H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 41/14 (2006.01) H05B 41/282 (2006.01) H05B 41/288 (2006.01)
Patent
CA 2502846
The present invention relates to a ballast for at least one lamp (La) having at least two switches (S1, S2), two switches in each case being arranged in series; a control circuit for alternately opening and closing at least two switches arranged in series; a connection for applying a supply voltage (U0) to in each case two switches (S1, S2) arranged in series; a resonant starting circuit, the resonant starting circuit being coupled on the input side to the junction point between two switches (S1, S2) arranged in series and on the output side to a first connection (10) for the lamp (La), the resonant starting circuit having a resonant inductance (L1) which is arranged in series with the junction point between the two switches (S1, S2) and the first connection (10) for the lamp (La), and a resonant capacitance (C1) which is arranged for alternating current purposes in parallel with the first and second connections (10, 12) for the lamp (La), a first braking inductance (L B1) being provided which, for alternating current purposes, is firstly arranged in series with the first (10) of the two connections (10, 12) for the lamp (La) and secondly in parallel with the resonant capacitance (C1).
Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh
Smart & Biggar
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