Electrosurgical unit

Details Electrosurgical unit Electrosurgical unit

1984-02-29

1986-10-21

Cohen, Lee S.

Surgery

Truss

Pad

12830317, A61B 1739

Patent

active

046179275

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.

REFERENCES:
patent: 3594672 (1971-07-01), Frankel
patent: 3658067 (1972-04-01), Bross
patent: 3952748 (1976-04-01), Kaliher et al.
patent: 4030501 (1977-06-01), Archibald
patent: 4188927 (1980-02-01), Harris
patent: 4429694 (1984-02-01), McGreevy
patent: 4498475 (1985-02-01), Schneiderman
Markus, Modern Electronic Circuits Reference Manual, (McGraw Hill 1980).

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