GMR sensor element and its use

US7312609B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Peter Schmollngruber · Aidlingen, DE
• Ingo Herrmann · Friolzheim, DE
• Henrik Siegle · Leonberg, DE
• Hartmut Kittel · Diez, DE
• Paul Farber · Stuttgart, DE
• Ulrich May · Rutesheim, DE

Key dates

• Filing date: Jun 27, 2003
• Grant date: Dec 25, 2007
• Expiry date: Jun 27, 2023

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01L2820/041
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A GMR sensor element is proposed, having a rotationally symmetrical positioning of especially eight GMR resistor elements which are connected to each other to form two Wheatstone's full bridges. This GMR sensor element is especially suitable for use in an angle sensor for the detection of the absolute position of the camshaft or the crankshaft in a motor vehicle, particularly in the case of a camshaft-free engine having electrical or electrohydraulic valve timing, of a motor position of an electrically commutated motor, or of detection of a windshield wiper position, or in the steering angle sensor system in motor vehicles.