GB973163A - Improvements in or relating to crystal filters - Google Patents

Improvements in or relating to crystal filters

Info

Publication number
GB973163A
GB973163A GB31047/61A GB3104761A GB973163A GB 973163 A GB973163 A GB 973163A GB 31047/61 A GB31047/61 A GB 31047/61A GB 3104761 A GB3104761 A GB 3104761A GB 973163 A GB973163 A GB 973163A
Authority
GB
United Kingdom
Prior art keywords
crystals
virtual
amplifier
crystal
earth
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
GB31047/61A
Other languages
English (en)
Inventor
Alan Sydney Chester
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.)
SECR AVIATION
Minister of Aviation
Original Assignee
SECR AVIATION
Minister of Aviation
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
Priority to BE621743D priority Critical patent/BE621743A/xx
Priority to NL282567D priority patent/NL282567A/xx
Application filed by SECR AVIATION, Minister of Aviation filed Critical SECR AVIATION
Priority to GB31047/61A priority patent/GB973163A/en
Priority to US217364A priority patent/US3221265A/en
Priority to DEM54020A priority patent/DE1255827B/de
Priority to FR908011A priority patent/FR1337534A/fr
Priority to CH1025562A priority patent/CH404819A/fr
Publication of GB973163A publication Critical patent/GB973163A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/1208—Frequency selective two-port networks using amplifiers with feedback comprising an electromechanical resonator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/1213—Frequency selective two-port networks using amplifiers with feedback using transistor amplifiers

Landscapes

  • Networks Using Active Elements (AREA)
  • Design And Manufacture Of Integrated Circuits (AREA)
  • Amplifiers (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
GB31047/61A 1961-08-29 1961-08-29 Improvements in or relating to crystal filters Expired GB973163A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
BE621743D BE621743A (en:Method) 1961-08-29
NL282567D NL282567A (en:Method) 1961-08-29
GB31047/61A GB973163A (en) 1961-08-29 1961-08-29 Improvements in or relating to crystal filters
US217364A US3221265A (en) 1961-08-29 1962-08-16 Crystal filter circuits
DEM54020A DE1255827B (de) 1961-08-29 1962-08-24 Kristallfilter
FR908011A FR1337534A (fr) 1961-08-29 1962-08-28 Filtres à cristal
CH1025562A CH404819A (fr) 1961-08-29 1962-08-29 Filtre à cristal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31047/61A GB973163A (en) 1961-08-29 1961-08-29 Improvements in or relating to crystal filters

Publications (1)

Publication Number Publication Date
GB973163A true GB973163A (en) 1964-10-21

Family

ID=10317164

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31047/61A Expired GB973163A (en) 1961-08-29 1961-08-29 Improvements in or relating to crystal filters

Country Status (6)

Country Link
US (1) US3221265A (en:Method)
BE (1) BE621743A (en:Method)
CH (1) CH404819A (en:Method)
DE (1) DE1255827B (en:Method)
GB (1) GB973163A (en:Method)
NL (1) NL282567A (en:Method)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2164813A (en) * 1984-09-21 1986-03-26 Sharp Kk Noise filter for an electric apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2433367B (en) * 2005-12-03 2010-11-10 Peter John Jones Filter using tuning fork crystals

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE709817C (de) * 1936-11-20 1941-08-27 Telefunken Gmbh Kristallfilter veraenderbarer Bandbreite
GB509040A (en) * 1937-10-06 1939-07-06 James Robinson Improvements in electrical frequency selective circuits
US2510868A (en) * 1945-12-14 1950-06-06 Press Wireless Inc Wave transmission filter circuits
US2910657A (en) * 1955-02-18 1959-10-27 Gen Electric Crystal filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2164813A (en) * 1984-09-21 1986-03-26 Sharp Kk Noise filter for an electric apparatus

Also Published As

Publication number Publication date
BE621743A (en:Method)
CH404819A (fr) 1965-12-31
DE1255827B (de) 1967-12-07
US3221265A (en) 1965-11-30
NL282567A (en:Method)

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