NASA NTRS · 19630000089
Frequency-shift-keyer circuit improves PCM conversion for radio transmission
Abstract
A data logic circuit employing a fixed frequency, square-wave oscillator and flip-flop gates allows for the shifting from one frequency to the other at the end of a whole number of cycles of one shift frequency and at the beginning of a cycle of the second shift frequency.
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Mikszan, D. P.. 1964-06-01. Frequency-shift-keyer circuit improves PCM conversion for radio transmission. https://ntrs.nasa.gov/citations/19630000089
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