GB1196845A - Improvements in or relating to Monolithic Crystal Filters. - Google Patents

Improvements in or relating to Monolithic Crystal Filters.

Info

Publication number
GB1196845A
GB1196845A GB2645268A GB2645268A GB1196845A GB 1196845 A GB1196845 A GB 1196845A GB 2645268 A GB2645268 A GB 2645268A GB 2645268 A GB2645268 A GB 2645268A GB 1196845 A GB1196845 A GB 1196845A
Authority
GB
United Kingdom
Prior art keywords
monolithic crystal
june
gold
relating
base
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
GB2645268A
Inventor
John Francis Werner
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.)
General Electric Co PLC
Original Assignee
General Electric Co 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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB2645268A priority Critical patent/GB1196845A/en
Publication of GB1196845A publication Critical patent/GB1196845A/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
    • H03H9/46—Filters
    • H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
    • H03H9/56—Monolithic crystal filters
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

1,196,845. Piezoelectric elements. GENERAL ELECTRIC & ENGLISH ELECTRIC COMPANIES Ltd. 4 June, 1969 [4 June, 1968], No. 26452/68. Heading H1E. [Also in Division H3] A monolithic crystal filter is similar to that disclosed in Specification 1,195,929 except that the two electrodes forming each intermediate resonator are not connected by a variable capacitor but are connected by a short-circuit connection. Accordingly, the filter is manufactured by a method which consists in measuring the resonant frequency of each of the resonators and carefully building up the electrodes to the required thickness to obtain the desired frequency characteristic. Each electrode comprises a base of gold which is evaporated on to the quartz slab and gold or nickel is electrodeposited on to this base to obtain the required thickness.
GB2645268A 1968-06-04 1968-06-04 Improvements in or relating to Monolithic Crystal Filters. Expired GB1196845A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2645268A GB1196845A (en) 1968-06-04 1968-06-04 Improvements in or relating to Monolithic Crystal Filters.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2645268A GB1196845A (en) 1968-06-04 1968-06-04 Improvements in or relating to Monolithic Crystal Filters.

Publications (1)

Publication Number Publication Date
GB1196845A true GB1196845A (en) 1970-07-01

Family

ID=10243845

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2645268A Expired GB1196845A (en) 1968-06-04 1968-06-04 Improvements in or relating to Monolithic Crystal Filters.

Country Status (1)

Country Link
GB (1) GB1196845A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484158A (en) * 1982-07-07 1984-11-20 General Electric Company Monolithic crystal filter and method of manufacturing same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484158A (en) * 1982-07-07 1984-11-20 General Electric Company Monolithic crystal filter and method of manufacturing same

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees