GR66665

A circuit for reducing the voltage of a d-c power supply with one grounded terminal comprises a chopping transistor in an ungrounded supply lead, periodically turned on and off by an electronic switch, and an L/C network downstream of that transistor along with a flywheel diode. The switch lies in s...

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Bibliographic Details
Main Author UMBERTO MERONI
Format Patent
LanguageEnglish
Published 07.04.1981
Subjects
APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS
CONTROL OR REGULATION THEREOF
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
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Summary:A circuit for reducing the voltage of a d-c power supply with one grounded terminal comprises a chopping transistor in an ungrounded supply lead, periodically turned on and off by an electronic switch, and an L/C network downstream of that transistor along with a flywheel diode. The switch lies in series with an ancillary voltage generator, having a terminal voltage substantially lower than the supply voltage, in a grounded loop which is reactively coupled to the transistor base via a capacitor or a transformer. A control signal for opening and closing the switch may be obtained from a square-wave generator connected across the transistor output and driven by the stepped-down supply voltage.
Bibliography:Application Number: GR19800161301