| 摘要 |
A signal processing apparatus which computes a position or angle of a target object based on a first phase signal (A), a first reversed phase signal (A′) having a phase opposite to that of the first phase signal (A), a second phase signal (B) having a phase different from that of the first phase signal (A), and a second reversed phase signal (B′) having a phase opposite to that of the second phase signal (B) which are provided by a detecting apparatus that detects the position or angle of the target object, comprises a first computing unit which computes (A−A′)/(A+A′) as a cosine signal and (B−B′)/(B+B′) as a sine signal, and a second computing unit which computes the position or angle of the target object based on the cosine signal and the sine signal.
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