GB436407A - Improvements in or relating to piezo-electric oscillating crystals - Google Patents

Improvements in or relating to piezo-electric oscillating crystals

Info

Publication number
GB436407A
GB436407A GB20145/34A GB2014534A GB436407A GB 436407 A GB436407 A GB 436407A GB 20145/34 A GB20145/34 A GB 20145/34A GB 2014534 A GB2014534 A GB 2014534A GB 436407 A GB436407 A GB 436407A
Authority
GB
United Kingdom
Prior art keywords
piezo
temperature coefficient
electric
axis
relating
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
GB20145/34A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB436407A publication Critical patent/GB436407A/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
    • H03H9/02—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

Abstract

436,407. Piezo - - electric crystals. TELEFUNKEN GES. FUR DRATHLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. July 9, 1934, No. 20145. Convention date, July 21, 1933. [Class 40 (v)] A piezo - electric crystal of small thickness is cut so that its plane contains an axis Y, perpendicular to both the optic axis Z and the electric axis X, while its normal n makes an angle # with the optic axis Z such that a temperature coefficient of zero is obtained. The angle # is related to the temperature coefficient, Fig. 4 (not shown), and lies between 40 and 50‹ or 117 and 128‹ for zero temperature coefficient. The dimensions of the plate may be such that the oscillations determined by thickness are coupled with oscillations determined by other dimensions to modify the temperature coefficient.
GB20145/34A 1933-07-21 1934-07-09 Improvements in or relating to piezo-electric oscillating crystals Expired GB436407A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE436407X 1933-07-21

Publications (1)

Publication Number Publication Date
GB436407A true GB436407A (en) 1935-10-10

Family

ID=6506892

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20145/34A Expired GB436407A (en) 1933-07-21 1934-07-09 Improvements in or relating to piezo-electric oscillating crystals

Country Status (1)

Country Link
GB (1) GB436407A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2743144A (en) * 1951-04-07 1956-04-24 Motorola Inc Zero temperature coefficient piezoelectric crystal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2743144A (en) * 1951-04-07 1956-04-24 Motorola Inc Zero temperature coefficient piezoelectric crystal

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