Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1986-09-29
1987-11-10
Heyman, John S.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307309, 307310, 330 6, H01H 3600, H01L 4306
Patent
active
047059648
ABSTRACT:
A silicon integrated circuit has a Hall-element, a differential amplifier and a Schmitt trigger circuit connected in tandem to form a Hall switch. It is demonstrated that only one set of component parameters, e.g. resistor values, exists that provides an optimally smooth temperature coefficient (TC) of Hall-switch operate-point. It is further shown that by adding an adjustable resistor from the Schmitt trigger circuit ground, which resistor has the same resistivity and TC as does the Hall element, adjustment of the operate-point to another particular operate-point is accomplished without substantially altering the above-noted optimum TC. Operate-point adjustment, e.g. by blowing fuse links, during manufacturing, at probe, can be effected to yield a narrow distribution of operate-points conforming to a customer specification.
REFERENCES:
patent: 3671767 (1972-06-01), Davis
patent: 3816766 (1974-06-01), Anselmo et al.
patent: 3930304 (1976-01-01), Keller et al.
patent: 4134030 (1979-01-01), Pace
patent: 4210996 (1980-07-01), Amemiya et al.
patent: 4218626 (1980-08-01), Fukuda et al.
patent: 4296410 (1981-10-01), Higgs et al.
patent: 4443716 (1984-04-01), Avery
Heyman John S.
Sprague Electric Company
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