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GB1181350A - Improvements in Electrical Switching Regulators - Google Patents

Improvements in Electrical Switching Regulators

Info

Publication number
GB1181350A
GB1181350A GB4303868A GB4303868A GB1181350A GB 1181350 A GB1181350 A GB 1181350A GB 4303868 A GB4303868 A GB 4303868A GB 4303868 A GB4303868 A GB 4303868A GB 1181350 A GB1181350 A GB 1181350A
Authority
GB
United Kingdom
Prior art keywords
regulator
transistor
output
voltage
mark
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
GB4303868A
Inventor
Anthony David Newton
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.)
British Radio Corp Ltd
Original Assignee
British Radio Corp 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 British Radio Corp Ltd filed Critical British Radio Corp Ltd
Priority to GB4303868A priority Critical patent/GB1181350A/en
Publication of GB1181350A publication Critical patent/GB1181350A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
    • H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
    • H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators

Landscapes

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

Abstract

1, 181,350. Automatic control of current and voltage. BRITISH RADIO CORP. Ltd. Sept.10, 1968, No.43038/68. Heading G3R. A switching regulator of the type providing a stabilized electrical output, e.g. voltage or current, and including a switching element operated with a variable mark/space ratio in dependence on a feedback signal derived from the output is provided with a circuit operative on the feedback loop to hold the mark/space ratio at a predetermined low value during initial operation of the regulator, so that the switching element is protected against the excessively large current pulses that might otherwise occur at switch-on. As shown, a load 16 is supplied from a source 10 by way of a switching transistor 11 and a smoothing circuit 12, 13, 14; the switching mark/space ratio of transistor 11 is controlled by a pulse generator 20, e.g. a Schmitt trigger circuit, in dependence upon a feedback signal derived on line 22 from a differential amplifier 33 which compares a reference signal, derived from a voltage divider 34, 35, with a signal derived from the output by way of line 30, Zener diode 31 and resistor 32. The potentiometer 35 of the voltage divider is shunted by a capacitor 40 and a transistor 41 having its base connected to the regulator output by way of a Zener diode 44 and a resistor 45. When the regulator is first switched on, the transistor 41 is rendered conductive to short-circuit potentiometer 35 so that the reference input to the differential amplifier is low, and the mark/space ratio of the regulator is held at a low value; as the output voltage builds up, Zener diode 44 conducts to render transistor 41 non-conductive and capacitor 40 then charges up so that the reference signal gradually builds up to its normal value. When the regulator is switched off the transistor 41 conducts as soon as the regulator output is insufficient to overcome the Zener voltage of diode 44, and this discharges capacitor 40 in preparation for the regulator being switched on again.
GB4303868A 1968-09-10 1968-09-10 Improvements in Electrical Switching Regulators Expired GB1181350A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4303868A GB1181350A (en) 1968-09-10 1968-09-10 Improvements in Electrical Switching Regulators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4303868A GB1181350A (en) 1968-09-10 1968-09-10 Improvements in Electrical Switching Regulators

Publications (1)

Publication Number Publication Date
GB1181350A true GB1181350A (en) 1970-02-11

Family

ID=10427054

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4303868A Expired GB1181350A (en) 1968-09-10 1968-09-10 Improvements in Electrical Switching Regulators

Country Status (1)

Country Link
GB (1) GB1181350A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818318A (en) * 1972-03-27 1974-06-18 H Schott Apparatus for regulating a d.c. voltage
US3959714A (en) * 1973-09-24 1976-05-25 Sperry Rand Corporation Transient turn-on protection circuit for power supplies
US3986101A (en) * 1975-03-10 1976-10-12 Ncr Corporation Automatic V-I crossover regulator
DE2903481A1 (en) * 1979-01-30 1980-07-31 Frako Kondensator Apparate Switching regulator current supply with voltage regulator - uses threshold voltage switching of control pulse FET switch w.r.t supply level, preventing overshoot
FR2517500A1 (en) * 1981-11-27 1983-06-03 Thomson Csf TELEVISION RECEIVER SCAN CONTROL CIRCUIT WITH PROGRESSIVE START-UP
GB2246882A (en) * 1990-07-25 1992-02-12 Power Trends Inc Miniaturized switching power supply having unidirectional spike filter

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818318A (en) * 1972-03-27 1974-06-18 H Schott Apparatus for regulating a d.c. voltage
US3959714A (en) * 1973-09-24 1976-05-25 Sperry Rand Corporation Transient turn-on protection circuit for power supplies
US3986101A (en) * 1975-03-10 1976-10-12 Ncr Corporation Automatic V-I crossover regulator
DE2903481A1 (en) * 1979-01-30 1980-07-31 Frako Kondensator Apparate Switching regulator current supply with voltage regulator - uses threshold voltage switching of control pulse FET switch w.r.t supply level, preventing overshoot
FR2517500A1 (en) * 1981-11-27 1983-06-03 Thomson Csf TELEVISION RECEIVER SCAN CONTROL CIRCUIT WITH PROGRESSIVE START-UP
EP0080915A1 (en) * 1981-11-27 1983-06-08 Thomson-Csf Television receiver deflection control circuit with a progressive start
GB2246882A (en) * 1990-07-25 1992-02-12 Power Trends Inc Miniaturized switching power supply having unidirectional spike filter
GB2246882B (en) * 1990-07-25 1995-02-15 Power Trends Inc Miniaturized switching power supply having unidirectional spike filter

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