ES394607A1 - Crystal filter - Google Patents

Crystal filter

Info

Publication number
ES394607A1
ES394607A1 ES394607A ES394607A ES394607A1 ES 394607 A1 ES394607 A1 ES 394607A1 ES 394607 A ES394607 A ES 394607A ES 394607 A ES394607 A ES 394607A ES 394607 A1 ES394607 A1 ES 394607A1
Authority
ES
Spain
Prior art keywords
input
resonator
crystal filter
filter
nongrounded
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
Application number
ES394607A
Other languages
Spanish (es)
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 ES394607A1 publication Critical patent/ES394607A1/en
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)

Abstract

In a monolithic crystal filter which employs a combination of mass loading and acoustic coupling, a secondary mechanical wave generating resonator with short-circuited, nongrounded electrodes is employed between the input and output resonators. The input wave is applied to the intermediate resonator as well as to the input resonator, resulting in sharp peaks of attenuation which bracket the passband of the filter.
ES394607A 1970-08-12 1971-08-10 Crystal filter Expired ES394607A1 (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
ES394607A1 true ES394607A1 (en) 1975-04-01

Family

ID=22047661

Family Applications (1)

Application Number Title Priority Date Filing Date
ES394607A Expired ES394607A1 (en) 1970-08-12 1971-08-10 Crystal filter

Country Status (10)

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

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 (en) * 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 (en) * 1963-12-12 1966-03-11 Commissariat Energie Atomique Magnetic resonance magnetometer
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
CA925967A (en) 1973-05-08
SE361800B (en) 1973-11-12
NL7111061A (en) 1972-02-15
GB1363918A (en) 1974-08-21
DE2139218A1 (en) 1972-02-17
US3656180A (en) 1972-04-11
AU3202771A (en) 1973-02-08
JPS5116093B1 (en) 1976-05-21
BE771051A (en) 1971-12-16
DE2139218C3 (en) 1974-12-19
FR2104192A5 (en) 1972-04-14
NL162523B (en) 1979-12-17
NL162523C (en) 1980-05-16
DE2139218B2 (en) 1974-05-09

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