NASA NTRS · 19690000311
New passive telemetry system
Abstract
Passive telemetry system enables the monitoring of vital biological functions from living organisms, without external connections or power sources. The FM system, using a phase locked loop technique, keeps the information frequency and powering frequencies separate.
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Visscher, J.. 1969-08-01. New passive telemetry system. https://ntrs.nasa.gov/citations/19690000311
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