MAGNETIC SENSING DEVICE AND BILL VALIDATOR

摘要

To obtain a magnetic sensing device in which a high amplification factor can be obtained and magnetic sensing can be performed without being affected by offset voltage, and a bill validator provided with same. A magnetic sensing device (101) provided with: a magnetic sensor (1) provided with a resistor divider including a magnetic resistance element (R1); an AC amplification circuit (20) for performing AC amplification on the output signal from the magnetic sensor (1); an integration circuit (30) for integrating the output signal from the AC amplification circuit (20); and a differential amplification circuit (40) for performing differential amplification on the output signal from the AC amplification circuit (20) and the output signal from the integration circuit (30).