DIGITAL ROTATION DETECTOR

摘要

The digital rotation detecting appts. detects a phase angle of a resolver by using a multiple frequency clock of the excitation frequency for the resolver and a clock of a voltage control oscillator. The two-phase resolver rotates in association with a rotary body, e.g. a motor. A detector ascertains any phase difference between a two-phase output of a signal generator and the resolver. A loop filter processes the phase difference for proportional-plus-integral-computation.