Patent ID: 9707027
Date: 2017-07-18
CPC Classifications: A61B

Claim:
1. A medical device comprising: a handle for gripping by a user, an end effector coupled to the handle and having at least one electrical contact; a radio frequency (RF) generation circuit coupled to the handle and operable to generate an RF drive signal and to provide the RF drive signal to the at least one electrical contact, wherein the RF generation circuit comprises a resonant circuit; and a control circuit comprising a sampling circuit, wherein the control circuit is configured to vary a frequency of the RF drive signal around a resonant frequency of the resonant circuit and configured to determine the frequency and a phase of the RF drive signal and generate a sampling frequency, and wherein the sampling circuit is configured to sample a sensed voltage signal or a sensed current signal at the sampling frequency, such that the sampling frequency is synchronized with the frequency and the phase of the RF drive signal.