DE3520895C2 - - Google Patents
Info
- Publication number
- DE3520895C2 DE3520895C2 DE3520895A DE3520895A DE3520895C2 DE 3520895 C2 DE3520895 C2 DE 3520895C2 DE 3520895 A DE3520895 A DE 3520895A DE 3520895 A DE3520895 A DE 3520895A DE 3520895 C2 DE3520895 C2 DE 3520895C2
- Authority
- DE
- Germany
- Prior art keywords
- damping
- resonators
- piezoelectric
- resistors
- filter according
- 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
- 238000013016 damping Methods 0.000 claims description 54
- 239000000758 substrate Substances 0.000 claims description 39
- 239000004020 conductor Substances 0.000 claims description 7
- 239000011241 protective layer Substances 0.000 claims description 6
- 230000000717 retained effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 12
- 230000037431 insertion Effects 0.000 description 12
- 238000003780 insertion Methods 0.000 description 12
- 238000009413 insulation Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000013017 mechanical damping Methods 0.000 description 2
- 238000010587 phase diagram Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 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
- H03H9/605—Electric coupling means therefor consisting of a ladder configuration
-
- 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
- H03H9/1028—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 the BAW device being held between spring terminals
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)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59121023A JPH0656941B2 (ja) | 1984-06-12 | 1984-06-12 | 群遅延特性改善ラダー型圧電フィルタ |
| JP17917984U JPH0346586Y2 (US06272168-20010807-M00014.png) | 1984-11-26 | 1984-11-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3520895A1 DE3520895A1 (de) | 1985-12-12 |
| DE3520895C2 true DE3520895C2 (US06272168-20010807-M00014.png) | 1987-10-01 |
Family
ID=26458493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19853520895 Granted DE3520895A1 (de) | 1984-06-12 | 1985-06-11 | Piezoelektrische resonatoreinrichtung mit flacher gruppenlaufzeitcharakteristik |
Country Status (3)
| Country | Link |
|---|---|
| US (2) | US4651109A (US06272168-20010807-M00014.png) |
| CA (1) | CA1231398A (US06272168-20010807-M00014.png) |
| DE (1) | DE3520895A1 (US06272168-20010807-M00014.png) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0513061Y2 (US06272168-20010807-M00014.png) * | 1987-07-27 | 1993-04-06 | ||
| JPH03185908A (ja) * | 1989-12-14 | 1991-08-13 | Murata Mfg Co Ltd | トラップ回路 |
| JPH0522073A (ja) * | 1991-07-10 | 1993-01-29 | Ngk Spark Plug Co Ltd | 梯子型電気濾波器 |
| JPH0629774A (ja) * | 1992-07-07 | 1994-02-04 | Tdk Corp | 圧電セラミックフィルタ回路及び圧電セラミックフィルタ |
| US5291159A (en) * | 1992-07-20 | 1994-03-01 | Westinghouse Electric Corp. | Acoustic resonator filter with electrically variable center frequency and bandwidth |
| JP2912174B2 (ja) * | 1994-12-27 | 1999-06-28 | 日本電気株式会社 | ライブラリ群及びそれを用いた半導体集積回路 |
| EP0723334B1 (en) * | 1995-01-19 | 2003-11-26 | Matsushita Electric Industrial Co., Ltd. | Piezoelectric filter, its manufacturing method, and intermediate frequency filter |
| US5939957A (en) * | 1996-07-26 | 1999-08-17 | Ngk Spark Plug Co., Ltd. | 6-elements ladder type piezoelectric filter |
| FR2837035B1 (fr) * | 2002-03-08 | 2005-04-08 | Thales Sa | Filtre integrateur a temps continu et a variation de phase minimale, modulateur sigma-delta passe bande utilisant un tel filtre |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5210060A (en) * | 1975-07-14 | 1977-01-26 | Hitachi Ltd | Pressurized electric discrimiator |
| JPS5520052A (en) * | 1978-07-28 | 1980-02-13 | Noto Denshi Kogyo Kk | Piezoelectric filter |
| JPS639141Y2 (US06272168-20010807-M00014.png) * | 1980-10-22 | 1988-03-18 |
-
1985
- 1985-03-13 US US06/711,210 patent/US4651109A/en not_active Expired - Lifetime
- 1985-03-19 CA CA000476871A patent/CA1231398A/en not_active Expired
- 1985-06-11 DE DE19853520895 patent/DE3520895A1/de active Granted
-
1986
- 1986-07-22 US US06/887,925 patent/US4716377A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA1231398A (en) | 1988-01-12 |
| US4716377A (en) | 1987-12-29 |
| DE3520895A1 (de) | 1985-12-12 |
| US4651109A (en) | 1987-03-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition |