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:
Jan. 18, 2011
Filed:
Sep. 10, 2002
Christian Schott, Lussy-sur-Morges, CH;
Radivoje Popovic, St-Sulpice, CH;
Pierre-andre Besse, Ecublens, CH;
Enrico Schurig, Chavannes-pres-Renes, CH;
Christian Schott, Lussy-sur-Morges, CH;
Radivoje Popovic, St-Sulpice, CH;
Pierre-Andre Besse, Ecublens, CH;
Enrico Schurig, Chavannes-pres-Renes, CH;
Melexis Tessenderlo NV, Bevaix, CH;
Abstract
A symmetrical vertical Hall element comprises a well of a first conductivity type that is embedded in a substrate of a second conductivity type and which is contacted by four contacts serving as current and voltage contacts. From the electrical point of view, such a Hall element with four contacts can be regarded as a resistance bridge formed by four resistors Rto Rof the Hall element. From the electrical point of view, the Hall element is then regarded as ideal when the four resistors Rto Rhave the same value. The invention suggests a series of measures in order to electrically balance the resistance bridge. A first measure exists in providing at least one additional resistor. A second measure exists in locally increasing or reducing the electrical conductivity of the well. A third measure exists in providing two Hall elements that are electrically connected in parallel in such a way that their Hall voltages are equidirectional and their offset voltages are largely compensated.