Electrical Circuit With Dual Stage Resonant Circuit For Igniting A Gas Discharge Lamp
First Claim
1. A circuit for igniting and operating a gas discharge lamp, the circuit comprising:
- an inverter comprising a plurality of power switches set to operate at a first switching frequency during a lamp ignition mode to supply a variable voltage output signal; and
a resonant circuit connected to receive the variable voltage output signal from the inverter, wherein said resonant circuit comprises a first circuit stage and a second circuit stage, and further wherein the second circuit stage includes a resonant tank circuit configured to generate a resonant output voltage when the switching frequency of the inverter matches a resonant frequency of the resonant circuit, and wherein the first circuit stage comprises at least one current-suppressing element for reducing an effect of a resonant current that flows in the resonant circuit on a switching current that flows in the inverter.
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Accused Products
Abstract
A circuit such as may be used for igniting and operating a gas discharge lamp is provided. The circuit includes a resonant circuit connected to receive a variable voltage output signal from an inverter. The resonant circuit includes a first circuit stage and a second circuit stage. The second circuit stage includes a resonant tank circuit configured to generate a resonant output voltage when a switching frequency of the inverter matches a resonant frequency of the resonant circuit. The first circuit stage includes at least one current-suppressing element for reducing an effect of a resonant current that flows in the resonant circuit on a switching current that flows in the inverter.
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Citations
20 Claims
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1. A circuit for igniting and operating a gas discharge lamp, the circuit comprising:
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an inverter comprising a plurality of power switches set to operate at a first switching frequency during a lamp ignition mode to supply a variable voltage output signal; and a resonant circuit connected to receive the variable voltage output signal from the inverter, wherein said resonant circuit comprises a first circuit stage and a second circuit stage, and further wherein the second circuit stage includes a resonant tank circuit configured to generate a resonant output voltage when the switching frequency of the inverter matches a resonant frequency of the resonant circuit, and wherein the first circuit stage comprises at least one current-suppressing element for reducing an effect of a resonant current that flows in the resonant circuit on a switching current that flows in the inverter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A circuit for electrically driving a load in at least two distinct modes of operation, the circuit comprising:
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an inverter comprising a plurality of power switches set to operate at a first switching frequency during a first mode of operation to supply a variable voltage output signal; and a resonant circuit connected to receive the variable voltage output signal from the inverter, wherein said resonant circuit comprises a first circuit stage and a second circuit stage, and further wherein the second circuit stage includes a resonant tank circuit configured to generate a resonant output voltage when the set first switching frequency of the inverter matches a resonant frequency of the resonant circuit, and wherein the first circuit stage comprises at least one current-suppressing inductor for reducing an effect of a resonant current in the resonant circuit on a switching current in the inverter. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A circuit for igniting and operating a gas discharge lamp, the circuit comprising:
a resonant circuit connected to receive a variable voltage output signal from an inverter, wherein said resonant circuit comprises a first circuit stage and a second circuit stage, and further wherein the second circuit stage includes a resonant tank circuit configured to generate a resonant output voltage when a switching frequency of the inverter matches a resonant frequency of the resonant circuit, and wherein the first circuit stage comprises at least one current-suppressing element for reducing an effect of a resonant current that flows in the resonant circuit on a switching current that flows in the inverter.
Specification