Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
March 17, 2009
Patent Application Number
10578107
Date Filed
November 2, 2004
Patent Citations Received
Patent Primary Examiner
Patent abstract
A frequency converter circuit has at least two outputs that are respectively connected to a load, in particular an induction coil. A first output is operated at a first switching frequency and a second output is simultaneously operated at a second switching frequency that is different from the first, in such a way that noise having a frequency generated by the superposition of the first switching frequency and the second switching frequency is produced. The frequency converter circuit is operated in such a way that the frequency of the noise is lower than a first cutoff frequency and/or is higher than a second cutoff frequency.
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