tuning a coupled-dual resonator crystal and crystal manufactured thereby |
| US4627379A (en) * | 1984-11-29 | 1986-12-09 | General Electric Company | Shutter apparatus for fine-tuning a coupled-dual resonator crystal |
| US4833430A (en) * | 1984-11-29 | 1989-05-23 | General Electric Company | Coupled-dual resonator crystal |
| US4839618A (en) * | 1987-05-26 | 1989-06-13 | General Electric Company | Monolithic crystal filter with wide bandwidth and method of making same |
| WO1992019043A1 (en) * | 1991-04-22 | 1992-10-29 | Motorola, Inc. | Surface mountable piezoelectric device with in situ finish plate mask |
| DE69416129T2 (en) * | 1994-10-10 | 1999-07-01 | Endress + Hauser GmbH + Co., 79689 Maulburg | A method for operating an ultrasonic transducer and circuit arrangement for performing the method |
| JPH1098350A (en) * | 1996-07-31 | 1998-04-14 | Daishinku Co | Piezoelectric vibrating device |
| US6020797A (en) * | 1998-08-21 | 2000-02-01 | Cts Corporation | Electrode connection configuration and method for a multi-pole monolithic crystal filter |
| JP2008206139A (en) * | 2007-01-25 | 2008-09-04 | Matsushita Electric Ind Co Ltd | Dual mode piezoelectric filter, method of manufacturing the filter, high frequency circuit component and communication device using the filter |
| JP2008245243A (en) * | 2007-02-26 | 2008-10-09 | Epson Toyocom Corp | Contour resonator and adjustment method therefor |
| FR2966306B1 (en) | 2010-10-15 | 2013-06-14 | Commissariat Energie Atomique | BAW FILTER WITH SIDE COUPLING USING PHONONIC CRYSTALS |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2345491A (en) * | 1941-11-25 | 1944-03-28 | Bell Telephone Labor Inc | Wave transmission network |
| US2859346A (en) * | 1954-07-28 | 1958-11-04 | Motorola Inc | Crystal oscillator |
| US2956184A (en) * | 1954-11-01 | 1960-10-11 | Honeywell Regulator Co | Transducer |
| NL277292A (en) * | 1961-06-20 | |||
| US3271704A (en) * | 1963-03-25 | 1966-09-06 | Bell Telephone Labor Inc | Ultrasonic delay device |
| US3382381A (en) * | 1965-05-27 | 1968-05-07 | Piezo Technology Inc | Tab plateback |
| FR1523518A (en) * | 1966-04-11 | 1968-05-03 | Western Electric Co | Acoustic device used to transmit energy between two energy circuits |
-
1968
- 1968-10-30 US US771843A patent/US3573672A/en not_active Expired - Lifetime
-
1969
- 1969-10-22 SE SE14466/69A patent/SE365083B/xx unknown
- 1969-10-24 FR FR6936540A patent/FR2021887A1/fr not_active Withdrawn
- 1969-10-24 NL NL6916084.A patent/NL155693B/en not_active IP Right Cessation
- 1969-10-25 DE DE1953826A patent/DE1953826C2/en not_active Expired
- 1969-10-27 CH CH1598269A patent/CH501340A/en not_active IP Right Cessation
- 1969-10-27 GB GB52467/69A patent/GB1287002A/en not_active Expired
- 1969-10-29 BE BE740969D patent/BE740969A/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FR2021887A1 (en) | 1970-07-24 |
| SE365083B (en) | 1974-03-11 |
| DE1953826A1 (en) | 1970-05-21 |
| BE740969A (en) | 1970-04-01 |
| DE1953826C2 (en) | 1985-02-14 |
| NL155693B (en) | 1978-01-16 |
| CH501340A (en) | 1970-12-31 |
| NL6916084A (en) | 1970-05-04 |
| US3573672A (en) | 1971-04-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |