Patent ID: 9192423
Filing Date: 2015-11-24
Classification: A61B,H03L

Abstract:
1. An electrosurgical generator for generating an RF output voltage, comprising: an output circuit and an RF power oscillator for exciting the output circuit with a first excitation frequency, which corresponds to a resonant frequency of the output circuit, in a first operating mode, wherein the RF power oscillator is configured for exciting the output circuit with a second excitation frequency that differs from the first excitation frequency and does not correspond to the resonant frequency of the output circuit in a second operating mode by setting the output voltage of the RF power oscillator to the second excitation frequency independently of the phase of the output current of the power oscillator, and wherein the RF power oscillator comprises switching elements (i) for controlling a direction of an excitation voltage, wherein the RF power oscillator excites the output circuit in a feedback operation in the first operating mode depending on a direction of an excitation current of the RF power oscillator by said switching elements so that the RF power oscillator drives the output circuit, and (ii) for setting the second excitation frequency in the second operating mode.