| 摘要 |
An apparatus for generating a sensing signal from a generally periodic multi-phase AC signal is set forth. The apparatus utilizes a plurality of integrator circuits, a single integrator circuit being respectively associated with each phase of the AC signal. The integrator circuits each generate an integrated signal from the respective phase of the AC signal by integrating the respective phase during a time period between sloping transitions of the respective phase. A reset circuit is respectively associated with each integrator circuit for resetting each integrator circuit at the sloping transitions of the respective phase. The integrated outputs are summed by a summing circuit to form the sensing signal.
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