FR992526A - Quartz piézoélectrique à fréquence variable - Google Patents

Quartz piézoélectrique à fréquence variable

Info

Publication number
FR992526A
FR992526A FR992526DA FR992526A FR 992526 A FR992526 A FR 992526A FR 992526D A FR992526D A FR 992526DA FR 992526 A FR992526 A FR 992526A
Authority
FR
France
Prior art keywords
variable frequency
piezoelectric quartz
frequency piezoelectric
quartz
variable
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.)
Societe Francaise Radio Electrique
Original Assignee
Societe Francaise Radio Electrique
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 Societe Francaise Radio Electrique filed Critical Societe Francaise Radio Electrique
Application granted granted Critical
Publication of FR992526A publication Critical patent/FR992526A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
    • H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
    • H03H3/02—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks
    • H03H3/04—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks for obtaining desired frequency or temperature coefficient
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
    • H03B5/34—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being vacuum tube

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
FR992526D 1944-06-28 1944-06-28 Quartz piézoélectrique à fréquence variable Expired FR992526A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR992526T 1944-06-28

Publications (1)

Publication Number Publication Date
FR992526A true FR992526A (fr) 1951-10-19

Family

ID=9554868

Family Applications (1)

Application Number Title Priority Date Filing Date
FR992526D Expired FR992526A (fr) 1944-06-28 1944-06-28 Quartz piézoélectrique à fréquence variable

Country Status (4)

Country Link
BE (1) BE459654A (fr)
ES (1) ES172693A1 (fr)
FR (1) FR992526A (fr)
LU (1) LU27897A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0706835A1 (fr) * 1994-10-10 1996-04-17 Endress + Hauser GmbH + Co. Méthode de mise en oeuvre d'un transducteur ultrasonique, piezoélectrique et circuit destiné à sa mise en application

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0706835A1 (fr) * 1994-10-10 1996-04-17 Endress + Hauser GmbH + Co. Méthode de mise en oeuvre d'un transducteur ultrasonique, piezoélectrique et circuit destiné à sa mise en application
US5757104A (en) * 1994-10-10 1998-05-26 Endress + Hauser Gmbh + Co. Method of operating an ultransonic piezoelectric transducer and circuit arrangement for performing the method

Also Published As

Publication number Publication date
LU27897A1 (fr) 1946-04-11
BE459654A (fr) 1945-09-29
ES172693A1 (es) 1946-04-01

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