Offset correction for sensor with temperature dependent...

Details Offset correction for sensor with temperature dependent... Offset correction for sensor with temperature dependent...

H - Electricity

03

K

328/186, 328/199

H03K 17/90 (2006.01) H03K 17/14 (2006.01)

Patent

CA 1266723

ABSTRACT OF THE INVENTION A Hall effect device with offset compensation in which the output terminals of a Hall effect element formed in an epitaxial layer are connected to a differential current source. The sum of first and second current produced by the source is determined by a resistor formed in the epitaxial layer in which the Hall effect element is formed and which is powered by the same electrical source as the Hall effect element so as to produce a current which tracks the current through the Hall effect element with temperature. The current through the resistor is split by a pair of trimmable temperature insensitive resistors and supplied to a pair of cross-coupled current mirrors which supply the currents to the output terminals of the Hall effect element.

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