Linear power control with PSK regulation
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 30, 2001
Grant Date -
N/A
app pub date -
Oct 6, 1998
filing date -
Oct 6, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
It is an object of the present invention to provide a multi-channel radio frequency (RF) power delivery and control system for applying energy to multiple electrodes of an RF tissue heating device. In a first embodiment of the invention an apparatus for controlling electrical cross-talk in an electro-surgical instrument is disclosed. The apparatus includes: a driver, a first electrode, a second electrode, a ground for delivery of power to a surgical site, a power measurement circuit and a waveform generator. The power measurement circuit computes differences between a target power and an actual power delivered to the first electrode and the second electrode to establish an amount by which to increase and to decrease the power emanating from the first electrode and the second electrode. The waveform generator modulates a driver signal generated by the driver to increase and to decrease an integer number of whole wavelengths of the driver signal to produce a first oscillating signal measured at the first electrode and a second oscillating signal measured at the second electrode. In an alternate embodiment of the invention a method for power control in an electro-surgical instrument is disclosed.
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