| 摘要 |
The invention relates to a sensor (10) which includes a magnetic sensor (12) generating a response signal (V) when plunged into an external magnetic field (Bext) creating an external flux (φext) through said sensor. Said sensor includes: a control circuit (14) taking the response signal from the sensor as input and generating a feedback current (iCR) as output; and a conductive wire (16) arranged in the vicinity of the sensor and connected to the output of the control circuit, the wire having the feedback current passing therethrough, the circuit and the conductive wire being such that a magnetic feedback field (BCR) is created in which the flux through the sensor substantially compensates for the external flux at each instant, an output signal of the sensor being made up of the feedback current. |
