NASA NTRS · 19780000164
Bit-synchronizer lock detector
Abstract
Circuit measures phase error that exists in phase-locked loop between clock signal recorded in data on magnetic tape and reconstructed clock signal. Circuit presents error as digital word that can be compared with predetermined threshold to indicate lock status. With simple alterations, circuit can also be used as phase detector.
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Huey, D. C., Itri, B. A.. 1978-10-01. Bit-synchronizer lock detector. https://ntrs.nasa.gov/citations/19780000164
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