System and Method for Improved Start-Up of Self-Oscillating Electro-Mechanical Surgical Devices
First Claim
1. An oscillating circuit for determining a resonant frequency of an electro-mechanical oscillating device and for driving the electro-mechanical oscillating device at the determined resonant frequency, the oscillating circuit comprising:
- a driving circuit configured to receive at least one reference signal and further configured to provide a driving signal related to the at least one reference signal to the electro-mechanical oscillating device;
a start-up, impetus injection circuit operably coupled to the electro-mechanical oscillating device, wherein the start-up, impetus injection circuit is configured to selectively provide a start-up excitation signal to the electro-mechanical oscillation device, and wherein the start-up, impetus injection circuit is activated upon start-up of the oscillating circuit to drive the electro-mechanical oscillation device;
an excitation signal generating circuit including a narrowband, pseudo-random noise generator circuit configured to generate the excitation signal within a resonant bandwidth; and
a start-up switch configured to selectively couple the excitation signal generating circuit to the electro-mechanical oscillating device,wherein the driving circuit determines a resonant frequency by measuring a parameter related to the resonant frequency of the electro-mechanical oscillating device.
2 Assignments
0 Petitions
Accused Products
Abstract
An oscillating circuit for determining a resonant frequency of an electro-mechanical oscillating device and for driving the electro-mechanical oscillating device at the determined resonant frequency includes a driving circuit and a start-up, impetus injection circuit. 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 is operably coupled to the electro-mechanical oscillating device and configured to selectively provide a start-up excitation signal to the electro-mechanical oscillation device. The start-up, impetus injection circuit is activated upon start-up of the oscillating circuit to drive the electro-mechanical oscillation device and the driving circuit determines a resonant frequency by measuring a parameter related to the resonant frequency of the electro-mechanical oscillating device.
5 Citations
10 Claims
-
1. An oscillating circuit for determining a resonant frequency of an electro-mechanical oscillating device and for driving the electro-mechanical oscillating device at the determined resonant frequency, the oscillating circuit comprising:
-
a driving circuit configured to receive at least one reference signal and further configured to provide a driving signal related to the at least one reference signal to the electro-mechanical oscillating device; a start-up, impetus injection circuit operably coupled to the electro-mechanical oscillating device, wherein the start-up, impetus injection circuit is configured to selectively provide a start-up excitation signal to the electro-mechanical oscillation device, and wherein the start-up, impetus injection circuit is activated upon start-up of the oscillating circuit to drive the electro-mechanical oscillation device; an excitation signal generating circuit including a narrowband, pseudo-random noise generator circuit configured to generate the excitation signal within a resonant bandwidth; and a start-up switch configured to selectively couple the excitation signal generating circuit to the electro-mechanical oscillating device, wherein the driving circuit determines a resonant frequency by measuring a parameter related to the resonant frequency of the electro-mechanical oscillating device. - View Dependent Claims (2, 3, 4)
-
-
5. A method for starting an electro-mechanical oscillating device, the electro-mechanical oscillating device having a varying resonate frequency, the method comprising the steps of:
-
generating a start-up excitation signal from a pseudo-random noise sequence signal within the resonant bandwidth; driving the electro-mechanical oscillating device with the start-up excitation signal; measuring at least one parameter related to a resonant frequency of the electro-mechanical oscillating device; determining a resonant frequency of the electro-mechanical oscillating device; and driving the electro-mechanical oscillating device at the determined resonant frequency. - View Dependent Claims (6, 7)
-
-
8. A method for starting an electro-mechanical oscillating device, the electro-mechanical oscillating device having a varying resonant frequency, the method comprising the steps of:
-
generating a time-frequency varying start-up excitation signal from a pseudo-random noise sequence signal within the resonant bandwidth by activating a start-up switch coupling a excitation signal generating circuit to the electromechanical oscillating device, wherein the excitation signal generating circuit includes a DC voltage and an energy storage device such that the energy storage device is operatively coupled to the DC voltage source in a first condition and operatively coupled to the start-up switch in a second condition, wherein in the first condition, the DC voltage source charges the energy storage device, and, in the second condition, the energy storage device drives the electro-mechanical oscillating device; applying the time-frequency varying start-up excitation signal to the electro-mechanical oscillating device; driving the electromechanical oscillating device to a position related to a point of maximum amplitude; measuring at least one parameter related to a resonant frequency of the electro-mechanical oscillating device while driving the electro-mechanical oscillating device with the time-frequency varying excitation signal; determining the resonant frequency of the electro-mechanical oscillating device; and driving the electro-mechanical oscillating device at the determined resonant frequency. - View Dependent Claims (9, 10)
-
Specification