FR867808A - Piezoelectric crystal filters - Google Patents

Piezoelectric crystal filters

Info

Publication number
FR867808A
FR867808A FR867808DA FR867808A FR 867808 A FR867808 A FR 867808A FR 867808D A FR867808D A FR 867808DA FR 867808 A FR867808 A FR 867808A
Authority
FR
France
Prior art keywords
piezoelectric crystal
crystal filters
filters
piezoelectric
crystal
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
Other languages
French (fr)
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.)
Lignes Telegraphiques et Telephoniques LTT SA
Original Assignee
Lignes Telegraphiques et Telephoniques LTT SA
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 Lignes Telegraphiques et Telephoniques LTT SA filed Critical Lignes Telegraphiques et Telephoniques LTT SA
Application granted granted Critical
Publication of FR867808A publication Critical patent/FR867808A/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
    • H03H9/0023—Balance-unbalance or balance-balance networks
    • H03H9/0095—Balance-unbalance or balance-balance networks using bulk acoustic wave devices
    • 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
    • H03H9/542—Filters comprising resonators of piezoelectric or electrostrictive material including passive elements
    • 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
    • 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
    • H03H9/58—Multiple crystal filters
    • H03H9/60—Electric coupling means therefor

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
FR867808D 1939-11-10 1940-11-27 Piezoelectric crystal filters Expired FR867808A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US303757A US2271870A (en) 1939-11-10 1939-11-10 Wave transmission network

Publications (1)

Publication Number Publication Date
FR867808A true FR867808A (en) 1941-11-29

Family

ID=23173554

Family Applications (1)

Application Number Title Priority Date Filing Date
FR867808D Expired FR867808A (en) 1939-11-10 1940-11-27 Piezoelectric crystal filters

Country Status (3)

Country Link
US (1) US2271870A (en)
FR (1) FR867808A (en)
GB (1) GB542452A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2886787A (en) * 1953-07-30 1959-05-12 Donald E Johnson Piezoelectric device
US3007121A (en) * 1959-02-05 1961-10-31 Allen Bradley Co Deresonated capacitor
US3047823A (en) * 1959-05-07 1962-07-31 Panoramic Radio Products Inc Tunable piezo-electric crystal
US3297968A (en) * 1962-03-28 1967-01-10 Vibrasonics Inc Piezoelectric ceramic transformer
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
US3408515A (en) * 1964-10-08 1968-10-29 Bell Telephone Labor Inc Second overtone dt-cut quartz resonator
US3487318A (en) * 1967-11-08 1969-12-30 Motorola Inc Mode coupled discriminator
BE758421A (en) * 1969-11-06 1971-05-04 Automatic Elect Lab POLYLITHIC CRYSTAL BAND-PASS FILTER WITH MITIGATION POLAR FREQUENCIES IN THE LOWER STOP BAND
US3686592A (en) * 1970-10-08 1972-08-22 Us Army Monolithic coupled crystal resonator filter having cross impedance adjusting means
US4224586A (en) * 1978-10-10 1980-09-23 Motorola, Inc. Monolithic crystal filter having a passband symmetrical about a center frequency
US4392074A (en) * 1980-09-19 1983-07-05 Siemens Aktiengesellschaft Trigger device and piezo-ignition coupler with galvanic decoupling
US4365182A (en) * 1980-10-14 1982-12-21 The United States Of America As Represented By The Secretary Of The Army Method of fabricating acceleration resistant crystal resonators and acceleration resistant crystal resonators so formed
US4929860A (en) * 1988-05-17 1990-05-29 Sundstrand Data Control, Inc. Electrode configuration for vibrating beam transducers
JP4513860B2 (en) * 2005-04-13 2010-07-28 株式会社村田製作所 Piezoelectric thin film filter
CN110011638A (en) 2017-12-07 2019-07-12 英飞凌科技股份有限公司 Acoustical coupling resonator trap and bandpass filter

Also Published As

Publication number Publication date
US2271870A (en) 1942-02-03
GB542452A (en) 1942-01-09

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