Phase detection circuit, resolver/digital converter using...

Electricity: motive power systems – Induction motor systems – Primary circuit control

Reexamination Certificate

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Details

C318S607000, C341S112000, C341S116000

Reexamination Certificate

active

07456603

ABSTRACT:
A small-sized and low-cost phase detection circuit which has improved noise immunity. The phase detection circuit comprises a multiplier for multiplying an input signal by a reference signal and outputting a first signal, an integration circuit for integrating the first signal and outputting a second signal, a phase estimation circuit for estimating phase information based on the second signal, and a reference signal generation circuit for generating the reference signal based on the estimated phase information. Since the phase is detected based on information representing an entire waveform, the influence of local noise can be diluted and noise immunity can be improved.

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European Search Report dated Nov. 2, 2006 (Eleven (11) pages).

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