Phase locked loop resolver to digital converter

Details Phase locked loop resolver to digital converter Phase locked loop resolver to digital converter

1975-04-21

1977-03-01

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

318661, H03K 1302

Patent

active

040104630

ABSTRACT:
A resolver-to-digital converter where a signal of predetermined frequency is converted to a given waveform sequence by a logic circuit, band passed filtered, and phase splitted into orthogonal components. These components are fed to operational amplifiers and then into the input windings of a resolver. The outputs of the resolver are fed to a pair of zero crossing differential comparators and then to phase detectors, the outputs of which are summed. The sum of the signals is filtered and is used to regulate a voltage controlled oscillator that pulses a synchronous counter that is fed back to the phase detectors forming a phase-locked loop. The synchronous counter feeds a serial register that is strobed by the output of a zero crossing differential amplifier fed by the compensation windings of the resolver.

REFERENCES:
patent: 3315253 (1967-04-01), Geller
patent: 3555542 (1971-01-01), Guiot
patent: 3634838 (1972-01-01), Granqvist
patent: 3676659 (1972-07-01), Asmussen
patent: 3851330 (1974-11-01), Huber
patent: 3877024 (1975-04-01), Friday
patent: 3878535 (1975-04-01), Twiss
patent: 3898568 (1975-08-01), Huber

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