CH543202A - Circuit arrangement in a telephone station, which arrangement has an overvoltage-protected and polarity-independent fed microphone amplifier in integrated monolithic technology - Google Patents

Circuit arrangement in a telephone station, which arrangement has an overvoltage-protected and polarity-independent fed microphone amplifier in integrated monolithic technology

Info

Publication number
CH543202A
CH543202A CH328772A CH328772A CH543202A CH 543202 A CH543202 A CH 543202A CH 328772 A CH328772 A CH 328772A CH 328772 A CH328772 A CH 328772A CH 543202 A CH543202 A CH 543202A
Authority
CH
Switzerland
Prior art keywords
arrangement
overvoltage
polarity
protected
telephone station
Prior art date
Application number
CH328772A
Other languages
German (de)
Inventor
Erwin Dipl Ing Martin
Wolfgang Dipl Phys Boehme
Original Assignee
Siemens Ag
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 DE19712115670 external-priority patent/DE2115670C2/en
Priority claimed from DE19712115757 external-priority patent/DE2115757B2/en
Application filed by Siemens Ag filed Critical Siemens Ag
Publication of CH543202A publication Critical patent/CH543202A/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
    • H04M1/74—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)
  • Emergency Protection Circuit Devices (AREA)
CH328772A 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 CH543202A (en)

Applications Claiming Priority (2)

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
DE19712115757 DE2115757B2 (en) 1971-03-31 1971-03-31 CIRCUIT ARRANGEMENT FOR THE PROTECTION OF CONNECTING CABLES WITH DC SUPPLIED EQUIPMENT IN REMOTE INDICATORS, IN PARTICULAR TELEPHONE SYSTEMS

Publications (1)

Publication Number Publication Date
CH543202A true CH543202A (en) 1973-10-15

Family

ID=25760899

Family Applications (1)

Application Number Title Priority Date Filing Date
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

Country Status (8)

Country Link
BE (1) BE781592A (en)
CH (1) CH543202A (en)
FR (1) FR2132175B1 (en)
GB (1) GB1348476A (en)
IT (1) IT950824B (en)
LU (1) LU65062A1 (en)
NL (1) NL7203908A (en)
SE (1) SE366449B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01502953A (en) * 1986-04-30 1989-10-05 スタンダード・テレフオンズ・アンド・ケーブルズ・ピー・テイ・ワイ・リミテッド phone protection circuit

Also Published As

Publication number Publication date
FR2132175A1 (en) 1972-11-17
SE366449B (en) 1974-04-22
NL7203908A (en) 1972-10-03
BE781592A (en) 1972-10-02
FR2132175B1 (en) 1973-06-29
LU65062A1 (en) 1972-07-11
IT950824B (en) 1973-06-20
GB1348476A (en) 1974-03-20

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Legal Events

Date Code Title Description
PL Patent ceased