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A new frequency control method in oscillator and its application to sensor

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2 Author(s)
Kohata, M. ; Fac. of Eng., Tohoku Univ., Sendai, Japan ; Takagi, T.

A structure of an oscillator and its frequency control method are proposed and applied to a sensory system. The structure of the oscillator has two feedback loops, one of which is modulated by a physical value to be measured. The oscillation frequency can be modulated by the amplitude or the phase of the feedback signal. Then this system is a frequency modulation (FM)-type measuring system. The proposed oscillator, whose frequency is controlled by the amplitude of the feedback signal, is applied to a fibre optic snowfall-weight remote sensing system

Published in:

Instrumentation and Measurement Technology Conference, 1991. IMTC-91. Conference Record., 8th IEEE

Date of Conference:

14-16 May 1991