Magnetic speed, direction, and/or movement extent sensor

Details Magnetic speed, direction, and/or movement extent sensor Magnetic speed, direction, and/or movement extent sensor

2007-02-22

2010-11-16

Aurora, Reena (Department: 2858)

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

C324S173000, C324S165000, C324S207210, C324S252000

Reexamination Certificate

active

07834616

ABSTRACT:
A first magnetic sensor is formed on a semiconductor substrate, and the first magnetic sensor produces a first output signal in response to movement of a multi-pole magnet. A second magnetic sensor is formed on the semiconductor substrate so as to be intertwined with the first magnetic sensor and so as to be at a predetermined angle with respect to the first magnetic sensor. The second magnetic sensor produces a second output signal in response to movement of the multi-pole magnet. The predetermined angle is between 0° and 180° exclusive, and the predetermined angle is sufficient to produce a difference in phase between the first and second output signals. An output signal converter converts the first and second output signals to a linear signal.

REFERENCES:
patent: 2008/0180089 (2008-07-01), Stolfus et al.
patent: WO 2004/113928 (2004-12-01), None
patent: WO 2006/101981 (2006-09-01), None
Klaus Dietmayer et al., “Contactless Angle Measurement using KMZ41 and UZZ9000”, Philips Semiconductors, Application Note AN98097, Dec. 16, 1998, pp. 1-52.
NXP founded by Philips, KMZ41 Magnetic field sensor—Product data sheet, Rev. 05—Nov. 27 2006, pp. 1-10.
D. Wang et al., “360 Degree Angle Sensor Using Spin Valve Materials with SAF Structure”, Feb. 7, 2005, pp. 1-3.
NVE Corporation—“AA and AB-Series Analog Sensors”, pp. 12-27.

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