Circuit and method for detecting the crest factor of a lamp current or a lamp voltage

摘要

the invention relates to a schaltungsanordnung to capture a crestfaktors a lampenstroms or lampenbrennspannung electric lamp (2), with the schaltungsanordnung a first teilschaltung (15) in which an average value of a to determine the schaltu ngsanordnung invested in training is a second teilschaltung (16) inhow to determine a maximum value from the input signal to the schaltungsanordnung and trained, and a vergleicherschaltung (17) inhow to generate an vergleichssignals from the averaged value and the output signal from the first teilschaltung (15) and a maximum crestfaktor and output signal from the second teilschaltung (16) is trained. the invention relates to a method for recording such a crestfaktors.another aspect of the invention relates to an electronic ballast (1) which erfindungsgemu00e4u00dfe schaltungsanordnung (14a, 14b) projects. in addition, the invention also relates to a method for operating an electrical lamp, in which a crestfaktor in accordance with a erfindungsgemu00e4u00dfen procedures to measure the crestfaktors is carried out.