Zone addressing circuit for an electronic ballast
US8450946B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2011 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Nov 29, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B47/198
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A zone addressing circuit is provided for an electronic ballast having a boost inductor with an auxiliary winding. The zone addressing circuit includes a first circuit branch coupled to a first addressing input terminal, a second circuit branch coupled to a second addressing input terminal, and a third (common) branch coupled on a first end to a third addressing input terminal and on a second end to the auxiliary winding of the boost inductor for providing a high frequency input pulse signal to excite the first and second branches. The first branch generates a first digital output for the zone addressing circuit when coupled to the common branch, and the second branch generates a second digital output for the zone addressing circuit when coupled to the common branch. A controller adjusts a dimming level of the ballast based on the first and second digital outputs from the zone addressing circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.