METHOD AND DEVICE FOR PRODUCING SERIES OF IMPULSE VOLTAGES TO OPERATE DISCHARGE LAMPS AND CIRCUIT PERTAINING THERETO

摘要

The invention relates to a method for producing series of impulse voltages t o operate discharge lamps (8) by means of pulsed, dielectrically impeded discharge. According to said method, the series of impulse voltages consists of two series of partial voltages so that the total peak values of each series of partial voltages is lower than the total peak values of the resulting series of impulse voltage e.g. half as big. One advantage is that correspondingly lower EMI arises when the seri es of partial voltages are produced. Also both series of partial voltages have opposite inclined rising edges in relation to a reference potential. Preferably, both series of partial voltages are inverted. This provides ideal and full compensation, at least locally, of electromagnetic interference (EMI) produced by both series of partial voltages. A circuit thus includes two series connected impulse circuits (1; 2) which are synchronised using a timing circuit (3).