Title :
Frequency control of ultrasonic transducers
Author :
Clarke, Roger ; Midgley, D. ; Weston, C.R.
Author_Institution :
University of Hull, Department of Electronic Engineering, Kingston upon Hull, UK
Abstract :
A new method using phase-locked loops is based on extracting a second harmonic from the electrical input to a mechanical vibrator, for maintaining maximum output during sudden changes of load or temperature. This eliminates the tendency of such systems to jump in frequency to an unwanted mode of vibration.
Keywords :
frequency control; phase-locked loops; ultrasonic transducers; mechanical vibrator; phase-locked loops; second harmonic; ultrasonic transducers;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19820465
