公开(公告)号：US09921243B2

公开(公告)日：2018-03-20

申请号：US14069534

申请日：2013-11-01

Applicant: COVIDIEN LP

Inventor： Patrick J. Digmann ,  James A. Gilbert ,  David Farrell

IPC: A61B18/12 ,  G01R1/067 ,  A61B18/14 ,  A61B18/00

CPC classification number: G01R1/06772 ,  A61B18/1206 ,  A61B18/1402 ,  A61B18/1445 ,  A61B2018/00827 ,  A61B2018/00892 ,  G01R1/06788

Abstract: An electrosurgical system is disclosed. The system includes a radio frequency output stage configured to output at least one radio frequency waveform and a current sensor coupled to the output stage and configured to output a first differentiated signal corresponding to a current of the at least one radio frequency waveform, the current sensor coupled to a first conditioning circuit configured to integrate the first differentiated signal to output a processed current signal indicative of the current. The system further includes a voltage sensor coupled to the output stage and configured to output a second differentiated signal corresponding to a voltage of the at least one radio frequency waveform, the voltage sensor coupled to a second conditioning circuit configured to integrate the second differentiated signal to output a processed voltage signal indicative of the voltage, wherein the first and second conditioning circuits have a substantially similar bandpass and phase response.