GB928922A - Improvements in or relating to transistorized pulse generators - Google Patents

Improvements in or relating to transistorized pulse generators

Info

Publication number
GB928922A
GB928922A GB32774/60A GB3277460A GB928922A GB 928922 A GB928922 A GB 928922A GB 32774/60 A GB32774/60 A GB 32774/60A GB 3277460 A GB3277460 A GB 3277460A GB 928922 A GB928922 A GB 928922A
Authority
GB
United Kingdom
Prior art keywords
circuit
transistor
square loop
winding
transformer
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
GB32774/60A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB928922A publication Critical patent/GB928922A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53Conversion of dc power input into ac power output without possibility of reversal 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
    • H02M7/537Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters
    • H02M7/5383Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters in a self-oscillating arrangement
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K3/00Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/30Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using a transformer for feedback, e.g. blocking oscillator

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Amplifiers (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

928,922. Transistor oscillator circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. Sept. 23, 1960 [Sept. 26, 1959], No. 32774/60. Class 40 (6). A pulse generator comprises a transistor having in its output current circuit an inductance which determines the rate of rise of output current and which provides positive feed-back, the circuit also including a winding on a square loop core which, when the output current exceeds a predetermined value, changes its state and initiates the cutting off of the transistor. In Fig. 1 two transistors 1 and 2 conduct alternately and are connected to an output transformer 5 which determines the rate of rise of current in the transistors when they become conducting and which provide feed-back to the opposite bases. A square loop core 10 is threaded by the emitter circuit leads so that when the current is such that the core changes its state a sudden reduction in the primary voltage of the transformer 3 takes place so that a reversal of the state of conduction of the transistors is initiated. This prevents the current spike which normally occurs at this point in the cycle. In Fig. 3 (not shown) the square loop core windings are arranged in the circuit connection between the right-hand terminal of battery 7 and winding 3. In Fig. 4 positive feed-back is provided by capacitors 11 and 12 and two square loop cores are provided, the resetting of the cords being effected by the opposite circuit through a coupling loop 17. A single ended circuit (Fig. 5, not shown) comprises an auto transformer positive feed-back path and a biasing winding connected to the supply source to re-set the square loop core when the transistor is not conducting. A further embodiment (Fig. 6, not shown) uses positive feed-back from a transformer connected in series with the secondary of the output transformer and the load and a square loop core winding in the emitter circuit biased by a permanent magnet to one state when the transistor is non-conducting. Appropriate biasing is applied to the transistor to ensure starting. It is stated that the square loop core winding could alternatively be arranged in the base circuit.
GB32774/60A 1959-09-26 1960-09-23 Improvements in or relating to transistorized pulse generators Expired GB928922A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL243791 1959-09-26

Publications (1)

Publication Number Publication Date
GB928922A true GB928922A (en) 1963-06-19

Family

ID=19751952

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32774/60A Expired GB928922A (en) 1959-09-26 1960-09-23 Improvements in or relating to transistorized pulse generators

Country Status (7)

Country Link
JP (1) JPS3810862B1 (en)
CH (1) CH387698A (en)
DE (1) DE1146528B (en)
ES (1) ES261214A1 (en)
FR (1) FR1268236A (en)
GB (1) GB928922A (en)
NL (1) NL243791A (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1033618B (en) * 1955-03-31 1958-07-10 Sinner A G Process for the production of yeast
US2748274A (en) * 1955-05-23 1956-05-29 Clevite Corp Transistor oscillator with current transformer feedback network
US2774878A (en) * 1955-08-29 1956-12-18 Honeywell Regulator Co Oscillators

Also Published As

Publication number Publication date
ES261214A1 (en) 1960-11-16
CH387698A (en) 1965-02-15
FR1268236A (en) 1961-07-28
JPS3810862B1 (en) 1963-07-01
DE1146528B (en) 1963-04-04
NL243791A (en)

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