Impedance matching circuit for current regulation of solid state lighting
First Claim
1. An impedance matching circuit for providing variable power to an electronic load couplable to solid-state lighting, the circuit comprising:
- a first resistor coupled to receive a first current from the electronic load;
a second resistor; and
a switch coupled in series to the second resistor, the switch responsive to a control voltage to modulate a second current through the second resistor in response to a detected level of the first current through the first resistor.
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Accused Products
Abstract
Exemplary embodiments provide an impedance matching circuit for providing variable power from a dimmer switch having a triac to a switching power supply couplable to solid-state lighting. An exemplary impedance matching circuit includes a first resistor coupled to receive a first current from the switching power supply; a second resistor; and a transistor coupled in series to the second resistor, with the transistor responsive to a gate voltage to modulate a second current through the second resistor in response to a detected level of the first current through the first resistor.
344 Citations
23 Claims
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1. An impedance matching circuit for providing variable power to an electronic load couplable to solid-state lighting, the circuit comprising:
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a first resistor coupled to receive a first current from the electronic load;
a second resistor; and
a switch coupled in series to the second resistor, the switch responsive to a control voltage to modulate a second current through the second resistor in response to a detected level of the first current through the first resistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An impedance matching circuit for providing variable power from a dimmer switch having a triac to a switching power supply couplable to solid-state lighting, the circuit comprising:
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a first resistor coupled to receive a first current from the switching power supply;
a second resistor; and
a transistor coupled in series to the second resistor, the series-connected transistor and second resistor further couplable in parallel across the switching power supply, the transistor responsive to a gate voltage to modulate a second current through the second resistor in response to a detected level of the first current through the first resistor. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. An impedance matching circuit for providing variable power from a dimmer switch having a triac to a switching power supply couplable to solid-state lighting, the circuit comprising:
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a first resistor coupled to receive a first current from the switching power supply and provide a first voltage level;
a voltage limiter coupled in parallel to the first resistor to limit a magnitude of the first voltage level;
a second resistor; and
a depletion mode field effect transistor coupled in series to the second resistor, the series-connected transistor and second resistor further couplable in parallel across the switching power supply, the transistor adapted to modulate a second current through the second resistor in response to the first voltage level. - View Dependent Claims (23)
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Specification