The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 04, 2012
Filed:
May. 28, 2008
Pavel Kejik, Ecublens, CH;
Radivoje Popovic, St-Sulpice, CH;
Serge Reymond, Geneva, CH;
Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne, CH;
Abstract
A magnetic field sensor includes a sensing structure having a ring-shaped well, a plurality of contacts of equal size disposed along the ring-shaped well, a circuit having a plurality of electronic switches associated with the contacts of the sensing structure, a logic block for controlling the electronic switches, at least one current source, a voltage measuring device, a timing circuit providing a control signal for controlling the logic and providing a reference signal, wherein the logic block is configured to switch the switches under the control of the control signal so that a predetermined number of contacts of the plurality of contacts form a vertical Hall element supplied with current from the at least one current source and having two contacts connected to the voltage measuring device and circuitry configured to measure a phase shift between the reference signal and an output signal of the voltage measuring device.