GB850154A - Improvements in or relating to frequency selective electro-mechanical filters - Google Patents
Improvements in or relating to frequency selective electro-mechanical filtersInfo
- Publication number
- GB850154A GB850154A GB6793/59A GB679359A GB850154A GB 850154 A GB850154 A GB 850154A GB 6793/59 A GB6793/59 A GB 6793/59A GB 679359 A GB679359 A GB 679359A GB 850154 A GB850154 A GB 850154A
- Authority
- GB
- United Kingdom
- Prior art keywords
- elements
- oscillate
- resonant
- electro
- filter
- 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
- 230000003534 oscillatory effect Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- 229910000859 α-Fe 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 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
850,154. Electro-mechanical filters. TELEFUNKEN G.m.b.H. Feb. 26, 1959 [March 7, 1958], No. 6793/59. Class 40(8). An electro-mechanical filter includes a plurality of mechanically coupled resonant elements mechanically resonant at substantially the same frequency, but arranged to oscillate in different modes with the result that spurious resonances occur at different frequencies and are not transmitted through the filter. The arrangement shown comprises five resonant elements 1, 5, 6, 7 and 8 coupled by elements 4, 9, 10 and 11 each a quarter wavelength long (or an odd multiple thereof) at the mid-frequency of the pass band of the filter. Elements 1, 6 and 8 are cylindrical and are caused to oscillate longitudinally. Elements 5 and 7 are rods of circular or rectangular cross-section and are caused to oscillate flexurally. Input and output transducers are provided by making elements 1 and 8 of magnetostrictive material such as ferrite and associating them respectively with input and output windings 2 and 12 and permanent magnets 3 and 13. With filters having a larger number of elements, groups of a few successive elements may have the same oscillatory mode, other elements or groups of successive elements oscillating in another mode.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE850154X | 1958-03-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB850154A true GB850154A (en) | 1960-09-28 |
Family
ID=6776551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6793/59A Expired GB850154A (en) | 1958-03-07 | 1959-02-26 | Improvements in or relating to frequency selective electro-mechanical filters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB850154A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1257991B (en) * | 1963-09-13 | 1968-01-04 | Siemens Ag | Electromechanical belt filter |
| DE1275216B (en) * | 1965-03-16 | 1968-08-14 | Siemens Ag | Electromechanical filter |
-
1959
- 1959-02-26 GB GB6793/59A patent/GB850154A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1257991B (en) * | 1963-09-13 | 1968-01-04 | Siemens Ag | Electromechanical belt filter |
| DE1275216B (en) * | 1965-03-16 | 1968-08-14 | Siemens Ag | Electromechanical filter |
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