Patent ID: 7079936

Claim:
An apparatus for sampling a sensor signal indicative of physical quantity related to a target based on a pulse signal whose pulse appears each time a rotating shaft rotates at a predetermined angle, the apparatus comprising: a timing signal outputting unit outputting a timing signal every time interval, the time interval being shorter than a pulse time interval of the pulse signal; a first storage unit configured to store first information relative to the pulse time interval of the pulse signal; a second storage unit configured to: sample a value of the sensor signal each time the timing signal is outputted, and store the sampled values so that the sampled values are associated with pieces of second information, respectively, each of the pieces of second information being relative to each of sampled timings of the values; and a calculating unit configured to calculate a rotation angle of the rotation shaft corresponding to each of the values of the sensor signal based on a relationship between the first information and the pieces of second information.