GB861727A - Improvements in or relating to sequential switching apparatus - Google Patents

Improvements in or relating to sequential switching apparatus

Info

Publication number
GB861727A
GB861727A GB2737158A GB2737158A GB861727A GB 861727 A GB861727 A GB 861727A GB 2737158 A GB2737158 A GB 2737158A GB 2737158 A GB2737158 A GB 2737158A GB 861727 A GB861727 A GB 861727A
Authority
GB
United Kingdom
Prior art keywords
transistors
relays
circuit
circuits
succession
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
GB2737158A
Inventor
John Louis Carroll
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.)
Microcell Ltd
Original Assignee
Microcell 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 Microcell Ltd filed Critical Microcell Ltd
Priority to GB2737158A priority Critical patent/GB861727A/en
Publication of GB861727A publication Critical patent/GB861727A/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
    • H03K17/62—Switching arrangements with several input- output-terminals, e.g. multiplexers, distributors
    • H03K17/6285—Switching arrangements with several input- output-terminals, e.g. multiplexers, distributors with several outputs only combined with selecting means

Landscapes

  • Relay Circuits (AREA)

Abstract

861,727. Transistor switching circuits. MICROCELL Ltd. Aug. 26, 1959 [Aug. 26, 1958], No. 27371/58. Class 40(6) Apparatus for rendering a number of circuits conducting for a short time interval in succession comprises a number of transistors to which a sloping waveform is applied so as to render the transistors conducting successively, means being provided in the emitter collector path of each transistor which interrupts the path when the transistors conduct. In the figure transistors 10, 11, 12 are biased by resistors 20 to 24 in increasing amounts so that a sawtooth wave applied from a circuit (such as a "boot strap" circuit 26) renders the transistors conducting in succession. The conduction of each transistor operates one of relays 13, 14 and 15, the corresponding contacts of which 17, 18 and 19 open circuit the emitter circuit so that the relays are de-energized after a short time interval. The relays however may be maintained operated by a holding circuit or latching arrangement. The relays may be replaced by fuses which blow when the circuits conduct. In addition, the biasing circuits may be omitted and the sawtooth wave applied to successive transistors through an increasing number of diodes so that due to the forward contact potential of the diodes or their reverse zener potential the transistors conduct in succession (Fig. 2, not shown).
GB2737158A 1958-08-26 1958-08-26 Improvements in or relating to sequential switching apparatus Expired GB861727A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2737158A GB861727A (en) 1958-08-26 1958-08-26 Improvements in or relating to sequential switching apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2737158A GB861727A (en) 1958-08-26 1958-08-26 Improvements in or relating to sequential switching apparatus

Publications (1)

Publication Number Publication Date
GB861727A true GB861727A (en) 1961-02-22

Family

ID=10258525

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2737158A Expired GB861727A (en) 1958-08-26 1958-08-26 Improvements in or relating to sequential switching apparatus

Country Status (1)

Country Link
GB (1) GB861727A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS492247U (en) * 1972-04-06 1974-01-10
JPS4912853U (en) * 1972-05-10 1974-02-02
JPS50159240A (en) * 1974-06-11 1975-12-23
JPS50159659A (en) * 1974-06-13 1975-12-24

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS492247U (en) * 1972-04-06 1974-01-10
JPS4912853U (en) * 1972-05-10 1974-02-02
JPS50159240A (en) * 1974-06-11 1975-12-23
JPS50159659A (en) * 1974-06-13 1975-12-24

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