GB1073963A - Improvements in or relating to electromechanical oscillators - Google Patents
Improvements in or relating to electromechanical oscillatorsInfo
- Publication number
- GB1073963A GB1073963A GB20713/64A GB2071364A GB1073963A GB 1073963 A GB1073963 A GB 1073963A GB 20713/64 A GB20713/64 A GB 20713/64A GB 2071364 A GB2071364 A GB 2071364A GB 1073963 A GB1073963 A GB 1073963A
- Authority
- GB
- United Kingdom
- Prior art keywords
- harmonics
- crystals
- harmonic
- piezo
- suppressed
- 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
- 239000013078 crystal Substances 0.000 abstract 6
- 238000005452 bending Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 230000003340 mental effect Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 abstract 1
- 230000010287 polarization Effects 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 piezo-electric or electrostrictive material
- H03H9/56—Monolithic crystal filters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/17—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator
Abstract
1,073,963. Electromechanical oscillators. SIEMENS A.G. May 20, 1964 [May 21, 1963], No. 20713/64. Heading H3U. An electromechanical resonator is divided into sections by two or more piezo-electric elements so located as to excite one or more even harmonics and suppress the fundamental and odd harmonics, or to excite the funda. mental and one or more odd harmonics and suppress the even harmonics; the piezoelectric elements are each composed of two plates, one on each side of the neutral axis of the resonator and have their planes perpendicular to the longitudinal axis of the resonator so as to excite bending oscillations therein; the piezo-electric elements are located at stress nodes of the harmonics to be suppressed, or are arranged so that the stresses cancel out at harmonics to be suppressed. The construction of the resonator and the attachment of the piezo-electric elements thereto is the same as in Specification 1,073,964. In Fig. 7 two pairs of piezo-electric crystals 15, 17 are located equi-distant from the centre and are oppositely polarized, so that stresses at the even harmonic frequencies cancel out. If the crystals are at nodes of the third harmonic this also will be supprossed, leaving only the fundamental, fifth and higher odd harmonics. By changing the direction of polarization in one 'pair of elements (Fig. 8, not shown) the fundamental, and odd harmonics will be suppressed, and by locating the elements at the nodes of the fourth harmonic only the second, sixth and higher even harmonics will be excited. By adding two further pairs of crystals to the arrangement of Fig. 7 (Fig. 13, not shown) the fifth harmonic will also be suppressed. Modifications of Fig. 7 which produce the same result are (a) one pair of crystals at the centre and one pair at the node of the third harmonic, the two pairs being mutually oppositely polarized (Fig. 12, not shown), and (b) each crystal being replaced by a pair of oppositely polarized crystals with a conductive layer between them (Fig. 10, not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES85317A DE1277463B (en) | 1963-05-21 | 1963-05-21 | Mechanical oscillator with electrostrictive excitation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1073963A true GB1073963A (en) | 1967-06-28 |
Family
ID=7512290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20713/64A Expired GB1073963A (en) | 1963-05-21 | 1964-05-20 | Improvements in or relating to electromechanical oscillators |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3376521A (en) |
| AT (1) | AT261682B (en) |
| BE (1) | BE648208A (en) |
| CH (1) | CH430901A (en) |
| DE (2) | DE1616526B2 (en) |
| FR (1) | FR1395326A (en) |
| GB (1) | GB1073963A (en) |
| NL (1) | NL140115B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1277614A (en) * | 1969-03-07 | 1972-06-14 | Standard Telephones Cables Ltd | An electromechanical resonator |
| JPS4969283A (en) * | 1972-11-08 | 1974-07-04 | ||
| DE2945243A1 (en) * | 1978-11-13 | 1980-05-14 | Fujitsu Ltd | BENDING VIBRATOR |
| DE3423492A1 (en) * | 1984-06-26 | 1986-01-02 | Siemens AG, 1000 Berlin und 8000 München | Electro-mechanical transducer resonator for generating mechanical bending vibrations |
| US5006824A (en) * | 1986-04-07 | 1991-04-09 | Rockwell International Corporation | Third mode torsional F-M resonator |
| JPH09172344A (en) * | 1995-12-19 | 1997-06-30 | Murata Mfg Co Ltd | Piezoelectric resonator |
| TWI493868B (en) * | 2013-01-02 | 2015-07-21 | Ind Tech Res Inst | Microelectromechanicalsystem-based resonator device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1747837A (en) * | 1925-08-05 | 1930-02-18 | Western Electric Co | Oscillation generator |
| US2569460A (en) * | 1946-05-23 | 1951-10-02 | Bendix Aviat Corp | Magneto |
| US3015789A (en) * | 1956-04-23 | 1962-01-02 | Toyotsushinki Kabushiki Kaisha | Mechanical filter |
| GB840815A (en) * | 1957-03-06 | 1960-07-13 | Gen Electric Co Ltd | Improvements in or relating to electro-mechanical resonators |
| US3028564A (en) * | 1960-06-14 | 1962-04-03 | Kokusai Electric Co Ltd | Mechanical filter |
| NL283723A (en) * | 1961-09-29 | |||
| US3311760A (en) * | 1963-11-21 | 1967-03-28 | Westinghouse Electric Corp | High q resonator |
-
1963
- 1963-05-21 DE DE19631616526 patent/DE1616526B2/en active Pending
- 1963-05-21 DE DES85317A patent/DE1277463B/en active Granted
-
1964
- 1964-05-11 AT AT285867A patent/AT261682B/en active
- 1964-05-15 FR FR974750A patent/FR1395326A/en not_active Expired
- 1964-05-19 US US368717A patent/US3376521A/en not_active Expired - Lifetime
- 1964-05-19 NL NL646405540A patent/NL140115B/en unknown
- 1964-05-20 GB GB20713/64A patent/GB1073963A/en not_active Expired
- 1964-05-21 BE BE648208D patent/BE648208A/xx unknown
- 1964-05-21 CH CH663364A patent/CH430901A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH430901A (en) | 1967-02-28 |
| DE1616526A1 (en) | 1971-04-29 |
| AT261682B (en) | 1968-05-10 |
| DE1616526B2 (en) | 1972-05-18 |
| BE648208A (en) | 1964-11-23 |
| FR1395326A (en) | 1965-04-09 |
| NL6405540A (en) | 1964-11-23 |
| DE1277463C2 (en) | 1977-06-30 |
| US3376521A (en) | 1968-04-02 |
| DE1277463B (en) | 1968-09-12 |
| NL140115B (en) | 1973-10-15 |
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