Magnetic field sensor.

摘要

A magnetic field sensor comprising a magnetic field-sensitive element (1), more specifically a magnetic field-sensitive multi-collector transistor (2), is described. To reduce the offset, the setting of this element is modulated to vary the sensitivity, by varying the voltage at the sources (15 or 19).

A clock generator (25) is in this example connected with source (19) and the sampling circuits (21, 22) and the differential amplifier (23).

In the variation of the output signal of that element (1) in response to the variation in the sensitivity the offset has then been reduced.