Biasing circuit for a magnetic field sensor, and corresponding biasing method

摘要

Described herein is a biasing circuit for a magnetic-field sensor; the magnetic-field sensor is provided with a first detection structure, which generates a first electrical detection quantity as a function of a first component of an external magnetic field, and a second detection structure, which generates a second electrical detection quantity as a function of a second component of an external magnetic field. The biasing circuit electrically supplies the first detection structure and the second detection structure in respective biasing time intervals, at least partially distinct from one another, which preferably do not temporally overlap one other.

主权项

1. A circuit for a magnetic-field sensor that includes a first detection structure configured to detect a first directional component of an external magnetic field and a second detection structure configured to detect a second directional component of said external magnetic field, the circuit comprising:
a biasing circuit configured to electrically supply said first detection structure during a first biasing time interval and to electrically supply said second detection structure during a second biasing time interval, the first and second bias time intervals being at least partially distinct from one another in that the bias circuit is configured to electrically supply said first detection structure without electrically supplying said second detection structure during at least a portion of the first bias time interval and is configured to electrically supply said second detection structure without electrically supplying said first detection structure during at least a portion of the second bias time interval, wherein said biasing circuit is configured to electrically supply a third detection structure of the magnetic field sensor during a third biasing time interval to enable the third detection structure to detect a third directional component of the external magnetic field, the first, second, and third biasing time intervals being at least partially distinct from one another.