Electronic ballast for gas discharge lamp having primary and auxiliary resonant circuits
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United States of America Patent
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Sep 1, 1998
Grant Date -
N/A
app pub date -
May 30, 1996
filing date -
May 30, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electronic ballast to power a gas discharge load (FL1) operating from a low frequency AC voltage source (ACVS) equipped with a dimmer (DIM) and having variable voltage magnitude. The device comprising a primary resonant oscillator (RO1) exhibiting an inductive character of frequency dependent impedance as an auxiliary resonant inductance (La) interacting with an auxiliary resonant capacitance (Ca) coupled to a rectifier circuit (RB, VSD) which performs switching and rectifying functions developed by and synchronized with a pulsating current drawn from the rectifier circuit by the primary oscillator circuit (RO1) equipped with switching transistors (Q1, Q2) and adapted to deliver to the gas discharge load (FL1) high frequency signal to of a variable magnitude proportional to the variable magnitude of the voltage of the AC voltage source.
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