DE2115670A1 - - Google Patents

Info

Publication number
DE2115670A1
DE2115670A1 DE19712115670 DE2115670A DE2115670A1 DE 2115670 A1 DE2115670 A1 DE 2115670A1 DE 19712115670 DE19712115670 DE 19712115670 DE 2115670 A DE2115670 A DE 2115670A DE 2115670 A1 DE2115670 A1 DE 2115670A1
Authority
DE
Germany
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.)
Granted
Application number
DE19712115670
Other languages
German (de)
Other versions
DE2115670B2 (en
DE2115670C2 (en
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 filed Critical
Priority to DE19712115670 priority Critical patent/DE2115670C2/en
Priority to CH328772A priority patent/CH543202A/en
Priority to AT201772A priority patent/AT320039B/en
Priority to GB1172372A priority patent/GB1348476A/en
Priority to NL7203908A priority patent/NL7203908A/xx
Priority to IT2247672A priority patent/IT950824B/en
Priority to FR7211020A priority patent/FR2132175B1/fr
Priority to SE417572A priority patent/SE366449B/xx
Priority to LU65062D priority patent/LU65062A1/xx
Priority to BE781592A priority patent/BE781592A/en
Publication of DE2115670B2 publication Critical patent/DE2115670B2/en
Publication of DE2115670A1 publication Critical patent/DE2115670A1/de
Application granted granted Critical
Publication of DE2115670C2 publication Critical patent/DE2115670C2/en
Expired 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
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
    • H04M1/745—Protection devices or circuits for voltages surges on the line
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
DE19712115670 1971-03-31 1971-03-31 Circuit arrangement for telephone stations with surge-protected and polarity-independent microphone amplifiers in integrated monolithic technology Expired DE2115670C2 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
DE19712115670 DE2115670C2 (en) 1971-03-31 1971-03-31 Circuit arrangement for telephone stations with surge-protected and polarity-independent microphone amplifiers in integrated monolithic technology
CH328772A CH543202A (en) 1971-03-31 1972-03-07 Circuit arrangement in a telephone station, which arrangement has an overvoltage-protected and polarity-independent fed microphone amplifier in integrated monolithic technology
AT201772A AT320039B (en) 1971-03-31 1972-03-10 Circuit arrangement for telephone stations with surge-protected and polarity-independent microphone amplifiers in integrated monolithic technology
GB1172372A GB1348476A (en) 1971-03-31 1972-03-14 Telephone subscriberstation circuit arrangements
NL7203908A NL7203908A (en) 1971-03-31 1972-03-23
IT2247672A IT950824B (en) 1971-03-31 1972-03-28 CIRCUIT ARRANGEMENT TO PROTECT DEVICES SUPPLIED WITH DIRECT CURRENT THROUGH CONNECTION LINES IN TELE COMMUNICATIONS SYSTEMS ESPECIALLY IN TELEPHONE SYSTEMS
FR7211020A FR2132175B1 (en) 1971-03-31 1972-03-29
SE417572A SE366449B (en) 1971-03-31 1972-03-29
LU65062D LU65062A1 (en) 1971-03-31 1972-03-29
BE781592A BE781592A (en) 1971-03-31 1972-03-31 MOUNTING FOR THE PROTECTION OF DEVICES POWERED BY DIRECT CURRENT BY CONNECTION LINES, IN TELECOMMUNICATIONS INSTALLATIONS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712115670 DE2115670C2 (en) 1971-03-31 1971-03-31 Circuit arrangement for telephone stations with surge-protected and polarity-independent microphone amplifiers in integrated monolithic technology

Publications (3)

Publication Number Publication Date
DE2115670B2 DE2115670B2 (en) 1972-06-29
DE2115670A1 true DE2115670A1 (en) 1972-06-29
DE2115670C2 DE2115670C2 (en) 1981-06-04

Family

ID=5803435

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19712115670 Expired DE2115670C2 (en) 1971-03-31 1971-03-31 Circuit arrangement for telephone stations with surge-protected and polarity-independent microphone amplifiers in integrated monolithic technology

Country Status (2)

Country Link
AT (1) AT320039B (en)
DE (1) DE2115670C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2730378A1 (en) * 1976-07-07 1978-01-12 Ortho Pharma Corp METHOD OF ISOLATION OF UTERO-EVACUATING SUBSTANCES FROM PLANT EXTRACTS

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3538088C2 (en) * 1985-10-25 1993-11-11 Siemens Ag Circuit arrangement for surge protection in electronic telephone stations

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1815174B2 (en) * 1968-12-17 1970-10-29

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1815174B2 (en) * 1968-12-17 1970-10-29

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
DE-Z: Elektronik, 1959, Nr. 10, S. 319 *
DE-Z: Scientia Electrica, 1963, H. 6, S. 67 bis 91 *
INTERMETALL "Schaltbeispiele", Ausg. 1967, S. 3 *
INTERMETALL-Schaltung 10, Ausg. 1063/6 *
Rumpf, K.H.: Elektronik in der Fernsprechver- mittlungstechnik, 1956, S. 102 u. 103 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2730378A1 (en) * 1976-07-07 1978-01-12 Ortho Pharma Corp METHOD OF ISOLATION OF UTERO-EVACUATING SUBSTANCES FROM PLANT EXTRACTS

Also Published As

Publication number Publication date
DE2115670B2 (en) 1972-06-29
AT320039B (en) 1975-01-27
DE2115670C2 (en) 1981-06-04

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Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee