Sensor output compensation circuit

Details Sensor output compensation circuit Sensor output compensation circuit

1998-09-29

2000-11-28

Lam, Tuan T.

Miscellaneous active electrical nonlinear devices, circuits, and

External effect

Temperature

327362, H03K 1778

Patent

active

061540870

ABSTRACT:
A sensor drive unit drives a sensor with an electric current. A differential current generation unit outputs a current which changes with a temperature. A compensation current output unit includes a plurality of current generation circuits. Each current generation circuit generates a current proportional to a current output from the differential current generation unit. Each current generation circuit has a transistor switch. Each transistor switch is controlled for its ON/OFF state according to input from terminals Ts0, Ts1, . . . The information input to the terminals Ts0, Ts1, . . . is stored in the memory. The compensation current output unit adds the output from the current generation circuits corresponding to the transistor switches in the ON state, and outputs the result as a sensitivity compensation current Its. The sensitivity compensation current Its is applied to the sensor.

REFERENCES:
patent: 5197334 (1993-03-01), Guziak
patent: 5604468 (1997-02-01), Gillig

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