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US 6,583,998 B2Granted
Power supply regulating having novel charging circuitry
AssigneeBose Corporation
InventorSean S. Chiu
Life of this patent
Estimating the term…
Abstract
A power supply constructed and arranged so that the power supply is charged during an interval during the rising edge and during an interval during the falling edge, and so that the charging circuitry does not charge the capacitor at the peak of the AC cycle.
Claims10
A power supply, comprising:
- a capacitor having a first terminal and a second terminal;
- first and second line input terminals for connecting to a source of AC line current;
- a transformer, coupled to said first and second line input terminals;
- a rectifier, coupled to said transformer, constructed and arranged to provide a voltage waveform having a rising edge, a falling edge, and a peak;
- and
- charging circuitry, coupling said rectifier and said capacitor, constructed and arranged for charging said capacitor to a nominal DC output voltage;
- wherein said power supply is constructed and arranged so that said charging circuitry charges said capacitor during an interval during said rising edge and during an interval during said falling edge, and so that said charging circuitry does not charge said capacitor at said peak.
4 more elements
A power supply, comprising:
- first, second, and third output terminals;
- first and second line input terminals for connecting to a source of AC line current;
- a transformer, coupled to said first and second line input terminals;
- a rectifier, coupled to said transformer;
- charging circuitry, for charging said first, second, and third output terminals to first, second, and third electrical potentials respectively, so a potential difference between said first potential and said second potential is less than a potential difference between said first potential and said third potential, said charging circuitry comprising a single switch.
2 more elements
A power supply, comprising:
- a capacitor having a first terminal and a second terminal;
- first and second line input terminals for connecting to a source of AC line current;
- a transformer, coupled to said first and second line input terminals;
- a rectifier, coupled to said transformer constructed and arranged to provide a voltage waveform having a rising edge, a falling edge, and a peak;
- and
- charging circuitry, coupling said rectifier and said capacitor, for charging said capacitor to a nominal DC output voltage;
- wherein said power supply is constructed and arranged to charge said capacitor twice during each cycle of said rectified AC.
4 more elements
Dependencies are inferred from the claim text.