Patent ID: 11953565
Assignee: ALLEGRO MICROSYSTEMS, LLC
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 11:
12. A magnetic-field sensor comprising bridge circuitry, the bridge circuitry comprising:
a first magnetoresistance (MR) element;
a second MR element connected in series with the first MR element at a first node;
a third MR element connected in series with the second MR element at a second node;
a fourth MR element connected in series with the third MR element at a third node;
a fifth MR element;
a sixth MR element connected in series with the fifth MR element at a fourth node;
a seventh MR element connected in series with the sixth MR element at a fifth node;
an eighth MR element connected in series with the seventh MR element at a sixth node;
a first switch connected at one end to a supply voltage and connected at the other end to the first MR element and the fifth MR element;
a second switch connected at one end to the supply voltage and connected at the other end to the first node;
a third switch connected to the fifth node at one end and connected at the other end to a first output terminal of the bridge circuitry;
a fourth switch connected to the fourth node at one end and connected at the other end to the first output terminal;
a fifth switch connected to the second node at one end and connected at the other end to a second output terminal of the bridge circuitry;
a sixth switch connected at one end to the third node and the other end to the second output terminal;
a seventh switch connected at one end to ground and connected at the other end to the fourth MR element and the eight MR element; and
an eighth switch connected at one end to ground and connected at the other end to the sixth node.