IT7920053A0 - Filtro elettromeccanico per segnali elettrici. - Google Patents
Filtro elettromeccanico per segnali elettrici.Info
- Publication number
- IT7920053A0 IT7920053A0 IT7920053A IT2005379A IT7920053A0 IT 7920053 A0 IT7920053 A0 IT 7920053A0 IT 7920053 A IT7920053 A IT 7920053A IT 2005379 A IT2005379 A IT 2005379A IT 7920053 A0 IT7920053 A0 IT 7920053A0
- Authority
- IT
- Italy
- Prior art keywords
- electrical signals
- electromechanical filter
- electromechanical
- filter
- signals
- Prior art date
Links
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
- H03H9/48—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)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1625978A JPS54109355A (en) | 1978-02-15 | 1978-02-15 | Mechanical filter |
Publications (2)
Publication Number | Publication Date |
---|---|
IT7920053A0 true IT7920053A0 (it) | 1979-02-09 |
IT1110718B IT1110718B (it) | 1986-01-06 |
Family
ID=11911555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT20053/79A IT1110718B (it) | 1978-02-15 | 1979-02-09 | Filtro elettromeccanico per segnali elettrici |
Country Status (7)
Country | Link |
---|---|
US (1) | US4241321A (it) |
JP (1) | JPS54109355A (it) |
CA (1) | CA1139382A (it) |
DE (1) | DE2904809A1 (it) |
FR (1) | FR2417891B1 (it) |
GB (1) | GB2017443B (it) |
IT (1) | IT1110718B (it) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4573028A (en) * | 1983-11-07 | 1986-02-25 | Rockwell International Corporation | Mechanical filter apparatus having interchanged resonator means for improved coupling of bridging wires |
US5006824A (en) * | 1986-04-07 | 1991-04-09 | Rockwell International Corporation | Third mode torsional F-M resonator |
US5187458A (en) * | 1989-09-21 | 1993-02-16 | Nihon Musen Kabushiki Kaisha | Composite longitudinal vibration mechanical filter having central frequency deviation elimination means and method of manufacturing same |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1112214B (de) * | 1957-01-12 | 1961-08-03 | Telefunken Patent | Mechanisches Filter mit Daempfungspolen bei endlichen Frequenzen |
DE1252817B (it) * | 1957-03-20 | |||
IT616267A (it) * | 1957-12-12 | |||
US2955267A (en) * | 1958-08-20 | 1960-10-04 | Bell Telephone Labor Inc | Electromechanical torsional band pass wave filter |
DE1257993B (de) * | 1961-02-28 | 1968-01-04 | Telefunken Patent | Mechanisches Frequenzfilter |
GB1041375A (en) * | 1962-06-28 | 1966-09-07 | Telefunken Patent | Mechanical frequency filter |
FR2320665A1 (fr) * | 1975-08-04 | 1977-03-04 | Telecommunications Sa | Perfectionnements aux filtres electromecaniques passe-bande de frequences |
JPS5293044A (en) * | 1976-01-30 | 1977-08-05 | Hitachi Ltd | Elevator |
-
1978
- 1978-02-15 JP JP1625978A patent/JPS54109355A/ja active Granted
-
1979
- 1979-02-08 DE DE2904809A patent/DE2904809A1/de not_active Ceased
- 1979-02-09 IT IT20053/79A patent/IT1110718B/it active
- 1979-02-14 GB GB7905235A patent/GB2017443B/en not_active Expired
- 1979-02-15 FR FR7903883A patent/FR2417891B1/fr not_active Expired
- 1979-02-15 US US06/012,390 patent/US4241321A/en not_active Expired - Lifetime
- 1979-02-15 CA CA000321548A patent/CA1139382A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US4241321A (en) | 1980-12-23 |
DE2904809A1 (de) | 1979-08-16 |
CA1139382A (en) | 1983-01-11 |
GB2017443B (en) | 1982-05-12 |
GB2017443A (en) | 1979-10-03 |
JPH0116055B2 (it) | 1989-03-22 |
FR2417891A1 (fr) | 1979-09-14 |
IT1110718B (it) | 1986-01-06 |
FR2417891B1 (fr) | 1985-09-20 |
JPS54109355A (en) | 1979-08-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19950227 |