Voltage signal converter circuit and motor

A voltage signal converter circuit arranged to receive, from a magnetoresistive sensor arranged to sense a magnetic field generated by a magnet having a plurality of magnetic poles, a sensor voltage signal in accordance with a variation in the magnetic field due to a variation in a relative position between the magnet and the magnetoresistive sensor to convert the sensor voltage signal to a rectangular wave voltage signal, the voltage signal converter circuit comprising:

• a peak hold circuit arranged to adopt a maximum of a voltage value of the sensor voltage signal input from the magnetoresistive sensor and output a peak voltage signal having a voltage value equal to the maximum;
• a bottom hold circuit arranged to adopt a minimum of the voltage value of the sensor voltage signal input from the magnetoresistive sensor and output a bottom voltage signal having a voltage value equal to the minimum;
• an intermediate voltage signal generator circuit arranged to output an intermediate voltage signal having a voltage value equal to an average between the voltage value of the peak voltage signal input from the peak hold circuit and the voltage value of the bottom voltage signal input from the bottom hold circuit;
• and
• a rectangular wave voltage signal generator circuit arranged to output the rectangular wave voltage signal in accordance with a magnitude correlation between the voltage value of the sensor voltage signal input from the magnetoresistive sensor and the voltage value of the intermediate voltage signal input from the intermediate voltage signal generator circuit.