| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem in a conventional removal technique that it is necessary to eliminate influence of an offset voltage contained in an element in a four terminal type magnetism detection element where, when a current is fed between a first terminal and a third terminal, a voltage proportional to a magnetic flux density is output between a second terminal and a fourth terminal, and a current is fed between the third terminal and the first terminal, a voltage proportional to a magnetic flux density is output between a third terminal and a first terminal, and delay may occur in the signal processing.SOLUTION: The third terminal and fourth terminal having a same polarity of an offset voltage while having different voltages proportional to the magnetic flux density are alternately connected with a first input of a differential amplifier. Similarly the first terminal and second terminal having a same polarity of an offset voltage while having different voltages proportional to the magnetic flux density are alternately connected with a second input of the differential amplifier. The offset voltage is of a DC component, thereby failing to affect the amplified voltage. |
