| abstract |
High-frequency device to generate a plasma arc ( 5 ) for the treatment of biological tissue ( 1 ), in particular in medicine, with a high-frequency generator ( 3 ) having an internal resistor ( 8 ) and, connected thereto by means of a flexible lead ( 10 ), an electrode ( 4 ) with which the plasma arc ( 5 ) is produced in a plasma segment ( 6 ) between the electrode ( 4 ) and the biological tissue ( 1 ), which is likewise electrically connected to the high-frequency generator ( 3 ), such that in the high-frequency generator ( 3 ) a high-frequency voltage source ( 7 ) is provided to which is connected a resonant circuit ( 2 ) that comprises a first reactance element ( 9 a ) with a capacitive action and, in series therewith, a second reactance element ( 9 a ) with an inductive action, and that has a resonant frequency at the frequency of the high-frequency oscillation emitted by the high-frequency voltage source ( 7 ), wherein the voltage to generate the plasma arc ( 5 ) is derived from the first or second reactance element ( 9 a , 9 b ). |