FR1465926A - Threshold semiconductor device used in a telephone circuit to prevent direct current from passing through and extinguish sparks - Google Patents

Threshold semiconductor device used in a telephone circuit to prevent direct current from passing through and extinguish sparks

Info

Publication number
FR1465926A
FR1465926A FR47287A FR47287A FR1465926A FR 1465926 A FR1465926 A FR 1465926A FR 47287 A FR47287 A FR 47287A FR 47287 A FR47287 A FR 47287A FR 1465926 A FR1465926 A FR 1465926A
Authority
FR
France
Prior art keywords
passing
semiconductor device
direct current
device used
prevent direct
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
FR47287A
Other languages
French (fr)
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to FR47287A priority Critical patent/FR1465926A/en
Application granted granted Critical
Publication of FR1465926A publication Critical patent/FR1465926A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR47287A 1966-01-26 1966-01-26 Threshold semiconductor device used in a telephone circuit to prevent direct current from passing through and extinguish sparks Expired FR1465926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR47287A FR1465926A (en) 1966-01-26 1966-01-26 Threshold semiconductor device used in a telephone circuit to prevent direct current from passing through and extinguish sparks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR47287A FR1465926A (en) 1966-01-26 1966-01-26 Threshold semiconductor device used in a telephone circuit to prevent direct current from passing through and extinguish sparks

Publications (1)

Publication Number Publication Date
FR1465926A true FR1465926A (en) 1967-01-13

Family

ID=8599768

Family Applications (1)

Application Number Title Priority Date Filing Date
FR47287A Expired FR1465926A (en) 1966-01-26 1966-01-26 Threshold semiconductor device used in a telephone circuit to prevent direct current from passing through and extinguish sparks

Country Status (1)

Country Link
FR (1) FR1465926A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2371100A1 (en) * 1976-11-12 1978-06-09 Cselt Centro Studi Lab Telecom UNWANTED RING PULSES SUPPRESSION DEVICE FOR TELEPHONE DEVICES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2371100A1 (en) * 1976-11-12 1978-06-09 Cselt Centro Studi Lab Telecom UNWANTED RING PULSES SUPPRESSION DEVICE FOR TELEPHONE DEVICES

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