| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an interface circuit which is strong against noise and has low power consumption by automatically adjusting a level of rotation signals and changing a gain of a rotation signal input circuit. <P>SOLUTION: The interface circuit by the present invention has: an automatic adjusting function of automatically adjusting a rotation signal level of rotation signals (K sinθ F(t), K cosθ F(t)) by adjusting an input signal level of primary side signals (F(t)) using first and second rotation signals (K G sinθ F(t), K G cosθ F(t)); and a gain changing function of changing the gain of first and second rotation signal input circuits (110, 111) when inputting the rotation signals (K sinθ F(t), K cosθ F(t)) to a rotation signal processor (50). <P>COPYRIGHT: (C)2013,JPO&INPIT |
