Rotation detector using differential hall sensor circuitry

Details Rotation detector using differential hall sensor circuitry Rotation detector using differential hall sensor circuitry

1990-08-10

1993-08-31

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

32420725, 324174, G01B 730, G01R 3306, G01P 3487, G01P 3489

Patent

active

052412679

ABSTRACT:
A rotation detector for a magnet wheel which is high-resolution, precise and at the same time only requires the space of a single differential Hall IC, has combined on a single electronic component the circuitry equivalent to at least two differential Hall IC's. The electronic component derives a digital signal sequence that has a frequency twice the frequency of a signal that can be derived from a single differential Hall circuit by coupling the output signals of the differential Hall circuits. Additionally, only three Hall sensors are required to form the difference signals necessary to derive the digital signal sequence by using one Hall sensor as a reference for the remaining two Hall sensors.

REFERENCES:
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patent: 4232451 (1980-11-01), Thomsen
patent: 4283679 (1981-08-01), Ito et al.
patent: 4349814 (1982-09-01), Akehurst
patent: 4361835 (1982-11-01), Nagy
patent: 4533902 (1985-08-01), Baker et al.
patent: 4733177 (1988-03-01), Pawletko
patent: 4737710 (1988-04-01), Van Antwerp et al.
patent: 4739264 (1988-04-01), Kamiya et al.
patent: 4847555 (1989-07-01), Stammer et al.
Siemens Publication: "Differential Hall ICs for Gear Tooth Sensing in Hostile Environments", Sensors, Jan. 1989.
Patent Abstracts of Japan, vol. 9, No. 280 8 Nov. 1985, & JP-A-60 121978 (Sony K.K.) 29 Jun. 1985.

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