Temperature compensation circuit and method for position sensors

Details Temperature compensation circuit and method for position sensors Temperature compensation circuit and method for position sensors

1984-03-02

1986-12-09

Caldwell, Sr., John W.

Communications: electrical

Continuously variable indicating

With particular transmitter

374172, 34087004, G08C 1500, G08C 1506

Patent

active

046283161

ABSTRACT:
A circuit and method to compensate for thermal effects on potentionmeter based sensors by presenting two input signals at different times to a comparator; the first utilizing one leg of the potentiometer and the second utilizing both legs. The comparator output will change states after receiving each input signal. The time periods between the receipt of the input signal and the outputs' change of state are stored.
The quotient of the time periods cancels out most of the thermal effects on the potentiometer and is still a representative of the original potentiometer signal.

REFERENCES:
patent: 2886780 (1959-05-01), Schauffler
patent: 2905385 (1959-09-01), Larse
patent: 3633191 (1972-01-01), Engelhardt
patent: 3636449 (1972-01-01), Partridge
patent: 4205327 (1980-05-01), Dahlke
patent: 4294116 (1981-10-01), Yamamura
patent: 4478527 (1984-10-01), Mergner

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