NASA NTRS · 19730000127
Automatic quadrature control and measuring system
Abstract
Quadrature is separated from amplified signal by use of phase detector, with phase shifter providing appropriate reference. Output of phase detector is further amplified and filtered by dc amplifier. Output of dc amplifier provides signal to neutralize quadrature component of transducer signal.
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Hamlet, J. F.. 1973-05-01. Automatic quadrature control and measuring system. https://ntrs.nasa.gov/citations/19730000127
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