Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
PVD coated tool
Semiconductor device including a clock generating circuit for generating an internal signal having a coarse delay line, a fine delay line and a selector circuit
Shield for vacuum circuit breaker
Method and apparatus to maintain welding current to compensate for deterioration of welding contact tip
Method of using nutritional compounds dihydroquercetin (taxifolin) and arabinogalactan in combination with dihydroquercetin (taxifolin) to reduce and control cardiometabolic risk factors assoc
Fluid intake and content management system
Telephone relaying apparatus, telephone relaying method, and program
  Randomly Featured Patents
Jewelry chain
Slave mode thermal control with throttling and shutdown
Waste solution treatment method and apparatus therefor
Easily releasable clamp
Concurrent processing elements for using dependency free code
Image forming apparatus in which images are stored in an external memory
Bubble machine
Serial architecture for memory module control
Filtering device, especially a suction return filter
Passive shimming technique for MRI magnets