Power converter employing a multivibrator-inverter
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United States of America Patent
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Sep 22, 1992
Grant Date -
N/A
app pub date -
May 6, 1991
filing date -
May 6, 1991
priority date (Note) -
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Abstract
A high efficiency, self-oscillating LC resonant multivibrator-inverter circuit employing a pair of switching transistor (Q1, Q2), two magnetically independent resonant inductors (L1, L2) and one common resonant capacitor (CR). Two secondary windings (NB2, NB1) of the resonant inductors provide feedback control for the switching transistors' bases, to provide intermittent feedback current to effect alternate and periodic conduction of the transistors. This results in the DC voltage rectified from the source S being converted to relatively high frequency AC voltage across output terminals (O1, O2). Such an arrangement enables construction of a cost effective, highly efficient, and highly reliable electronic ballast for fluorescent lamps.
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