Ballast with anti-striation circuit
US8937437B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2013 |
| Grant date | Jan 20, 2015 |
| Priority date | — |
| Expiry date | Jun 13, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/2988
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ballast comprises an inverter circuit for providing an oscillating current signal for energizing the at least one lamp. The inverter circuit comprises a first switching component and a second switching component each having a collector terminal, a base terminal, and an emitter terminal. And, each switching component is configured for alternately operating between a conductive state and a non-conductive state. A first collector-emitter circuit is connected between the collector terminal and the emitter terminal of the first switching component, wherein the first collector-emitter circuit has a first resistance of zero or more Ohms. A second collector-emitter circuit is connected between the collector terminal and the emitter terminal of the second switching component, wherein the second collector-emitter circuit has a second resistance of zero or more Ohms and the first resistance and the second resistance are unequal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.