HF surgery device

Details HF surgery device HF surgery device

1991-03-12

1992-12-01

Cohen, Lee S.

Surgery

Instruments

Electrical application

A61B 1739

Patent

active

051676605

ABSTRACT:
A HF surgery device had a microprocessor and a comparator which in combination generate a control signal which acts on a rectified operating voltage, which drive a HF generator. The HF generator can be modulated with a modulation signal. In order to automatically maintain the effective output power at a constant level in the event of a modulation of the HF generator, the microprocessor forms a reference value from the modulation signal and from a prescribed setting signal for setting a HF output power. The reference value is compared to the operating voltage in the comparator for forming the control signal.

REFERENCES:
patent: 3812858 (1974-05-01), Oringer
patent: 4574801 (1986-03-01), Manes
patent: 4590934 (1986-05-01), Malis et al.
patent: 4658819 (1987-04-01), Harris et al.
patent: 4658820 (1987-04-01), Klicek
patent: 4739759 (1988-04-01), Rexroth
patent: 4961047 (1990-10-01), Carder
patent: 4961739 (1990-10-01), Thompson
patent: 4969885 (1990-11-01), Farin

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