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US 2006/0067094 A1Published application
Capacitively coupled power supply
AssigneeThomson Licensing
InventorRudolf Weber
Life of this patent
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Abstract
A power supply comprises a pair of first and second capacitors forming a capacitive voltage divider. A source of a periodic input supply voltage is coupled to the capacitive voltage divider for producing in the second capacitor, from a portion of the periodic input supply voltage, a second supply voltage that is coupled to a load circuit. A switch is coupled to the second capacitor for selectively coupling the first capacitor to the second capacitor in a manner to regulate the second supply voltage.
Claims19
A power supply comprising:
- a pair of first and second capacitors forming a capacitive voltage divider;
- a source of a periodic input supply voltage coupled to said capacitive voltage divider for producing in said second capacitor from a portion of said periodic input supply voltage, a second supply voltage that is coupled to a load circuit;
- and
- a switch coupled to said second capacitor for selectively coupling said first capacitor to said second capacitor in a manner to regulate said second supply voltage.
1 more element
A power supply, comprising:
- a first capacitor;
- a second capacitor that is selectively coupled to the first capacitor to form a capacitive voltage divider;
- a control circuit coupled to said second capacitor for sensing the voltage across one of said first and second capacitors and for controllably coupling the first and second capacitors.
Dependencies are inferred from the claim text.