Impedance matching circuit for current regulation of solid state lighting
US7656103B2 · kind B2 · utility
123Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2007 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Aug 21, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.