Ballast circuit for a 220-volt improved lighting unit

Ballast circuit for accurately regulating HID lamp wattage

Ballast circuit for fluorescent lamp

Ballast circuit for multiple parallel negative impedance loads

Ballast circuit having enhanced output isolation transformer...

Ballast circuit with an ignitor for starting multiple HID lamps

Ballast circuit with improved transfer functions

Ballast connector

Ballast control IC with power factor correction

Ballast converter with power factor and current crest factor...

Ballast for a discharge lamp with integrated control circuit...

Ballast for at least one electric incandescent lamp

Ballast for operating at least one low-pressure discharge lamp

Ballast system including a starting aid for a gaseous discharge

Ballast with braking inductance

Ballast with end-of-lamp-life protection circuit

Ballasting system for fluorescent lamps having improved energy t

Betatron including electromagnet structure and energizing circui

Bi-directional light emitting diode drive circuit in pulsed...

Biasing circuit for thyratron