FR866344A - Improvements to electrical filtering circuits - Google Patents

Improvements to electrical filtering circuits

Info

Publication number
FR866344A
FR866344A FR866344DA FR866344A FR 866344 A FR866344 A FR 866344A FR 866344D A FR866344D A FR 866344DA FR 866344 A FR866344 A FR 866344A
Authority
FR
France
Prior art keywords
filtering circuits
electrical filtering
electrical
circuits
filtering
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
French (fr)
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Application granted granted Critical
Publication of FR866344A publication Critical patent/FR866344A/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
    • H03H9/545—Filters comprising resonators of piezoelectric or electrostrictive material including active elements

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Filters And Equalizers (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
FR866344D 1939-12-13 1940-07-09 Improvements to electrical filtering circuits Expired FR866344A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB32162/39A GB538946A (en) 1939-12-13 1939-12-13 Improvements in electric filter circuits

Publications (1)

Publication Number Publication Date
FR866344A true FR866344A (en) 1941-07-28

Family

ID=10334256

Family Applications (1)

Application Number Title Priority Date Filing Date
FR866344D Expired FR866344A (en) 1939-12-13 1940-07-09 Improvements to electrical filtering circuits

Country Status (3)

Country Link
US (1) US2308397A (en)
FR (1) FR866344A (en)
GB (1) GB538946A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2524781A (en) * 1945-06-18 1950-10-10 Standard Telephones Cables Ltd Filter
US2459019A (en) * 1946-12-27 1949-01-11 Bell Telephone Labor Inc Piezoelectric crystal filter
US2886787A (en) * 1953-07-30 1959-05-12 Donald E Johnson Piezoelectric device
DE1234276B (en) * 1954-06-29 1967-02-16 Gen Electric Piezoelectric transformation arrangement with an oscillating body made of pre-polarized ferroelectric material
NL283486A (en) * 1961-09-22

Also Published As

Publication number Publication date
US2308397A (en) 1943-01-12
GB538946A (en) 1941-08-22

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