GB1477933A - Transistor switching circuits - Google Patents

Transistor switching circuits

Info

Publication number
GB1477933A
GB1477933A GB4119974A GB4119974A GB1477933A GB 1477933 A GB1477933 A GB 1477933A GB 4119974 A GB4119974 A GB 4119974A GB 4119974 A GB4119974 A GB 4119974A GB 1477933 A GB1477933 A GB 1477933A
Authority
GB
United Kingdom
Prior art keywords
current
transistors
pulse
transformers
sept
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
GB4119974A
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.)
Fujitsu Services Ltd
Original Assignee
Fujitsu Services 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 Fujitsu Services Ltd filed Critical Fujitsu Services Ltd
Priority to GB4119974A priority Critical patent/GB1477933A/en
Publication of GB1477933A publication Critical patent/GB1477933A/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
    • H03K17/12—Modifications for increasing the maximum permissible switched current
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

1477933 Transistor inverters INTERNATIONAL COMPUTERS Ltd 19 Sept 1975 [21 Sept 1974] 41199/74 Heading H2F [Also in Division H3] To stabilize partition of switched current pulses between collector-emitter paths of a plurality of transistors, e.g. TR1-TR4, connected in parallel in a pulse switching circuit driven by a pulse source 12 feeding the bases, the collector-emitter paths are interconnected by transformers to increase the impedance to any out of balance current with simultaneous inducement of increased current through any path connected to the other winding. For equal current storing all transformers have 1 : 1 ratio; for non-uniform partition, ratios may be adjusted accordingly. For two transistors only one transformer is used, but for more than two transistors cyclic connection as T1-T4 allows a loss of current through one transistor to be compensated by all the remainder. Diodes D1-D4 assist turn off at the end of each pulse fed through base resistors R1-R4. Application of two such switching circuits to a push-pull inverter is possible used for example in a computer power supply.
GB4119974A 1975-09-19 1975-09-19 Transistor switching circuits Expired GB1477933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4119974A GB1477933A (en) 1975-09-19 1975-09-19 Transistor switching circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4119974A GB1477933A (en) 1975-09-19 1975-09-19 Transistor switching circuits

Publications (1)

Publication Number Publication Date
GB1477933A true GB1477933A (en) 1977-06-29

Family

ID=10418577

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4119974A Expired GB1477933A (en) 1975-09-19 1975-09-19 Transistor switching circuits

Country Status (1)

Country Link
GB (1) GB1477933A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2609213A1 (en) * 1986-12-30 1988-07-01 Sgs Microelettronica Spa POWER TRANSISTOR HAVING IMPROVED RESISTANCE TO DIRECT SECONDARY CLARIFICATION

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2609213A1 (en) * 1986-12-30 1988-07-01 Sgs Microelettronica Spa POWER TRANSISTOR HAVING IMPROVED RESISTANCE TO DIRECT SECONDARY CLARIFICATION

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Legal Events

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