GB1413312A - Supply current modulation device - Google Patents

Supply current modulation device

Info

Publication number
GB1413312A
GB1413312A GB4832272A GB4832272A GB1413312A GB 1413312 A GB1413312 A GB 1413312A GB 4832272 A GB4832272 A GB 4832272A GB 4832272 A GB4832272 A GB 4832272A GB 1413312 A GB1413312 A GB 1413312A
Authority
GB
United Kingdom
Prior art keywords
transistor
tone
diode
transformer
call
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
GB4832272A
Other languages
English (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.)
Alcatel CIT SA
Nokia Inc
Original Assignee
Compagnie Industrielle de Telecommunication CIT Alcatel SA
Nokia 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 Compagnie Industrielle de Telecommunication CIT Alcatel SA, Nokia Inc filed Critical Compagnie Industrielle de Telecommunication CIT Alcatel SA
Publication of GB1413312A publication Critical patent/GB1413312A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Devices For Supply Of Signal Current (AREA)
GB4832272A 1971-10-20 1972-10-20 Supply current modulation device Expired GB1413312A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7137681A FR2157159A5 (enrdf_load_stackoverflow) 1971-10-20 1971-10-20

Publications (1)

Publication Number Publication Date
GB1413312A true GB1413312A (en) 1975-11-12

Family

ID=9084647

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4832272A Expired GB1413312A (en) 1971-10-20 1972-10-20 Supply current modulation device

Country Status (8)

Country Link
BE (1) BE789970A (enrdf_load_stackoverflow)
CH (1) CH565488A5 (enrdf_load_stackoverflow)
DE (1) DE2250647A1 (enrdf_load_stackoverflow)
FR (1) FR2157159A5 (enrdf_load_stackoverflow)
GB (1) GB1413312A (enrdf_load_stackoverflow)
IT (1) IT969631B (enrdf_load_stackoverflow)
NL (1) NL7214189A (enrdf_load_stackoverflow)
SE (1) SE389251B (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
DE2250647A1 (de) 1973-04-26
IT969631B (it) 1974-04-10
SE389251B (sv) 1976-10-25
BE789970A (fr) 1973-04-12
FR2157159A5 (enrdf_load_stackoverflow) 1973-06-01
NL7214189A (enrdf_load_stackoverflow) 1973-04-25
CH565488A5 (enrdf_load_stackoverflow) 1975-08-15

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee