| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a semiconductor chip which can detect the continuous change of a magnetic field as a highly accurate digital value and can provide the value at low cost. <P>SOLUTION: A magnetic sensor having an MR element comprises; an MR oscillator in which an oscillation period changes corresponding to the intensity of an external magnetic field; a fixed oscillator oscillating with a fixed oscillation period; and an integrator for counting a square wave output by the MR oscillator based on a reset signal output by the fixed oscillator and outputting the wave as a digital value. The MR oscillator, the fixed oscillator and the integrator of the magnetic sensor are formed into one semiconductor chip. <P>COPYRIGHT: (C)2012,JPO&INPIT |
