H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 37/02 (2006.01)
Patent
CA 2517812
The present invention relates to a circuit arrangement for dimming at least one lamp, comprising a connection for a supply voltage (U e); a dimming device (10) that is connected on the input side to the connection for the supply voltage (U e) and has an input (8) for a dimming selection and at least one switch; and a filter device (12) that is connected to the output of the dimming device (10), the filter device (12) having at least one capacitor (C1; C2) and an output for coupling to an electronic ballast; wherein it also has an input impedance modification device (18) that is connected to the filter device (12) and is designed to modify the input impedance active at the input of the filter device (12). It relates, moreover, to a method for dimming at least one lamp in the case of which a signal to a filter device (12) is provided with the aid of a dimming device (10) that is connected to a supply voltage (U e), and wherein the filter device (12) has at least one capacitor (C1; C2) and an output for coupling to an electronic ballast for the lamp, wherein the input impedance active at the input of the filter device (12) is modified as a function of the supply voltage (U e).
Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh
Smart & Biggar
LandOfFree
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