ELECTRICAL CIRCUIT ARRANGEMENT FOR IGNITING AND FEEDING A GAS AND/OR VAPOUR DISCHARGE TUBE

摘要

The invention relates to a circuit for an inductively stabilized discharge tube (1), which is provided with two preheatable electrodes (2, 3). The ends of one electrode (2) are connected via a first capacitor (22) and a second capacitor (24), respectively, to the corresponding ends of the other electrode (3). According to the invention, the second capacitor (24) remote from the supply is shunted by a PTC resistor (23), the discharge tube (1) and inter alia the PTC resistor (23) forming part of a lamp unit. The discharge tube (1) ignites - even at low ambient temperatures - readily. In the operating condition, the influence of the PTC resistor (23) is negligible.