GB907696A - Improvements relating to contactless switches - Google Patents

Improvements relating to contactless switches

Info

Publication number
GB907696A
GB907696A GB3568459A GB3568459A GB907696A GB 907696 A GB907696 A GB 907696A GB 3568459 A GB3568459 A GB 3568459A GB 3568459 A GB3568459 A GB 3568459A GB 907696 A GB907696 A GB 907696A
Authority
GB
United Kingdom
Prior art keywords
semi
conductor
coil
centre
cross
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
GB3568459A
Inventor
Kurt Gerbig
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.)
ARNSTADT FERNMELDEWERK
Fernmeldewerk Arnstadt VEB
Original Assignee
ARNSTADT FERNMELDEWERK
Fernmeldewerk Arnstadt VEB
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 ARNSTADT FERNMELDEWERK, Fernmeldewerk Arnstadt VEB filed Critical ARNSTADT FERNMELDEWERK
Publication of GB907696A publication Critical patent/GB907696A/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
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/74—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/74—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of diodes
    • H03K17/76—Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

907,696. Automatic exchange systems. FERNMELDEWERK ARNSTADT VEB. Oct. 21, 1959, No. 35684/59. Class 40 (4). A cross-point for a switching matrix comprises between the two legs of a horizontal circuit a condenser C 1 , a semi-conductor switching device D3, a centre-tapped coil T.Dr, a further semi-conductor switching device D2 and a codenser C, the vertical legs being connected to the sides of the condensers nearest the coil by further semi-conductor switching devices D, D1. The semi-conductor devices are normally backbiased to the non-conducting state but to establish a connection the back bias is increased to bring the device to the breakdown condition. The semi-conductor devices may be Zener diodes the connection being established by increasing the potential difference applied between the centre tap of coil TDr and the centre tap of a coil V.Dr connected across the vertical legs. The semi-conductor switch may, however, be double-based diodes or Shockley diodes in which case switching is effected by utilizing one of the flanks of a pulse applied across the centre taps of the coils. As shown connection between two subscribers, say Tln 1 and Tln 100 can be effected by operating the top and bottom cross points of the left-hand column. Talking battery is applied over the centre taps of coils connected across the subscribers' lines, this battery being blocked from the cross point switches by the condensers associated therewith. A cross point network using such cross points is also described for connecting inlets connected to the verticals to outlets connected to the horizontals, the inlets to the verticals also containing an enabling switch of the same type, Fig. 2 (not shown).
GB3568459A 1959-08-26 1959-10-21 Improvements relating to contactless switches Expired GB907696A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH7740559A CH372344A (en) 1959-08-26 1959-08-26 Contactless switch on an electronic basis, in particular for telephone systems

Publications (1)

Publication Number Publication Date
GB907696A true GB907696A (en) 1962-10-10

Family

ID=4535668

Family Applications (2)

Application Number Title Priority Date Filing Date
GB3568459A Expired GB907696A (en) 1959-08-26 1959-10-21 Improvements relating to contactless switches
GB3515161A Expired GB966716A (en) 1959-08-26 1961-09-29 Electronic switch

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB3515161A Expired GB966716A (en) 1959-08-26 1961-09-29 Electronic switch

Country Status (4)

Country Link
CH (1) CH372344A (en)
DE (1) DE1164507B (en)
GB (2) GB907696A (en)
NL (2) NL268731A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8505942D0 (en) * 1985-03-07 1985-04-11 British Telecomm Switching systems

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1006900B (en) * 1955-03-08 1957-04-25 Lorenz C Ag Circuit arrangement for limiting alternating voltages

Also Published As

Publication number Publication date
NL242701A (en)
NL268731A (en)
CH372344A (en) 1963-10-15
DE1164507B (en) 1964-03-05
GB966716A (en) 1964-08-12

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