Electricity: measuring and testing – Magnetic – Displacement
Patent
1989-09-18
1991-03-26
Snow, Walter E.
Electricity: measuring and testing
Magnetic
Displacement
324262, 318696, G01B 714, G01R 3300, H02P 800
Patent
active
050032615
ABSTRACT:
A rotation angle detection circuit for a step motor providing an up/down control signal for determining positive and negative rotation of the step motor and a mask control signal for determining rotation angle of 15.degree. and 30.degree.. The circuit can correctly detect the rotation angle of the step motor by counting the pulse signals from the up/down control signal and mask control signal. It is thereby useful for application in a system which electrically measures the rotation of the step motor.
REFERENCES:
patent: 3465217 (1969-09-01), Kress
patent: 4520302 (1965-05-01), Hill et al.
patent: 4691153 (1967-09-01), Nishimura
Goldstar Co. Ltd.
Snow Walter E.
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