GB292144A - Filter for preventing distortion of telephone currents - Google Patents

Filter for preventing distortion of telephone currents

Info

Publication number
GB292144A
GB292144A GB16733/28A GB1673328A GB292144A GB 292144 A GB292144 A GB 292144A GB 16733/28 A GB16733/28 A GB 16733/28A GB 1673328 A GB1673328 A GB 1673328A GB 292144 A GB292144 A GB 292144A
Authority
GB
United Kingdom
Prior art keywords
filter
condenser
telephone
resistance
preventing distortion
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
GB16733/28A
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.)
TELEPHONES GRAMMONT SOC D
Original Assignee
TELEPHONES GRAMMONT SOC D
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 TELEPHONES GRAMMONT SOC D filed Critical TELEPHONES GRAMMONT SOC D
Publication of GB292144A publication Critical patent/GB292144A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks

Landscapes

  • Filters And Equalizers (AREA)
  • Networks Using Active Elements (AREA)

Abstract

292,144. Soc. des Telephones Grammont. June 15, 1927, [Convention date]- Addition to 287,847. Attenuation cqualizers and similar impedance ' networks.-As in the parent Specification. a filter for equalizing telephone current components comprises coupled coils 4 - - 7 connected to a telephone circuit at 2, 3, to a condenser 8, and to a further condenser 10 associated with a resistance 9. According to the present invention the resistance 9 and condenser 10 are in series instead of in parallel. A modification in which the coils are connected asymmetrically is described (Fig. 2, not shown). Several sections may be connected in series, and the system may be resonant.
GB16733/28A 1927-06-15 1928-06-08 Filter for preventing distortion of telephone currents Expired GB292144A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR292144X 1927-06-15

Publications (1)

Publication Number Publication Date
GB292144A true GB292144A (en) 1929-06-06

Family

ID=8887813

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16733/28A Expired GB292144A (en) 1927-06-15 1928-06-08 Filter for preventing distortion of telephone currents

Country Status (1)

Country Link
GB (1) GB292144A (en)

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