FR847865A - Appareils électro-mécaniques vibrants - Google Patents

Appareils électro-mécaniques vibrants

Info

Publication number
FR847865A
FR847865A FR847865DA FR847865A FR 847865 A FR847865 A FR 847865A FR 847865D A FR847865D A FR 847865DA FR 847865 A FR847865 A FR 847865A
Authority
FR
France
Prior art keywords
mechanical devices
vibrating
electro
vibrating electro
mechanical
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
English (en)
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR847865A publication Critical patent/FR847865A/fr
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
    • H03H9/02—Details
    • H03H9/02007—Details of bulk acoustic wave devices
    • H03H9/02015—Characteristics of piezoelectric layers, e.g. cutting angles
    • H03H9/02023—Characteristics of piezoelectric layers, e.g. cutting angles consisting of quartz

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
FR847865D 1937-12-21 1938-12-21 Appareils électro-mécaniques vibrants Expired FR847865A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US180937A US2227904A (en) 1937-12-21 1937-12-21 Piezoelectric crystal apparatus

Publications (1)

Publication Number Publication Date
FR847865A true FR847865A (fr) 1939-10-18

Family

ID=22662253

Family Applications (1)

Application Number Title Priority Date Filing Date
FR847865D Expired FR847865A (fr) 1937-12-21 1938-12-21 Appareils électro-mécaniques vibrants

Country Status (2)

Country Link
US (1) US2227904A (fr)
FR (1) FR847865A (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH607880B (fr) * 1976-01-16 Centre Electron Horloger Resonateur piezo-electrique.
US4317093A (en) * 1979-03-01 1982-02-23 Antonio Lungo Electric filter and method of manufacture
DE3703241C1 (de) * 1987-02-04 1988-07-14 Heraeus Gmbh W C Schwingquarz mit temperaturabhaengiger Resonanzfrequenz
JP2008245243A (ja) * 2007-02-26 2008-10-09 Epson Toyocom Corp 輪郭振動子、輪郭振動子の調整方法

Also Published As

Publication number Publication date
US2227904A (en) 1941-01-07

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