Circuit for radiofrequency devices applicable to living tissues and device containing same
First Claim
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1. A circuit for supplying output electrodes of a radiofrequency device applicable to living tissues, said circuit comprising:
- a transformer having a primary winding, a secondary winding, and a turn ratio of 1;
N, where N is a real number;
a resonant serial filter connected to the primary winding of the transformer having an inductor LS1 connected in series with a capacitor CS1; and
a resonant parallel filter connected to the secondary winding of the transformer having an inductor Lp connected in parallel with a capacitor CP;
wherein the resonant serial filter and the resonant parallel filter allow a fundamental signal of an input signal, which includes harmonics, to simultaneously pass through and exponentially attenuate the harmonics as a frequency of said harmonics increases, andwherein an output frequency of said circuit is varied such that a combined impedance of a plurality of output electrodes connected to the circuit, and living tissue in contact with the output electrodes matches an impedance of the circuit.
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Abstract
The supply circuit for the electrodes comprises a series resonant filter and a parallel resonant filter, tuned to admit the fundamental signal of the input signal and simultaneously and exponentially attenuate the remaining harmonics by increasing the frequency thereof, in such a way that the input signal with harmonics only passes the fundamental signal without attenuation to the output, while the harmonics causing interferences are increasingly attenuated as their frequency is raised.
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Citations
7 Claims
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1. A circuit for supplying output electrodes of a radiofrequency device applicable to living tissues, said circuit comprising:
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a transformer having a primary winding, a secondary winding, and a turn ratio of 1;
N, where N is a real number;a resonant serial filter connected to the primary winding of the transformer having an inductor LS1 connected in series with a capacitor CS1; and a resonant parallel filter connected to the secondary winding of the transformer having an inductor Lp connected in parallel with a capacitor CP; wherein the resonant serial filter and the resonant parallel filter allow a fundamental signal of an input signal, which includes harmonics, to simultaneously pass through and exponentially attenuate the harmonics as a frequency of said harmonics increases, and wherein an output frequency of said circuit is varied such that a combined impedance of a plurality of output electrodes connected to the circuit, and living tissue in contact with the output electrodes matches an impedance of the circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification