| 摘要 |
SYSTEM AND METHOD FOR IMPROVED START-UP OF SELF-OSCILLATING ELECTRO-MECHANICAL SURGICAL DEVICES An oscillating circuit (200) for determining a resonant frequency of an electro mechanical oscillating device (230) and for driving the electro-mechanical oscillating device at the determined resonant frequency includes a driving circuit and a start-up, impetus injection circuit (270). The driving circuit is configured to receive one or more reference signals and further configured to provide a driving signal related to the reference signals to the electro mechanical oscillating device. The start-up, impetus injection circuit (270) is operably coupled to the electro-mechanical oscillating device (230) and configured to selectively provide a start-up excitation signal to the electro-mechanical oscillation device (230). The start-up, impetus injection circuit (270) is activated upon start-up of the oscillating circuit (200) to drive the electro-mechanical oscillation device (230) and the driving circuit determines a resonant frequency by measuring a parameter related to the resonant frequency of the electro-mechanical oscillating device (230). 3455916-1 Control 120 245 Driving Controller Rf Vs V0 Signal OLt + _ C~) -(s) VF n Forward Compensator Oscillator 6 14 Feedback Oscillating Device Out In Conditioned H(s) Feedback Start-up Enable 260- /,-200 270-- Control: out Impetus Injection Signal Input Control 20 345 Driving Input Controller Ref VS V 0 Signal 230 Out +ard G(s) VF Compensator Oscillator T Feedback Oscillating Device Out InI Conditioned H(s) Control Feedback Feedback |
