Hall effect circuit with temperature compensation

Details Hall effect circuit with temperature compensation Hall effect circuit with temperature compensation

1983-05-23

1985-06-04

Beha, Jr., William H.

Electricity: power supply or regulation systems

Output level responsive

Using an impedance as the final control device

307309, 323368, 323907, H03K 1790

Patent

active

045217270

ABSTRACT:
A temperature compensation method and circuit for a Hall element or other element with similar characteristics comprising a pair of current carrying branches, one of which includes a resistor. A pair of transistors in the branches are controlled in unison to control the sum of the currents in the branches in response to current through the element, and controlled differentially to control the relative magnitudes of the currents in the branches in response to the voltage generated by the element. A comparator circuit including an active load in the branches compares the branch currents and provides a switched output signal upon a predetermined relationship between the currents. Switching hysteresis is provided by changing the sum of the currents depending on the state of the output signal.

REFERENCES:
patent: 3250995 (1966-05-01), Kalinowski et al.
patent: 3435332 (1969-03-01), Kurdyla
patent: 3994010 (1976-11-01), Geske
patent: 4134030 (1979-01-01), Pace
patent: 4393317 (1983-07-01), Radziwill
patent: 4443716 (1984-04-01), Avery
Maupin et al., "The Hall Effect in Silicon Circuits", paper presented at The Hall Effect; A Commemorative Symposium, John Hopkins University, (Nov. 13, 1979).
Bolash et al., "Monolithic Hall Cell System, " IBM Tech. Discl. Syst., vol. 21, No. 7, pp. 2717, 2718, Dec. 1978.

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