IT1174568B - Circuito per adattare l'impedenza di uscita di un apparecchio telefonico alla linea - Google Patents

Circuito per adattare l'impedenza di uscita di un apparecchio telefonico alla linea

Info

Publication number
IT1174568B
IT1174568B IT21777/84A IT2177784A IT1174568B IT 1174568 B IT1174568 B IT 1174568B IT 21777/84 A IT21777/84 A IT 21777/84A IT 2177784 A IT2177784 A IT 2177784A IT 1174568 B IT1174568 B IT 1174568B
Authority
IT
Italy
Prior art keywords
adapt
telephone
circuit
line
output impedance
Prior art date
Application number
IT21777/84A
Other languages
English (en)
Other versions
IT8421777A1 (it
IT8421777A0 (it
Inventor
Peter Fred Blomley
Edward John Wemyss Whittaker
Original Assignee
Int Standard Electric Corp
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 claimed from GB08319222A external-priority patent/GB2154831B/en
Application filed by Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of IT8421777A0 publication Critical patent/IT8421777A0/it
Publication of IT8421777A1 publication Critical patent/IT8421777A1/it
Application granted granted Critical
Publication of IT1174568B publication Critical patent/IT1174568B/it

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
    • H03H11/28—Impedance matching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/76—Compensating for differences in line impedance

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Networks Using Active Elements (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Function (AREA)
  • Amplifiers (AREA)
IT21777/84A 1983-07-15 1984-07-06 Circuito per adattare l'impedenza di uscita di un apparecchio telefonico alla linea IT1174568B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08319222A GB2154831B (en) 1983-06-29 1983-07-15 Impedance matching circuit

Publications (3)

Publication Number Publication Date
IT8421777A0 IT8421777A0 (it) 1984-07-06
IT8421777A1 IT8421777A1 (it) 1986-01-06
IT1174568B true IT1174568B (it) 1987-07-01

Family

ID=10545801

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21777/84A IT1174568B (it) 1983-07-15 1984-07-06 Circuito per adattare l'impedenza di uscita di un apparecchio telefonico alla linea

Country Status (7)

Country Link
JP (1) JPS6074732A (it)
KR (1) KR850005046A (it)
AU (1) AU3044284A (it)
ES (1) ES8601608A1 (it)
FR (1) FR2549325A1 (it)
GB (1) GB2146505B (it)
IT (1) IT1174568B (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6243944A (ja) * 1985-08-21 1987-02-25 Toshiba Corp 電話機回路

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1233955A (it) * 1967-10-23 1971-06-03
JPS5679551A (en) * 1979-12-04 1981-06-30 Hitachi Ltd Bus line termination system

Also Published As

Publication number Publication date
ES534300A0 (es) 1985-10-16
FR2549325A1 (fr) 1985-01-18
IT8421777A1 (it) 1986-01-06
GB2146505B (en) 1987-04-15
GB8417828D0 (en) 1984-08-15
ES8601608A1 (es) 1985-10-16
GB2146505A (en) 1985-04-17
IT8421777A0 (it) 1984-07-06
JPS6074732A (ja) 1985-04-27
AU3044284A (en) 1985-01-17
KR850005046A (ko) 1985-08-19

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