DETECTION AND MAINTENANCE OF OSCILLATIONS

摘要

A method and apparatus for sensing the oscillating state of an oscillating system in a transmitter and for delivering energy to the oscillating system for maintaining the oscillation in the oscillating system. In order to measure a function, such as pressure or change of length, at least one frequency determinative parameter in the oscillating system is designed to be reacted upon by the selected function and a signal representative of the change in frequency is sensed and measured. The sensing of the oscillations is effected along the same signal path as that used to deliver the necessary energy to maintain the oscillation in the system. The oscillating system may be either mechanical or electrical.