GB2037128B - Electronic telephone on a chip - Google Patents

Electronic telephone on a chip

Info

Publication number
GB2037128B
GB2037128B GB7937938A GB7937938A GB2037128B GB 2037128 B GB2037128 B GB 2037128B GB 7937938 A GB7937938 A GB 7937938A GB 7937938 A GB7937938 A GB 7937938A GB 2037128 B GB2037128 B GB 2037128B
Authority
GB
United Kingdom
Prior art keywords
chip
electronic telephone
telephone
electronic
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
GB7937938A
Other versions
GB2037128A (en
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.)
Texas Instruments Inc
Original Assignee
Texas Instruments Inc
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 Texas Instruments Inc filed Critical Texas Instruments Inc
Publication of GB2037128A publication Critical patent/GB2037128A/en
Application granted granted Critical
Publication of GB2037128B publication Critical patent/GB2037128B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
    • 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
GB7937938A 1978-11-20 1979-11-01 Electronic telephone on a chip Expired GB2037128B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US96254878A 1978-11-20 1978-11-20

Publications (2)

Publication Number Publication Date
GB2037128A GB2037128A (en) 1980-07-02
GB2037128B true GB2037128B (en) 1983-04-13

Family

ID=25506049

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7937938A Expired GB2037128B (en) 1978-11-20 1979-11-01 Electronic telephone on a chip

Country Status (4)

Country Link
JP (1) JPS5574254A (en)
DE (1) DE2946815A1 (en)
GB (1) GB2037128B (en)
HK (1) HK30288A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8103419A (en) * 1981-04-01 1982-11-01 Philips Nv LINE TEST CIRCUIT FOR A SUBSCRIBER PHONE.
FR2532133A1 (en) * 1982-08-17 1984-02-24 Labo Cent Telecommunicat CIRCUIT OF RINGER FOR TELEPHONE STATION, REALIZABLE IN INTEGRATED CIRCUIT
EP0134867B1 (en) * 1983-08-18 1987-03-18 Itt Industries, Inc. Telephone ringing circuit realisable as an integrated circuit
CH668521A5 (en) * 1983-10-18 1988-12-30 Siemens Ag Albis CIRCUIT ARRANGEMENT FOR A TELEPHONE.
DE3504243A1 (en) * 1985-02-08 1986-08-14 Philips Patentverwaltung Gmbh, 2000 Hamburg METHOD AND CIRCUIT ARRANGEMENT FOR GENERATING AN ACOUSTIC CALL SIGNAL IN SUBSCRIBER TERMINALS OF TELECOMMUNICATION SYSTEMS

Also Published As

Publication number Publication date
DE2946815A1 (en) 1980-05-29
JPS5574254A (en) 1980-06-04
GB2037128A (en) 1980-07-02
HK30288A (en) 1988-05-06

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 19991031