GB902078A - Improvements in or relating to electronic relays - Google Patents

Improvements in or relating to electronic relays

Info

Publication number
GB902078A
GB902078A GB2552758A GB2552758A GB902078A GB 902078 A GB902078 A GB 902078A GB 2552758 A GB2552758 A GB 2552758A GB 2552758 A GB2552758 A GB 2552758A GB 902078 A GB902078 A GB 902078A
Authority
GB
United Kingdom
Prior art keywords
terminal
transistor
circuit
positive
inductor
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
GB2552758A
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 GB902078A publication Critical patent/GB902078A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03K17/601—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 using transformer coupling
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electronic Switches (AREA)
  • Dc-Dc Converters (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

902,078. Transistor switching circuits. PHILIPS ELECTRICAL INDUSTRIES LTD. Aug. 8, 1958 [Aug. 13, 1957], No. 25527/58. Class No. 40 (6). A transistor switching circuit which becomes conductive or non-conductive according as to whether a potential difference or current of a predetermined polarity is applied thereto, comprises a transistor oscillator circuit which generates oscillations when said potential difference or current of said predetermined polarity is applied thereto and a transistor switching circuit to which the output of the oscillator circuit is applied and which becomes conductive according as to whether oscillations are generated or not. In a first embodiment, Fig. 1, a sine-wave oscillator comprises a transistor 1 having an inductor 2 connected in its collector circuit and a series-tuned feed-back circuit comprising an inductor 3 coupled to the inductor 2 and connected between the emitter and base of the transistor 1. The circuit oscillates when a potential which is negative with respect to that applied to the emitter electrode is applied to terminal A. Oscillations induced in winding 18 are rectified by diode 17 to produce a bias voltage for the transistor 11 which as a result becomes conducting. When a relatively positive potential is applied at terminal A diode 8 conducts, thus preventing possible overloading of the transistor 1. The embodiment illustrated in Fig. 2 comprises two multivibrator circuits 1, 1<SP>1</SP> and 21, 21<SP>1</SP> which become respectively operative according as to whether terminal A is positive with respect to terminal B or vice versa. Hence according as to whether terminal A is positive or negative with respect to terminal B transistors 11, 11<SP>1</SP> or transistors 31, 31<SP>1</SP> become alternately conductive so connecting terminal C to the load 12 and the positive supply terminal or to the load 32 and the negative supply terminal.
GB2552758A 1957-08-13 1958-08-08 Improvements in or relating to electronic relays Expired GB902078A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL219872 1957-08-13

Publications (1)

Publication Number Publication Date
GB902078A true GB902078A (en) 1962-07-25

Family

ID=19750950

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2552758A Expired GB902078A (en) 1957-08-13 1958-08-08 Improvements in or relating to electronic relays

Country Status (5)

Country Link
BE (1) BE570304A (en)
CH (1) CH369213A (en)
DE (1) DE1078613B (en)
FR (1) FR1213505A (en)
GB (1) GB902078A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH385338A (en) * 1961-02-10 1964-12-15 Bbc Brown Boveri & Cie Transistor circuit for switching electrical devices, in particular for protective devices
DE1244242B (en) * 1964-09-01 1967-07-13 Siemens Ag Circuit arrangement with feedback generator for converting pulse combinations arriving in series into rectangular currents or sinus currents and re-rectification
DE1236568B (en) * 1965-03-09 1967-03-16 Bbc Brown Boveri & Cie Gate circuit for direct and alternating currents
FR1454411A (en) * 1965-03-26 1966-02-11 Cit Alcatel Self-powered magnetostatic relay
FR1504534A (en) * 1966-07-13 1967-12-08 Thomson Houston Comp Francaise Improvements in connection circuits between two unsynchronized logic sets
DE2411871C2 (en) * 1974-03-12 1984-09-13 Nixdorf Computer Ag, 4790 Paderborn Circuit arrangement for the floating transmission of signals via isolating points in telecommunications systems
DE3028986A1 (en) * 1980-07-30 1982-03-04 Siemens AG, 1000 Berlin und 8000 München MOS FET switch - has triple wound input transformer with blocking oscillator

Also Published As

Publication number Publication date
FR1213505A (en) 1960-04-01
BE570304A (en)
DE1078613B (en) 1960-03-31
CH369213A (en) 1963-05-15

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