05438302 is referenced by 714 patents and cites 15 patents.

In an electrosurgical generator having a self-tuning oscillator which includes a switching device and a resonant output network connected between the switching device and a supply rail, an oscillator feedback circuit feeds to the switching device a switching control pulse signal for separately switching the switching device to its "on" state whilst the voltage across the device is decreasing, the phase of the "on" point being dynamically variable such that the "on" time of the device is adjusted so as to regulate the amplitude of the voltage thereacross. This allows reverse conduction of the switching device to be avoided, giving improved efficiency.

Title
Electrosurgical radiofrequency generator having regulated voltage across switching device
Application Number
8/273496
Publication Number
5438302
Application Date
July 11, 1994
Publication Date
August 1, 1995
Inventor
Colin C O Goble
Penarth
GB
Agent
Fish & Richardson
Assignee
Gyrus Medical
GB
IPC
A61N 1/32
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