Circuit and method of compensating for non-linearities in a sens

Details Circuit and method of compensating for non-linearities in a sens Circuit and method of compensating for non-linearities in a sens

1996-09-30

1998-06-23

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

Exponential

327 4, G06F 7556

Patent

active

057709653

ABSTRACT:
A compensation circuit (106) corrects for nonlinearities in a sensor signal representing the physical state of a sensor (100). A transducer (102) produces a non-linear component in a transducer voltage signal. A voltage-current converter (104) converts the tranducer voltage signal to a transducer current which contains the non-linear component. A compensation circuit (106) squares the transducer current (I.sub.216) and uses a scaling current (I.sub.412) to generate a compensation current (I.sub.408) equal to the non-linear component. The current (I.sub.216) and scaled compensation current (I.sub.408) are summed at a summing junction (418) to produce an output current (I.sub.OUT) which is a substantially linear representation of the physical state of the sensor.

REFERENCES:
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patent: 4585961 (1986-04-01), Daubert
patent: 4800759 (1989-01-01), Hirata et al.
patent: 4883992 (1989-11-01), Koglin et al.
patent: 5107150 (1992-04-01), Kimura
patent: 5146152 (1992-09-01), Jin et al.
patent: 5479092 (1995-12-01), Pigott et al.

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