DE2139218B2 - - Google Patents

Info

Publication number
DE2139218B2
DE2139218B2 DE2139218A DE2139218A DE2139218B2 DE 2139218 B2 DE2139218 B2 DE 2139218B2 DE 2139218 A DE2139218 A DE 2139218A DE 2139218 A DE2139218 A DE 2139218A DE 2139218 B2 DE2139218 B2 DE 2139218B2
Authority
DE
Germany
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.)
Granted
Application number
DE2139218A
Other versions
DE2139218C3 (de
DE2139218A1 (de
Inventor
Arthur Rechtman Allentown Pa. Braun (V.St.A.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of DE2139218A1 publication Critical patent/DE2139218A1/de
Publication of DE2139218B2 publication Critical patent/DE2139218B2/de
Application granted granted Critical
Publication of DE2139218C3 publication Critical patent/DE2139218C3/de
Expired legal-status Critical Current

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
    • H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
    • H03H9/56—Monolithic crystal filters
    • H03H9/566—Electric coupling means therefor

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
DE2139218A 1970-08-12 1971-08-05 Monolithisches Kristallfilter Expired DE2139218C3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6320470A 1970-08-12 1970-08-12

Publications (3)

Publication Number Publication Date
DE2139218A1 DE2139218A1 (de) 1972-02-17
DE2139218B2 true DE2139218B2 (de) 1974-05-09
DE2139218C3 DE2139218C3 (de) 1974-12-19

Family

ID=22047661

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2139218A Expired DE2139218C3 (de) 1970-08-12 1971-08-05 Monolithisches Kristallfilter

Country Status (10)

Country Link
US (1) US3656180A (de)
JP (1) JPS5116093B1 (de)
BE (1) BE771051A (de)
CA (1) CA925967A (de)
DE (1) DE2139218C3 (de)
ES (1) ES394607A1 (de)
FR (1) FR2104192A5 (de)
GB (1) GB1363918A (de)
NL (1) NL162523C (de)
SE (1) SE361800B (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739304A (en) * 1971-09-27 1973-06-12 Bell Telephone Labor Inc Resonator interconnections in monolithic crystal filters
JPS5329265B2 (de) * 1972-09-20 1978-08-19
US3947784A (en) * 1974-09-19 1976-03-30 Motorola, Inc. Dual-coupled monolithic crystal element for modifying response of filter
US3944951A (en) * 1974-11-21 1976-03-16 Bell Telephone Laboratories, Incorporated Monolithic crystal filter
US4484158A (en) * 1982-07-07 1984-11-20 General Electric Company Monolithic crystal filter and method of manufacturing same
US4604543A (en) * 1984-11-29 1986-08-05 Hitachi, Ltd. Multi-element ultrasonic transducer
GB0014963D0 (en) * 2000-06-20 2000-08-09 Koninkl Philips Electronics Nv A bulk acoustic wave device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2198684A (en) * 1938-09-20 1940-04-30 Bell Telephone Labor Inc Wave filter
US2373431A (en) * 1943-03-30 1945-04-10 Bell Telephone Labor Inc Electric wave filter
US3185943A (en) * 1956-04-23 1965-05-25 Toyotsushinki Kabushiki Kaisha One-piece mechanical filter having portions forming plural resonators and coupling means
US3222622A (en) * 1962-08-14 1965-12-07 Clevite Corp Wave filter comprising piezoelectric wafer electroded to define a plurality of resonant regions independently operable without significant electro-mechanical interaction
FR1430874A (fr) * 1963-12-12 1966-03-11 Commissariat Energie Atomique Magnétomètre à résonances magnétiques
US3334307A (en) * 1966-11-14 1967-08-01 Zenith Radio Corp Multi-electrode acoustic amplifier with unitary transducing and translating medium

Also Published As

Publication number Publication date
BE771051A (fr) 1971-12-16
NL162523B (nl) 1979-12-17
SE361800B (de) 1973-11-12
FR2104192A5 (de) 1972-04-14
JPS5116093B1 (de) 1976-05-21
GB1363918A (en) 1974-08-21
DE2139218C3 (de) 1974-12-19
ES394607A1 (es) 1975-04-01
DE2139218A1 (de) 1972-02-17
AU3202771A (en) 1973-02-08
NL7111061A (de) 1972-02-15
US3656180A (en) 1972-04-11
CA925967A (en) 1973-05-08
NL162523C (nl) 1980-05-16

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977
8339 Ceased/non-payment of the annual fee