Digitizing circuit for demodulated digital data signals
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United States of America Patent
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Jun 11, 1991
Grant Date -
N/A
app pub date -
Jun 21, 1990
filing date -
Jun 23, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The apparatus is for digitizing demodulated frequency shift key modulated data signals, and comprises a differentiating circuit arranged to receive the demodulated data signal, and produce differentiated pulses at an output thereof. First and second comparators are arranged to receive the differentiated pulses, and compare the pulses with respective reference voltages to generate output pulses when pulses above and below the respective reference voltages are detected. The outputs of the comparators are connected to the set and reset inputs respectively of a flip-flop, causing a digitized form of the input demodulated signal to be generated at an output of the flip-flop.
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