Signal conditioning circuit for L/R VDT sensors

Details Signal conditioning circuit for L/R VDT sensors Signal conditioning circuit for L/R VDT sensors

1984-10-01

1986-05-27

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307352, 307494, 328127, 328151, 34087036, H03K 500, H03K 522, G08C 1906

Patent

active

045917957

ABSTRACT:
A highly accurate signal conditioning circuit for use with a linear/rotary variable differential transformer (L/R VDT) operating in a unipolar mode is disclosed. The circuit may be utilized for ratiometric comparison of L/R VDT primary coil peak excitation and L/R VDT secondary coil peak response. Unique peak detectors are used for detecting both primary and secondary peak values. The circuit may include an oscillator having R and C elements in a tank circuit which also includes the L/R VDT primary coil. Offset errors may be determined externally by providing for a momentary shutdown of the oscillator to permit the measurement of DC components to the signal conditioner and excitation DC outputs, by external means.

REFERENCES:
patent: 3600669 (1971-08-01), McClain
patent: 4053849 (1977-10-01), Bower et al.
patent: 4109200 (1978-08-01), McNulty
patent: 4420727 (1983-12-01), Rau

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