An ultrasonic surgical system utilizes a digital control system to generate ultrasonic drive current for transducers that are located in a hand piece and are attached to a surgical scalpel or blade so as to vibrate the blade in response to the current. The digital control includes a digital signal processor...http://www.google.de/patents/US7476233?utm_source=gb-gplus-sharePatent US7476233 - Ultrasonic surgical system within digital control
