Hall sensor

Patent metadata

Field	Value
Publication number	US-9851419-B2
Application number	US-201514715931-A
Country	US
Kind code	B2
Filing date	May 19, 2015
Priority date	May 19, 2014
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

A Hall sensor including multiple Hall elements which have a first terminal contact and a second terminal contact and a third terminal contact, the multiple Hall elements being electrically connected in series. The first terminal contacts and the third terminal contacts of the individual Hall elements are connected to each other, and the second terminal contacts of the Hall elements are supply voltage terminals or as Hall voltage taps. A beginning of a first branch being electrically connected in series to an end of a second branch, in such a way that the direction of the current flow through the Hall elements of the first branch is counter to the direction of the current flow through the Hall elements of the second branch.

First claim

What is claimed is:

1. A Hall sensor having a plurality of Hall elements, . . . wherein the first and second branches are electrically connected in series, the first end of the first branch being electrically connected in series to the second beginning of the second branch, and the first beginning of the first branch being electrically connected in series to the second end of the second branch such that a first direction of current flow through the Hall elements of the first branch is counter to a second direction of current flow through the Hall elements of the second branch so that a vector product J 1 ×B=−(J 2 ×B) is fulfilled, where J 1 is the current density vector in the Hall elements of the first branch and J 2 is the current density vector in the Hall elements of the second branch and B is the vector of an applied magnetic field, and wherein at least four Hall voltage taps are provided, two of the Hall voltage taps being arranged in the first branch and two of the Hall voltage taps being arranged in the second branch and the Hall voltage taps being designed as middle contacts.

2. The Hall sensor according to claim 1 , wherein the first branch and the second branch are arranged along a shared straight line or along multiple different straight lines, the multiple straight lines being essentially parallel to each other.

3. The Hall sensor according to claim 1 , wherein one of the supply voltage terminals or both supply voltage terminals is/are provided between two Hall elements.

4. The Hall sensor according to claim 1 , wherein a first set of middle contacts having exactly two middle contacts of the Hall elements connected to a first differential amplifier, and a second set of middle contacts having exactly two middle contacts of the Hall elements connected to a second differential amplifier, and wherein exactly one of the two middle contacts of the first set is from the first branch and exactly one of the two middle contacts of the second set is from the second branch.

5. The Hall sensor according to claim 4 , wherein one of the supply voltage terminals is provided between the middle terminal contacts connected to the first differential amplifier or one of the supply voltage terminals is provided between the middle terminal contacts connected to the second differential amplifier.

6. The Hall sensor according to claim 1 , wherein the number of Hall voltage taps is in a range between 6 to 18.

7. The Hall sensor according to claim 1 , wherein the first portion of the plurality of Hall elements in the first branch is of a same number as the second portion of the plurality of Hall elements in the second branch.

8. The Hall sensor according to claim 1 , wherein an integrated multiplexer circuit arrangement is provided for carrying out a spinning current method, and wherein the circuit arrangement and the Hall elements are monolithically integrated into a shared semiconductor body.

9. The Hall sensor according to claim 1 , wherein the first terminal contacts and the third terminal contacts are arranged symmetrically around the second terminal contacts.

10. The Hall sensor according to claim 1 , wherein the Hall elements have identical structure.

11. The Hall sensor according to claim 1 , wherein the Hall elements are vertical Hall elements.

12. The Hall sensor according to claim 1 , wherein the Hall elements are arranged in a first triplet in the first branch and in a second triplet in a second branch and in a third triplet in a third branch and in a fourth triplet in a fourth branch, and wherein the first triplet and the second triplet measure a first component of a magnetic field, and the third triplet and the fourth triplet measure a second component of the magnetic field, and wherein the first component of the magnetic field and the second component of the magnetic field are substantially perpendicularly to each other.

13. The Hall sensor according to claim 12 , wherein the four branches are arranged symmetrically around a common center of gravity, and wherein each of the branches has a same distance from the common center of gravity.

14. The Hall sensor according to claim 1 , wherein a total Hall voltage results from the sum of Hall voltage differences, wherein each Hall voltage difference results from a voltage difference between the Hall voltage at one of the middle contacts of a Hall element of the first branch and the Hall voltage at one of the middle contacts of a Hall element of the second branch.

Assignees

• Micronas Gmbh
• Tdk-Micronas Gmbh

Inventors

• Vecchi Maria-Cristina
• Cornils Martin

Classifications

• G01R33/07 Primary

  Hall effect devices · CPC title

• G01R33/077 Primary

  Vertical Hall-effect devices · CPC title

• H01L43/06

  Electricity · mapped topic

• H10N52/00

  Hall-effect devices (integrated devices or assemblies of multiple devices H10N59/00) · CPC title