Method and apparatus for sensing and maintaining oscillations in an oscillating system
First Claim
1. A method for delivering energy to an oscillatory system in a signal transmitter to maintain said system in a state of oscillation, a component of the oscillatory system that affects the oscillation frequency of the system being influenced by the magnitude of a measured condition which magnitude is to be transmitted by the signal transmitter, said method comprising sensing the oscillatory state of the system through a signal path, and delivering energy to said system through substantially the same signal path, said energy being delivered in the form of pulses at time intervals longer than a whole period of oscillation of said system to maintain said system in a state of oscillation.
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Abstract
A method and apparatus for delivering energy to an oscillatory system in a signal transmitter to maintain the system in a state of oscillation. A component of the oscillatory system that affects the oscillation frequency is influenced by the magnitude of a measured condition which is to be transmitted by the signal transmitter. The oscillatory state of the system is sensed through a signal path, and energy is delivered to the system through substantially the same signal path, said energy being delivered in the form of pulses at time intervals longer than a whole period of oscillation of the system to maintain the system in a state of oscillation.
21 Citations
11 Claims
- 1. A method for delivering energy to an oscillatory system in a signal transmitter to maintain said system in a state of oscillation, a component of the oscillatory system that affects the oscillation frequency of the system being influenced by the magnitude of a measured condition which magnitude is to be transmitted by the signal transmitter, said method comprising sensing the oscillatory state of the system through a signal path, and delivering energy to said system through substantially the same signal path, said energy being delivered in the form of pulses at time intervals longer than a whole period of oscillation of said system to maintain said system in a state of oscillation.
- 5. A signal transmitter comprising an oscillatory system, means for affecting the oscillation frequency of said system in response to influence by the magnitude of a measured condition which magnitude is to be transmitted, means for sensing the oscillatory state of the system, and means for delivering energy to said system, said sensing means and said energy delivery means each being connected to said oscillatory system by means of substantially the same signal path, said energy delivery means comprising a pulse generator controlled by a control means to deliver said energy in the form of pulses at time intervals longer than a whole period of oscillation in said system to maintain said system in a state of oscillation.
Specification