Method and apparatus for sensing and maintaining oscillations in

Details Method and apparatus for sensing and maintaining oscillations in Method and apparatus for sensing and maintaining oscillations in

1977-01-19

1981-03-17

Grimm, Siegfried H.

Oscillators

With device responsive to external physical condition

331156, 331165, 340562, 340665, 324236, G05D 1902

Patent

active

042570107

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.

REFERENCES:
patent: 3140462 (1964-07-01), Hayes

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