GB992661A - Improvements of and relating to transistorized control circuits - Google Patents

Improvements of and relating to transistorized control circuits

Info

Publication number
GB992661A
GB992661A GB476762A GB476762A GB992661A GB 992661 A GB992661 A GB 992661A GB 476762 A GB476762 A GB 476762A GB 476762 A GB476762 A GB 476762A GB 992661 A GB992661 A GB 992661A
Authority
GB
United Kingdom
Prior art keywords
transistor
diode
voltage
relating
feb
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
GB476762A
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.)
BBC Brown Boveri AG Switzerland
BBC Brown Boveri France SA
Original Assignee
Brown Boveri und Cie AG Switzerland
BBC Brown Boveri France SA
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 Brown Boveri und Cie AG Switzerland, BBC Brown Boveri France SA filed Critical Brown Boveri und Cie AG Switzerland
Publication of GB992661A publication Critical patent/GB992661A/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
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
    • H03K17/0814—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit
    • H03K17/08146—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit in bipolar transistor switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • 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
    • H03K17/64—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 having inductive loads
    • 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
    • H03K17/70—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 having only two electrodes and exhibiting negative resistance

Landscapes

  • Relay Circuits (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Electronic Switches (AREA)

Abstract

992,661. Transistor switching circuits. BROWN BOVERI & CO. Ltd. Feb. 7, 1962 [Feb. 9, 1961], No. 4767/62. Heading H3T. A transistor switching circuit operated from a supply having a voltage greater than the maximum safe value for the transistor is protected from damage by connecting a 4-layer diode 2 in series with the transistor and shunting the transistor by a resistor 6 such that the current flow is less than the diode breakdown current, whereby the voltage drop across the diode reduces the transistor voltage to a safe value. When the transistor is rendered conductive the diode breaks down and the full voltage is applied to the relay or other load 3.
GB476762A 1961-02-09 1962-02-07 Improvements of and relating to transistorized control circuits Expired GB992661A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH154761A CH383502A (en) 1961-02-09 1961-02-09 Relay circuit with a transistor

Publications (1)

Publication Number Publication Date
GB992661A true GB992661A (en) 1965-05-19

Family

ID=4212960

Family Applications (1)

Application Number Title Priority Date Filing Date
GB476762A Expired GB992661A (en) 1961-02-09 1962-02-07 Improvements of and relating to transistorized control circuits

Country Status (5)

Country Link
BE (1) BE613608A (en)
CH (1) CH383502A (en)
DE (1) DE1171500B (en)
FR (1) FR1314215A (en)
GB (1) GB992661A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL122382C (en) * 1963-12-17
FR2219554B1 (en) * 1973-02-28 1978-03-03 Electricite De France

Also Published As

Publication number Publication date
DE1171500B (en) 1964-06-04
FR1314215A (en) 1963-01-04
CH383502A (en) 1964-10-31
BE613608A (en) 1962-05-29

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