Noncontact position sensor

A non-contact position sensor comprising:

• a magnet having a pole surface;
• first to third magnetoresistive elements arranged on a line extending in a predetermined direction on the pole surface of the magnet with predetermined intervals, the first to third magnetoresistive element being connected serially between a power supply and a ground, the first magnetoresistive element being connected to the second magnetoresistive element at a first node, the second magnetoresistive element being connected to the third magnetoresistive element at a second node;
• a first voltage divider circuit including two first fixed resistors connected serially to each other at a third node;
• a first comparator for comparing a potential of the first node with a potential of the third node, and for outputting a high level signal and a low level signal based on a result of comparison;
• a second comparator for comparing a potential of the second node with a fixed potential and for outputting a high level signal and a low level signal based on a result of comparison;
• a digital/analog converter for converting a digital signal including a signal output from the first comparator and a signal output from the second comparator into an analog signal;
• and
• an object displaceable in the predetermined direction, the object being made of magnetic material, the object including
• a projection that can the first to third magnetoresistive elements, and
• a shaft connected to the projection, the shaft being located away from the pole surface by a distance longer than a distance between the projection and the pole surface of the magnet.