Sensor module

A sensor module comprising:

• a first physical quantity sensor configured to detect a physical quantity using a first axis as a detection axis and output a first measured signal whose frequency changes according to a magnitude of the physical quantity;
• a second physical quantity sensor configured to detect a physical quantity using a second axis in a direction opposite to the first axis as a detection axis and output a second measured signal whose frequency changes according to a magnitude of the physical quantity;
• a reference period signal generation unit configured to output a reference period signal;
• a first count unit configured to count, in synchronization with one of the first measured signal and the reference period signal, a time event of the other of the first measured signal and the reference period signal to generate a first count value;
• a second count unit configured to count, in synchronization with one of the second measured signal and the reference period signal, a time event of the other of the second measured signal and the reference period signal to generate a second count value;
• a first filter configured to receive the first count value and output a third count value;
• a second filter configured to receive the second count value and output a fourth count value;
• and
• a filter unit configured to output a measurement value based on a difference between the third count value and the fourth count value.