Phase track controller improvement to reduce loss of lock occurrence

摘要

A system and method for driving ultrasonic transducers and improvements to a phase track controller for reducing loss of lock occurrence is disclosed and described.

主权项

1. A method for anticipating phase lock in a resonant system operating under a track control protocol comprising:
selecting a phase track controller for a drive circuit with a frequency source selector for driving the track control protocol; wherein the frequency source selector also selects an increasing frequency step generator or a decreasing frequency step generator a source of frequency stepping; establishing a phase error threshold for a resonant drive circuit being driven at a predetermined operating point; establishing a step increment for phase correction that corresponds to the resonant drive circuit; establishing a number of steps for the step increment for phase error correction once a measured phase falls outside of a predetermined phase range bounded by a lower edge of the phase band and an upper edge of the phase band; sensing a phase error trend in the phase locked system; suspending the track control protocol for the resonant drive circuit with the frequency source selector; applying the established number steps of the step increment for phase correction via the selected frequency step generator; and sensing phase error correction and reestablishing track control by reinstating the track control protocol.