NASA NTRS · 19790000160
Improved reader for magnetically-encoded ID cards
Abstract
Hybrid demodulator in electronic card reader for magnetically encoded identification cards, accommodates variations in insertion speeds, yet is simpler and less expensive than equivalent all-digital circuits.
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Wu, T. T.. 1979-12-01. Improved reader for magnetically-encoded ID cards. https://ntrs.nasa.gov/citations/19790000160
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