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
Pre-primed roofing membrane
Fluid handling structure, a lithographic apparatus and a device manufacturing method
Methods and apparatuses for configuring and operating graphics processing units
Method for mapping resource units
Systems and methods for updating a data store using a transaction store
JTAG multiplexer with clock/mode input, mode/clock input, and clock output
Systems and methods for providing live voicemail to a mobile handset
  Randomly Featured Patents
System for determining time duration of angular rotation
Optical character reading method and system for a document with ruled lines and its application
Free radical inhibitors for quenching aqueous phase polymer growth and related methods
Torque reducer and torque transmitter including the same
System, server and terminal for switching line in local area network
Fastening device for hard disk drive
Stock inlet
Rope cleaning device
Courtesy illumination disk for a cup holder
Combination holder and squeezing device for tube dispensers