专利名称：Gas discharge lamp ballast with heating
control circuit and method of operatingsame
发明人：Siegfried Luger,Thomas Marinelli申请号：US08/530710申请日：19950919公开号：US05656891A公开日：19970812
摘要：There is provided a ballast for at least one gas discharge lamp having
an inverter which has two switches (S1, S2) in series, connected to a d.c. voltage sourceand switched with complementary timings, and a load circuit connected in parallel withone of the two switches (S1, S2) which load circuit includes a series resonant circuit (L1, C1)and the lamp (LA). Additionally there is provided a heating circuit (T, S3,R1) for currentsupply of the lamp coils, likewise connected to the inverter, which heating circuit includesa further periodically switchable switch (S3) for control of the heating current, wherebythe heating circuit is likewise connected in parallel to one of the two switches of theinverter.
申请人：TRIDONIC BAUELEMENTE GMBH
代理机构：Fitzpatrick, Cella, Harper & Scinto
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