| 摘要 |
<p>A digital rotation detecting apparatus of the invention, which is adapted to detect a phase angle .THETA.r of a resolver by using a multiple frequency clock of the excitation frequency for the resolver and a clock of a voltage control oscillator, is detectable of an instantaneous value of the phase angle .THETA.r at a desired time without delay, is also detectable directly of the rotational speed, and requires no low frequency excitation because the excitation frequency for the resolver needs only to be constant.</p> |
