BATTERY-POWERED ELECTROSURGICAL FORCEPS WITH MULTI-TURN SELECTABLE-RATIO TRANSFORMER

摘要

An electrocautery surgical device includes a battery power source and radio-frequency signal generating circuitry electrically coupled to the battery power source and operable to deliver power to an electrosurgical forceps. The radio-frequency signal generating circuitry includes a transformer having a primary winding and a secondary winding. The primary winding includes first and second primary sub- windings. At least one switching component is electrically coupled to the first and second primary sub- windings and is operable to switch between engaging the first primary sub-winding and engaging the second primary sub-winding such that a current flows through the first and/or second primary sub-windings. The first and second primary sub-windings have a different number of turns such that the radio-frequency signal generating circuitry produces a different impedance value depending on which one of the first and second primary sub- windings is engaged.