GB868998A - Improvements in or relating to transistor circuits - Google Patents

Improvements in or relating to transistor circuits

Info

Publication number
GB868998A
GB868998A GB238659A GB238659A GB868998A GB 868998 A GB868998 A GB 868998A GB 238659 A GB238659 A GB 238659A GB 238659 A GB238659 A GB 238659A GB 868998 A GB868998 A GB 868998A
Authority
GB
United Kingdom
Prior art keywords
load
collector
transistor
pulse
capacitor
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
GB238659A
Inventor
Michael Laugharne Nevi Forrest
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.)
International Computers and Tabulators Ltd
Original Assignee
International Computers and Tabulators 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 International Computers and Tabulators Ltd filed Critical International Computers and Tabulators Ltd
Priority to GB238659A priority Critical patent/GB868998A/en
Priority to DEJ17541A priority patent/DE1114224B/en
Publication of GB868998A publication Critical patent/GB868998A/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
    • 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

Landscapes

  • Electronic Switches (AREA)

Abstract

868,998. Transistor switching circuits. INTERNATIONAL COMPUTERS & TABULATORS Ltd. Jan. 5, 1960 [Jan. 22, 1959], No. 2386/59. Class 40(6) In a transistor switching circuit in which the collector is connected to an inductive load, a capacitor is connected to the collector through an impedance so as to charge when the transistor is conductive and discharge through the load when it is non-conductive, the impedance having a higher value for charging current than discharging currents. Thus, the inductive load 2 (which may be a relay) is shunted by a capacitor 8 in series with a parallel resistor-diode combination 6, 7. When an input-pulse causes the transistor to conduct the capacitor charges slowly through resistor 7. At the end of the pulse the back e.m.f. developed across the load causes the collector potential to rise to a value at which the diode 6 commences to conduct. Accordingly the rise of voltage at the collector is delayed and avalanche breakdown avoided. The input pulse may be applied to the base or emitter and is preferably followed by a reverse pulse to speed the switching off, a further diode 5 prevents excessive voltage being developed across the load.
GB238659A 1959-01-22 1959-01-22 Improvements in or relating to transistor circuits Expired GB868998A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB238659A GB868998A (en) 1959-01-22 1959-01-22 Improvements in or relating to transistor circuits
DEJ17541A DE1114224B (en) 1959-01-22 1960-01-16 Pulse-operated transistor circuit for switching a current on and off to an inductive load

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB238659A GB868998A (en) 1959-01-22 1959-01-22 Improvements in or relating to transistor circuits

Publications (1)

Publication Number Publication Date
GB868998A true GB868998A (en) 1961-05-25

Family

ID=9738638

Family Applications (1)

Application Number Title Priority Date Filing Date
GB238659A Expired GB868998A (en) 1959-01-22 1959-01-22 Improvements in or relating to transistor circuits

Country Status (2)

Country Link
DE (1) DE1114224B (en)
GB (1) GB868998A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK110102C (en) * 1964-01-28 1968-11-11 Arenco Ab Thyristor connection.
DE1201403B (en) * 1964-04-07 1965-09-23 Soemmerda Bueromaschwerk Circuit arrangement for transistors that switch inductances
DE1537604B1 (en) * 1967-08-24 1971-01-07 Ganz Villamossagi Muevek Circuit arrangement for reducing the power loss when switching switching transistors
DE4007566C2 (en) * 1990-03-09 1998-07-16 Siemens Ag Power amplifier for feeding an inductance with switched transistors

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1048945B (en) * 1954-11-17 1959-01-22 Siemens Ag Device for the joint control of several controllable semiconductors connected in series
DE1020673B (en) * 1955-10-06 1957-12-12 Siemens Ag Method and device for the joint control of several semiconductor switches in series
DE1071133B (en) * 1958-08-08 1959-12-17 Standard Efcktrik Lorenz Aktiengesellschaft, Stuttgart-Zuffenhausen ARRANGEMENT FOR LIMITING DISCONNECTING VOLTAGES AT INDUCTIVITIES IN A SERIES WITH TRANSISTOR SWITCHES

Also Published As

Publication number Publication date
DE1114224B (en) 1961-09-28

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