IT1110718B - Filtro elettromeccanico per segnali elettrici - Google Patents

Filtro elettromeccanico per segnali elettrici

Info

Publication number
IT1110718B
IT1110718B IT20053/79A IT2005379A IT1110718B IT 1110718 B IT1110718 B IT 1110718B IT 20053/79 A IT20053/79 A IT 20053/79A IT 2005379 A IT2005379 A IT 2005379A IT 1110718 B IT1110718 B IT 1110718B
Authority
IT
Italy
Prior art keywords
electric signals
electromechanical filter
electromechanical
filter
signals
Prior art date
Application number
IT20053/79A
Other languages
English (en)
Other versions
IT7920053A0 (it
Original Assignee
Fujitsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of IT7920053A0 publication Critical patent/IT7920053A0/it
Application granted granted Critical
Publication of IT1110718B publication Critical patent/IT1110718B/it

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)
IT20053/79A 1978-02-15 1979-02-09 Filtro elettromeccanico per segnali elettrici IT1110718B (it)

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 IT7920053A0 (it) 1979-02-09
IT1110718B true 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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
NL233996A (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
US3445792A (en) * 1962-06-28 1969-05-20 Telefunken Patent Mechanical frequency filter with additional coupling to increase slope of damping rise
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

Also Published As

Publication number Publication date
IT7920053A0 (it) 1979-02-09
JPH0116055B2 (it) 1989-03-22
JPS54109355A (en) 1979-08-27
DE2904809A1 (de) 1979-08-16
CA1139382A (en) 1983-01-11
FR2417891B1 (fr) 1985-09-20
GB2017443A (en) 1979-10-03
US4241321A (en) 1980-12-23
GB2017443B (en) 1982-05-12
FR2417891A1 (fr) 1979-09-14

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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