Patent-Treuhand-Gesellschaft Fur Elektrisch Gluhlampen Mbh

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A circuit arrangement for producing a control signal (U) for the purpose of dimming at least one lamp, including a device () for modifying the phase gating angle corresponding to a dimming input value (), it being possible for the device () for modifying the phase gating angle to be fed, at its input, an input signal (U), whose phase gating angle is to be modified, and for an output signal (U) having a modified phase gating angle to be provided at its output; and an output at which the control signal (U) can be provided; it also includes a device () for comparing the output signal (U) with a predeterminable signal (U) for the purpose of producing the control signal (U), the amplitude of the predeterminable signal (U) depending on the amplitude of the input signal (U).

Circuit arrangement for producing a control signal for the purpose of dimming at least one lamp

A method and circuit arrangement for dimming at least one lamp, includes a connection for a supply voltage; a dimming device connected on the input side to the supply voltage and has an input for a dimming selection and at least one switch; and a filter connected to the output of the dimming device, the filter having at least one capacitor and an output for coupling to an electronic ballast; wherein it also has an input impedance modification device connected to the filter device and is designed to modify the input impedance active at the input of the filter.

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Traunreut, Germany

Petr Peka