Resources Contact Us Home
Ballast with inverter startup circuit

Image Number 2 for United States Patent #6856100.

A ballast (20, 20') includes a rectifier circuit (100), a boost converter (200, 200'), an inverter (300), an output circuit (400), and an inverter startup circuit (600). Inverter startup circuit (600) is coupled between boost converter (200) and inverter (300). During operation, inverter startup circuit (600) provides a delay period between startup of boost converter (200) and startup of inverter (300) so that startup of inverter (300) is delayed until at least such time as the DC rail voltage provided by boost converter (200) approaches its steady-state operating level. This ensures that the ballast (20,20') provides an output voltage that is sufficiently high to ignite a lamp (40) in a preferred manner, with little or no glow current and a fast strike time.

  Recently Added Patents
Method of making and using an alpha-glucanase composition to reduce or remove biofilm
Malicious attack detection and analysis
Battery pack with interchangeable circuit substrates
Switchgear and method for operating switchgear
Display sheet, display device, and electronic apparatus
Nanofibers containing latent reactive groups
Front exterior of an automotive tail lamp
  Randomly Featured Patents
Releasable securing knob assembly
Silver recovery cartridge for used fixer of neutral or higher pH
Shock tube initiator with phthalocyanine color indicator
Deployment and retraction arrangement for a slot cover
Weld-containing polyarylene sulfide resin molded article
Cosmetic mirror
Joint endoprosthesis
Current sense trench type MOSFET with improved accuracy and ESD withstand capability
Effluent shower for pulp washer
Compounds, preparation and use for transferring nucleic acids into cells