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FR2350014A1 - EQUALIZED TRANSMISSION TELEPHONE CIRCUIT - Google Patents

EQUALIZED TRANSMISSION TELEPHONE CIRCUIT

Info

Publication number
FR2350014A1
FR2350014A1 FR7712534A FR7712534A FR2350014A1 FR 2350014 A1 FR2350014 A1 FR 2350014A1 FR 7712534 A FR7712534 A FR 7712534A FR 7712534 A FR7712534 A FR 7712534A FR 2350014 A1 FR2350014 A1 FR 2350014A1
Authority
FR
France
Prior art keywords
telephone circuit
transmission telephone
equalized transmission
equalized
circuit
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.)
Withdrawn
Application number
FR7712534A
Other languages
French (fr)
Inventor
Lucas Achiel Leonie Poppe
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.)
International Standard Electric Corp
Original Assignee
International 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
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of FR2350014A1 publication Critical patent/FR2350014A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6008—Substation equipment, e.g. for use by subscribers including speech amplifiers in the transmitter circuit
    • 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)
  • Amplifiers (AREA)
  • Devices For Supply Of Signal Current (AREA)
FR7712534A 1976-04-26 1977-04-26 EQUALIZED TRANSMISSION TELEPHONE CIRCUIT Withdrawn FR2350014A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE2054973A BE841105A (en) 1976-04-26 1976-04-26 TELECOMMUNICATION DEVICE

Publications (1)

Publication Number Publication Date
FR2350014A1 true FR2350014A1 (en) 1977-11-25

Family

ID=3865331

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7712534A Withdrawn FR2350014A1 (en) 1976-04-26 1977-04-26 EQUALIZED TRANSMISSION TELEPHONE CIRCUIT

Country Status (6)

Country Link
AU (1) AU507967B2 (en)
BE (1) BE841105A (en)
DE (1) DE2718009A1 (en)
FR (1) FR2350014A1 (en)
GB (1) GB1531692A (en)
ZA (1) ZA771950B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2373200A1 (en) * 1976-12-03 1978-06-30 Cselt Centro Studi Lab Telecom CIRCUIT FOR RECEIVING AND SENDING SIGNALS IN A SUBSCRIBER'S TELEPHONE DEVICE
FR2575625A1 (en) * 1984-12-27 1986-07-04 Thomson Csf SUBSCRIBER PHONE WITH AMPLIFIED LISTENING SPEAKER WITH REDUCTION OF GAIN IN CASE OF INSUFFICIENT POWER SUPPLY

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2126046A (en) * 1982-08-25 1984-03-14 Philips Electronic Associated Telephone circuit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2818470A (en) * 1956-03-29 1957-12-31 Bell Telephone Labor Inc Compensated transistor circuit
DE1762058A1 (en) * 1968-03-29 1970-04-09 Siemens Ag Circuit arrangement for centrally fed subscriber stations with speech circuits containing a resistance bridge
US3546395A (en) * 1968-01-15 1970-12-08 Bell Telephone Labor Inc Active telephone set speech network employing transistor feedback loop for sidetone balance and equalization
BE792329A (en) * 1971-12-09 1973-06-06 Int Standard Electric Corp ELECTRONIC TRANSMISSION CIRCUIT FOR TELEPHONE STATION
US3748399A (en) * 1970-07-23 1973-07-24 Nippon Telegraph & Telephone Telephone non-coil hybrid circuits utilizing active elements

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2818470A (en) * 1956-03-29 1957-12-31 Bell Telephone Labor Inc Compensated transistor circuit
US3546395A (en) * 1968-01-15 1970-12-08 Bell Telephone Labor Inc Active telephone set speech network employing transistor feedback loop for sidetone balance and equalization
FR1604184A (en) * 1968-01-15 1971-07-26
DE1762058A1 (en) * 1968-03-29 1970-04-09 Siemens Ag Circuit arrangement for centrally fed subscriber stations with speech circuits containing a resistance bridge
US3748399A (en) * 1970-07-23 1973-07-24 Nippon Telegraph & Telephone Telephone non-coil hybrid circuits utilizing active elements
BE792329A (en) * 1971-12-09 1973-06-06 Int Standard Electric Corp ELECTRONIC TRANSMISSION CIRCUIT FOR TELEPHONE STATION
FR2164377A5 (en) * 1971-12-09 1973-07-27 Int Standard Electric Corp
US3823272A (en) * 1971-12-09 1974-07-09 Int Standard Electric Corp Electronic telephone transmission circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2373200A1 (en) * 1976-12-03 1978-06-30 Cselt Centro Studi Lab Telecom CIRCUIT FOR RECEIVING AND SENDING SIGNALS IN A SUBSCRIBER'S TELEPHONE DEVICE
FR2575625A1 (en) * 1984-12-27 1986-07-04 Thomson Csf SUBSCRIBER PHONE WITH AMPLIFIED LISTENING SPEAKER WITH REDUCTION OF GAIN IN CASE OF INSUFFICIENT POWER SUPPLY
EP0189711A1 (en) * 1984-12-27 1986-08-06 Thomson-Csf Telephone apparatus with loudspeaker for amplified listening with reduction of gain in case of insufficient current supply
US4750203A (en) * 1984-12-27 1988-06-07 Thomson-Csf Subscriber telephone set with amplified loudspeaker reception with reduction of gain in the case of an insufficient power supply

Also Published As

Publication number Publication date
ZA771950B (en) 1978-04-26
BE841105A (en) 1976-10-26
AU507967B2 (en) 1980-03-06
DE2718009A1 (en) 1977-11-10
GB1531692A (en) 1978-11-08
AU2453677A (en) 1978-10-26

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Legal Events

Date Code Title Description
ST Notification of lapse