Electrosurgical unit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Oct 21, 1986
Grant Date -
N/A
app pub date -
Feb 29, 1984
filing date -
Feb 29, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electrosurgical unit having a power source, and an amplifier which includes a bipolar transistor and a FET in series with the amplifier load. In cut and blend modes, the power output of the unit is controlled by a variable voltage applied to the base terminal of the bipolar transistor. In coagulation, fulgration, and bipolar modes the power output is controlled by a variable duty cycle voltage applied to the gate terminal of the FET.
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