Oscillator having resonator coil immersed in a liquid mixture to

Details Oscillator having resonator coil immersed in a liquid mixture to Oscillator having resonator coil immersed in a liquid mixture to

1991-03-12

1992-02-25

Grimm, Siegfried H.

Oscillators

With device responsive to external physical condition

123575, 321167, 324682, 340603, H03B 508, G01N 2700

Patent

active

050917048

ABSTRACT:
An oscillator for use in a fluid detection apparatus for determining the respective percentages of first and second liquids in a mixture disposed within a chamber, including an inductive element immersed in the mixture such that the mixture at least partially determines a value of distributed capacitance exhibited by the element when energized; where the inductive element is a coil acting as a resonant element in an oscillator, and where the oscillator is of the tuned input type such that the coil and its distributed capacitance define a parallel resonant tank circuit which generates an oscillating signal at a resonant frequency of the tank circuit, the resonant frequency being inversely proportional related to the distributed capacitance of the coil.

REFERENCES:
patent: 4751476 (1988-06-01), Meijer
patent: 4915084 (1990-04-01), Gonza

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