FR657760A - Improvements to electric filters - Google Patents

Improvements to electric filters

Info

Publication number
FR657760A
FR657760A FR657760DA FR657760A FR 657760 A FR657760 A FR 657760A FR 657760D A FR657760D A FR 657760DA FR 657760 A FR657760 A FR 657760A
Authority
FR
France
Prior art keywords
electric filters
filters
electric
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR657760A publication Critical patent/FR657760A/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)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
FR657760D 1927-07-19 1928-07-12 Improvements to electric filters Expired FR657760A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US294177XA 1927-07-19 1927-07-19

Publications (1)

Publication Number Publication Date
FR657760A true FR657760A (en) 1929-05-27

Family

ID=21848907

Family Applications (1)

Application Number Title Priority Date Filing Date
FR657760D Expired FR657760A (en) 1927-07-19 1928-07-12 Improvements to electric filters

Country Status (2)

Country Link
FR (1) FR657760A (en)
GB (1) GB294177A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL113891C (en) * 1955-05-09

Also Published As

Publication number Publication date
GB294177A (en) 1928-09-06

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