GB980817A - Improvements in or relating to regulated d.c. power supply circuit arrangements - Google Patents

Improvements in or relating to regulated d.c. power supply circuit arrangements

Info

Publication number
GB980817A
GB980817A GB3491562A GB3491562A GB980817A GB 980817 A GB980817 A GB 980817A GB 3491562 A GB3491562 A GB 3491562A GB 3491562 A GB3491562 A GB 3491562A GB 980817 A GB980817 A GB 980817A
Authority
GB
United Kingdom
Prior art keywords
transistor
current
resistor
series
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
GB3491562A
Inventor
Raymond Leslie Greenfield
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB3491562A priority Critical patent/GB980817A/en
Publication of GB980817A publication Critical patent/GB980817A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G05F1/573—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 overcurrent detector

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

980,817. Automatic voltage regulators. MARCONI CO. Ltd. July 25, 1963 [Sept. 13,1962], No. 34915/62. Heading G3R. [Also in Divisions H2 and H3] A voltage regulator of the series transistor type includes means operable in dependence on current through the transistor and in excess of a predetermined value for closing a shunt path for the base current of the transistor. As shown, a voltage regulator comprises input terminals A, output terminals B, a series transistor T2 controlled in known manner by an amplifier C to maintain constant the output voltage at terminals B, a resistor R2 in series between the emitter of transistor T2 and one output terminal, and a Zener diode ZD subject to the voltage drop across resistor R2 and connected between the base of transistor T2 and the said one output terminal. When the current through resistor R2 exceeds a predetermined value, Zener diode ZD conducts to provide a shunt path across the emitter-base path of the transistor so that the base current is reduced and the current through the transistor is limited at a substantially constant value, whereby the transistor is protected against overload. A further Zener diode ZD<SP>1</SP>, connected in series with a resistor R4 across the collector-emitter path of the transistor T2 is rendered conductive when the voltage across the transistor exceeds a predetermined value, e.g. when output terminals B are short-circuited, whereby the transistor is protected against excessive power dissipation.
GB3491562A 1962-09-13 1962-09-13 Improvements in or relating to regulated d.c. power supply circuit arrangements Expired GB980817A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3491562A GB980817A (en) 1962-09-13 1962-09-13 Improvements in or relating to regulated d.c. power supply circuit arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3491562A GB980817A (en) 1962-09-13 1962-09-13 Improvements in or relating to regulated d.c. power supply circuit arrangements

Publications (1)

Publication Number Publication Date
GB980817A true GB980817A (en) 1965-01-20

Family

ID=10371488

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3491562A Expired GB980817A (en) 1962-09-13 1962-09-13 Improvements in or relating to regulated d.c. power supply circuit arrangements

Country Status (1)

Country Link
GB (1) GB980817A (en)

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