GB912755A - Improvements in or relating to circuit arrangements for automatic signalling systems - Google Patents

Improvements in or relating to circuit arrangements for automatic signalling systems

Info

Publication number
GB912755A
GB912755A GB34006/59A GB3400659A GB912755A GB 912755 A GB912755 A GB 912755A GB 34006/59 A GB34006/59 A GB 34006/59A GB 3400659 A GB3400659 A GB 3400659A GB 912755 A GB912755 A GB 912755A
Authority
GB
United Kingdom
Prior art keywords
transistor
circuits
tone
series
base
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
GB34006/59A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB912755A publication Critical patent/GB912755A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
    • H04Q3/521—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using semiconductors in the switching stages
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Amplifiers (AREA)
  • Devices For Supply Of Signal Current (AREA)
GB34006/59A 1958-10-10 1959-10-07 Improvements in or relating to circuit arrangements for automatic signalling systems Expired GB912755A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL232178 1958-10-10

Publications (1)

Publication Number Publication Date
GB912755A true GB912755A (en) 1962-12-12

Family

ID=19751383

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34006/59A Expired GB912755A (en) 1958-10-10 1959-10-07 Improvements in or relating to circuit arrangements for automatic signalling systems

Country Status (6)

Country Link
JP (1) JPS3623516B1 (enrdf_load_stackoverflow)
CH (1) CH375046A (enrdf_load_stackoverflow)
DE (1) DE1146925B (enrdf_load_stackoverflow)
FR (1) FR1237437A (enrdf_load_stackoverflow)
GB (1) GB912755A (enrdf_load_stackoverflow)
NL (2) NL104005C (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1194917B (de) * 1963-09-25 1965-06-16 Merk Ag Telefonbau Friedrich Schaltungsanordnung fuer Fernsprech-vermittlungs-Anlagen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1138579A (fr) * 1955-12-14 1957-06-17 Cie Ind Des Telephones Dispositif d'envoi d'un courant d'appel

Also Published As

Publication number Publication date
NL104005C (enrdf_load_stackoverflow)
FR1237437A (fr) 1960-07-29
NL232178A (enrdf_load_stackoverflow)
CH375046A (de) 1964-02-15
JPS3623516B1 (enrdf_load_stackoverflow) 1961-12-11
DE1146925B (de) 1963-04-11

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