Electricity: measuring and testing – Magnetic – Displacement
Reexamination Certificate
2008-04-01
2008-04-01
LeDynh, Bot (Department: 2862)
Electricity: measuring and testing
Magnetic
Displacement
C324S251000, C324S244000, C324S244100
Reexamination Certificate
active
11091363
ABSTRACT:
The device according to the present invention comprises at least one magnetic field generating element, at least one magneto-resistor and at least one resistance-to-current converter generating a current signal dependent on the resistance value of said at least one magneto-resistor. According to the preferred embodiment of the invention four magneto-resistors are used. A plurality of signals dependent on the ratios of the resistance values of said magneto-resistors are generated, the signals being in different phases. The mutual equality of a predetermined pair of the signals and/or the linear combinations thereof is realized only at predetermined relative positions. The relative position of the movable object is determined by counting the number of such predetermined relative positions passed during the movement of the movable object.
REFERENCES:
patent: 5430375 (1995-07-01), Inoue et al.
patent: 5587846 (1996-12-01), Miyano et al.
patent: 2005/0073777 (2005-04-01), Hasegawa et al.
JP Abstract 2000356733 (Sony Corp., Dec. 26, 2000).
JP Abstract 2000356504 (Sony Corp., Dec. 26, 2000).
LeDynh Bot
Nokia Corporation
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