GB1409895A - Electrical switches - Google Patents

Electrical switches

Info

Publication number
GB1409895A
GB1409895A GB5227972A GB5227972A GB1409895A GB 1409895 A GB1409895 A GB 1409895A GB 5227972 A GB5227972 A GB 5227972A GB 5227972 A GB5227972 A GB 5227972A GB 1409895 A GB1409895 A GB 1409895A
Authority
GB
United Kingdom
Prior art keywords
arrangement
nov
transistor
conductive state
gating
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
GB5227972A
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB1409895A publication Critical patent/GB1409895A/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
    • H03K17/06—Modifications for ensuring a fully conducting state
    • 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
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/68—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors specially adapted for switching ac currents or voltages

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electronic Switches (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

1409895 Transistor gating circuits; automatic exchange systems; negative impedance repeaters LICENTIA PATENT-WERWALTUNGS GmbH 13 Nov 1972 [12 Nov 1971] 52279/72 Headings H3T H4K and H4R A gating circuit suitable for use in a telephone one or two wire cross point switching arrangement, Fig. 3 (not shown), comprises a negative impedance arrangement, e.g. cross coupled transistors Ts1, Ts2, Fig. 4, which compensate for attenuation in the signal path when the gating circuit is in its conductive state. To switch to the conductive state, transistor Ts3 is turned off by signal Ust, causing Ts1, Ts2 to be biased into the negative resistance region. Resistor R0 in the biasing circuit may be an FET, and Ts1, Ts2 may be a single four electrode device. Two similar circuits may be used in a balanced arrangement, Fig. 5 (not shown).
GB5227972A 1971-11-12 1972-11-13 Electrical switches Expired GB1409895A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712156166 DE2156166C3 (en) 1971-11-12 1971-11-12 Electronic switch

Publications (1)

Publication Number Publication Date
GB1409895A true GB1409895A (en) 1975-10-15

Family

ID=5824874

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5227972A Expired GB1409895A (en) 1971-11-12 1972-11-13 Electrical switches

Country Status (5)

Country Link
AT (1) AT322639B (en)
CH (1) CH551114A (en)
DE (1) DE2156166C3 (en)
FR (1) FR2160125A5 (en)
GB (1) GB1409895A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2363669C3 (en) * 1973-12-21 1977-02-03 Licentia Gmbh ELECTRONIC COUPLING POINT AND COUPLING POINT ARRANGEMENT
DE2419286C2 (en) * 1974-04-22 1984-02-16 Standard Elektrik Lorenz Ag, 7000 Stuttgart Circuit arrangement for de-attenuating electrical switches with different direct current and alternating current resistances, in particular coupling elements of a telephone exchange
DE2419357C3 (en) * 1974-04-22 1982-02-11 Standard Elektrik Lorenz Ag, 7000 Stuttgart Circuit arrangement for de-attenuation of electronic switches, in particular of semiconductor coupling elements of a telephone exchange
DE2436255C3 (en) * 1974-07-27 1982-05-06 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Attenuation-free electronic switch
JPS5936427A (en) * 1982-08-24 1984-02-28 Mitsubishi Electric Corp Output circuit
DE4425824C2 (en) * 1994-07-08 1997-01-30 Deutsche Telephonwerk Kabel Fully electronic, single-pole switch

Also Published As

Publication number Publication date
DE2156166A1 (en) 1973-07-19
CH551114A (en) 1974-06-28
DE2156166B2 (en) 1975-04-24
FR2160125A5 (en) 1973-06-22
AT322639B (en) 1975-05-26
DE2156166C3 (en) 1982-01-28

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Legal Events

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