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US 5,290,283 AGranted
Power supply apparatus for electrosurgical unit including electrosurgical-current waveform data storage
AssigneeKabushiki Kaisha Toshiba
InventorMasao Suda
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Abstract
In an electrosurgical power supply apparatus combined with an electronic endoscope system, there is provided an electrosurgical signal generator. The electrosurgical signal generator includes PROM for previously storing data representative of electrosurgical high-frequency currents. In response to a selection signal of an electrosurgical operation mode, the data is read out from PROM to produce the electrosurgical high-frequency current corresponding to the selected electrosurgical operation mode.
Claims3
An electrosurgical power supply apparatus comprising:
- an electrosurgical signal generator for generating an electrosurgical signal used to perform an electrosurgical operation, said electrosurgical signal generator including at least:
- first storage means for previously storing first electrosurgical signal data and for selectively outputting a first gate pulse signal whose duty ratio is variable in response to a power setting pulse;
- second storage means for previously storing second electrosurgical signal data and for selectively outputting a second gate pulse signal upon receipt of a clock signal;
- and
- AND gate means for AND-gating said first gate pulse signal and said second gate pulse signal, thereby producing an electrosurgical high-frequency signal having a waveform suitable to a selected electrosurgical operation mode.
2 more elements
Dependencies are inferred from the claim text.