GB479979A - Piezo-electric crystal apparatus - Google Patents

Piezo-electric crystal apparatus

Info

Publication number
GB479979A
GB479979A GB4301/37A GB430137A GB479979A GB 479979 A GB479979 A GB 479979A GB 4301/37 A GB4301/37 A GB 4301/37A GB 430137 A GB430137 A GB 430137A GB 479979 A GB479979 A GB 479979A
Authority
GB
United Kingdom
Prior art keywords
crystal
harmonic
ratios
electrodes
piezo
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
GB4301/37A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB479979A publication Critical patent/GB479979A/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 elements; 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/0023—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns, or networks having balanced input and output
    • H03H9/0095—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns, or networks having balanced input and output 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 elements; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02007—Details of bulk acoustic wave devices
    • H03H9/02157—Dimensional parameters, e.g. ratio between two dimension parameters, length, width or thickness
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
    • H03H9/21—Crystal tuning forks
    • H03H9/215—Crystal tuning forks consisting of quartz
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; 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 elements; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
    • H03H9/56—Monolithic crystal filters

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)
GB4301/37A 1936-02-21 1937-02-12 Piezo-electric crystal apparatus Expired GB479979A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US65022A US2185599A (en) 1936-02-21 1936-02-21 Piezoelectric apparatus

Publications (1)

Publication Number Publication Date
GB479979A true GB479979A (en) 1938-02-15

Family

ID=22059823

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4301/37A Expired GB479979A (en) 1936-02-21 1937-02-12 Piezo-electric crystal apparatus

Country Status (6)

Country Link
US (1) US2185599A (en:Method)
BE (1) BE420034A (en:Method)
CH (1) CH202081A (en:Method)
FR (1) FR820481A (en:Method)
GB (1) GB479979A (en:Method)
NL (1) NL62574C (en:Method)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE759014C (de) * 1939-08-30 1953-03-23 Siemens & Halske A G Piezoelektrischer UEbertragerkristall
DE767884C (de) * 1941-04-03 1954-05-31 Telefunken Gmbh Filter, Phasendrehglied od. dgl. der elektrischen Nachrichtentechnik
DE763329C (de) * 1941-04-29 1954-10-18 Siemens & Halske A G Biegungsschwingungen ausfuehrender Quarzkristall
US2666196A (en) * 1949-06-07 1954-01-12 Bell Telephone Labor Inc Frequency station calling system using bifurcated piezoelectric elements
US2988728A (en) * 1953-07-06 1961-06-13 United Geophysical Corp Piezoelectric hydrophone
US2990525A (en) * 1957-12-12 1961-06-27 Bell Telephone Labor Inc Wave filter
US3582836A (en) * 1969-07-01 1971-06-01 Damon Eng Inc Monolithic crystal filters
JPS5851687B2 (ja) * 1976-10-22 1983-11-17 セイコーインスツルメンツ株式会社 音叉型水晶振動子
JPS55112017A (en) * 1979-02-20 1980-08-29 Seiko Epson Corp Electrode of tuning fork type crystal oscillator
EP0096653B1 (en) * 1982-06-04 1989-04-12 Statek Corparation Extensional mode piezoelectric microresonator
JP3858639B2 (ja) * 2000-08-31 2006-12-20 株式会社村田製作所 圧電共振子および電子機器

Also Published As

Publication number Publication date
BE420034A (en:Method)
CH202081A (de) 1938-12-31
NL62574C (en:Method)
US2185599A (en) 1940-01-02
FR820481A (fr) 1937-11-12

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