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.
Type:
Grant
Filed:
January 19, 2007
Date of Patent:
February 2, 2010
Assignee:
Exclara, Inc.
Inventors:
Anatoly Shteynberg, Harry Rodriguez, Dongsheng Zhou