IT8421777A1 - CIRCUIT FOR ADAPTING THE OUTPUT IMPEDANCE OF A TELEPHONE DEVICE TO THE LINE - Google Patents

CIRCUIT FOR ADAPTING THE OUTPUT IMPEDANCE OF A TELEPHONE DEVICE TO THE LINE

Info

Publication number
IT8421777A1
IT8421777A1 IT1984A21777A IT2177784A IT8421777A1 IT 8421777 A1 IT8421777 A1 IT 8421777A1 IT 1984A21777 A IT1984A21777 A IT 1984A21777A IT 2177784 A IT2177784 A IT 2177784A IT 8421777 A1 IT8421777 A1 IT 8421777A1
Authority
IT
Italy
Prior art keywords
adapting
circuit
line
output impedance
telephone device
Prior art date
Application number
IT1984A21777A
Other languages
Italian (it)
Other versions
IT8421777A0 (en
IT1174568B (en
Original Assignee
Int Standard Electric Corporation
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 Corporation filed Critical Int Standard Electric Corporation
Publication of IT8421777A0 publication Critical patent/IT8421777A0/en
Publication of IT8421777A1 publication Critical patent/IT8421777A1/en
Application granted granted Critical
Publication of IT1174568B publication Critical patent/IT1174568B/en

Links

Classifications

    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Networks Using Active Elements (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephone Function (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Amplifiers (AREA)
IT21777/84A 1983-07-15 1984-07-06 CIRCUIT TO ADAPT THE OUTPUT IMPEDANCE OF A TELEPHONE TO THE LINE IT1174568B (en)

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 (en) 1984-07-06
IT8421777A1 true IT8421777A1 (en) 1986-01-06
IT1174568B IT1174568B (en) 1987-07-01

Family

ID=10545801

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21777/84A IT1174568B (en) 1983-07-15 1984-07-06 CIRCUIT TO ADAPT THE OUTPUT IMPEDANCE OF A TELEPHONE TO THE LINE

Country Status (7)

Country Link
JP (1) JPS6074732A (en)
KR (1) KR850005046A (en)
AU (1) AU3044284A (en)
ES (1) ES534300A0 (en)
FR (1) FR2549325A1 (en)
GB (1) GB2146505B (en)
IT (1) IT1174568B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6243944A (en) * 1985-08-21 1987-02-25 Toshiba Corp Telephone set circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1233955A (en) * 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
GB2146505B (en) 1987-04-15
GB2146505A (en) 1985-04-17
JPS6074732A (en) 1985-04-27
FR2549325A1 (en) 1985-01-18
AU3044284A (en) 1985-01-17
ES8601608A1 (en) 1985-10-16
GB8417828D0 (en) 1984-08-15
ES534300A0 (en) 1985-10-16
IT8421777A0 (en) 1984-07-06
IT1174568B (en) 1987-07-01
KR850005046A (en) 1985-08-19

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