Patent ID: 8148915

Claim:
An electronic ballast device comprising: a stabilizer comprising: a first input terminal and a second input terminal; an output terminal electrically connected to a fluorescent lamp; and a power module for providing a working voltage to the first input terminal; and a sweep frequency circuit comprising: a boost element comprising a first end electrically connected to the first input terminal and a second end; an impedance element comprising a first end electrically connected to the second end of the boost element and a second end; a switch comprising an input terminal electrically connected to the second end of the boost element and the first end of the impedance element, an output terminal and a reference voltage input terminal electrically connected to the first end of the boost element and the first input terminal of the stabilizer; and a frequency selective circuit electrically connected to the output terminal of the switch, the first input terminal of the stabilizer and the second input terminal of the stabilizer.