GB974504A - Improvements relating to electronic circuit arrangements employing transistors - Google Patents

Improvements relating to electronic circuit arrangements employing transistors

Info

Publication number
GB974504A
GB974504A GB2831160A GB2831160A GB974504A GB 974504 A GB974504 A GB 974504A GB 2831160 A GB2831160 A GB 2831160A GB 2831160 A GB2831160 A GB 2831160A GB 974504 A GB974504 A GB 974504A
Authority
GB
United Kingdom
Prior art keywords
transistor
emitter
electrodes
zener diode
voltage
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
GB2831160A
Inventor
Peter Gabriel Lambert
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB2831160A priority Critical patent/GB974504A/en
Publication of GB974504A publication Critical patent/GB974504A/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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
    • G05F1/569—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
    • G05F1/571—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overvoltage detector
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • 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
    • H03K17/0812—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the control circuit
    • H03K17/08126—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the control circuit in bipolar transitor switches

Abstract

974,504. Semi-conductor protection circuits. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. July 26, 1961 [Aug. 16, 1960], No. 28311/60. Heading H3T. [Also in Division G3] In a circuit in which a transistor is to be protected against excess voltage appearing between two electrodes, a silicon Zener diode is connected between the electrodes such that Zener current will flow if the safe voltage between the electrodes of the transistor is exceeded. The diode may be connected between the collector and emitter, Fig. 1 (not shown), or the base and emitter, Fig. 3, and in the case of a silicon transistor a rectifier D may be included in series with the Zener diode to reduce leakage. The arrangement may be applied to a series regulator, Fig. 4, in which regulation is effected by means of a pair of resistors R1 and R2, the tapping point of which is connected to an amplifier AMP where the voltage is compared with a reference source REF, and a difference voltage applied to the base of transistor T. The protection Zener diode Z is connected between collector and emitter of the transistor.
GB2831160A 1960-08-16 1960-08-16 Improvements relating to electronic circuit arrangements employing transistors Expired GB974504A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2831160A GB974504A (en) 1960-08-16 1960-08-16 Improvements relating to electronic circuit arrangements employing transistors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2831160A GB974504A (en) 1960-08-16 1960-08-16 Improvements relating to electronic circuit arrangements employing transistors

Publications (1)

Publication Number Publication Date
GB974504A true GB974504A (en) 1964-11-04

Family

ID=10273640

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2831160A Expired GB974504A (en) 1960-08-16 1960-08-16 Improvements relating to electronic circuit arrangements employing transistors

Country Status (1)

Country Link
GB (1) GB974504A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2387591A1 (en) * 1977-04-21 1978-11-17 Rivault Paul Electric fence control circuit - has transformer primary supply controlled by transistor circuit with capacitor charged through resistors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2387591A1 (en) * 1977-04-21 1978-11-17 Rivault Paul Electric fence control circuit - has transformer primary supply controlled by transistor circuit with capacitor charged through resistors

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