Circuit for supplying current
First Claim
1. Current-supply circuit for producing a DC voltage or a DC current, having;
- a switching regulator (10) that produces a first output voltage (U-) at a first output (11), with the first output voltage being in a first range, through a switching operation of at least one switching element (T1) in the regulator;
at least one additional circuit (14, 14'"'"') that produces, from an alternating quantity (15) occurring at a connecting point (13) inside the switching regulator (10), a second output voltage (U+, U'"'"'+) at a second output (17), the second output voltage being in a second range; and
decoupling diodes (D3, D3'"'"', D4) that guide the first and second voltage outputs (11,
17) together to a common output (18).
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Accused Products
Abstract
A power-supply circuit having a switching regulator (10) and at least one additional circuit (14, 14'"'"') whose two respective outputs (11, 17) are guided together to a common or joint output (18) by diodes (D3, D3'"'"'; D4). The additional circuit (14, 14'"'"') produces, from an alternating quantity (15) occurring inside the switching regulator (10), a second output voltage (U+, U'"'"'+) that is in a second output-voltage range and is more positive with respect to the first output voltage (U-) that is made available at the first output (11) of the switching regulator (10) and is in a first output-voltage range. A gas-discharge lamp, for example, is provided as the load (L) between the first and second outputs. The division of the voltage ranges to be made available for the load (L) into at least two partial ranges permits a high effectiveness of the current-supply circuit of the invention.
11 Citations
22 Claims
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1. Current-supply circuit for producing a DC voltage or a DC current, having;
- a switching regulator (10) that produces a first output voltage (U-) at a first output (11), with the first output voltage being in a first range, through a switching operation of at least one switching element (T1) in the regulator;
at least one additional circuit (14, 14'"'"') that produces, from an alternating quantity (15) occurring at a connecting point (13) inside the switching regulator (10), a second output voltage (U+, U'"'"'+) at a second output (17), the second output voltage being in a second range; and
decoupling diodes (D3, D3'"'"', D4) that guide the first and second voltage outputs (11,
17) together to a common output (18). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- a switching regulator (10) that produces a first output voltage (U-) at a first output (11), with the first output voltage being in a first range, through a switching operation of at least one switching element (T1) in the regulator;
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11. A power-supply circuit for producing a DC voltage or a DC current, comprising:
- a switching regulator (10), which through a switching operation of at least one switching element (T1) in the switching regulator, produces a negative output voltage (U-), relative to ground, at a first output (11);
at least one additional circuit (14, 14'"'"') having an input which is coupled to a connecting point within the switching regulator at which an alternating variable occurs, and which produces a second positive output voltage (U+, U'"'"'+), relative to ground, from the alternating quantity (15) occurring at the connecting point (13) within the switching regulator (10) at a second output (17); and
, decoupling diodes (D3, D3'"'"', D4) that bring together the first and second outputs (11,
17) at a joint output (18) for the energy supply of a load (L) connected between the first output (11) and the joint output (18). - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- a switching regulator (10), which through a switching operation of at least one switching element (T1) in the switching regulator, produces a negative output voltage (U-), relative to ground, at a first output (11);
Specification