Decoder for a frequency-keyed signal, particularly an FSK-video text signal
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United States of America Patent
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Mar 10, 1987
Grant Date -
N/A
app pub date -
Jun 20, 1984
filing date -
Jul 6, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Decoder for a frequency keyed signal, particularly an FSK videotext signal. To avoid isochronous distortions, precise matching of the decoder is necessary. Due to the provision of a additional AFC circuit (11) to regulate the natural frequency of the VCO (5) in the PLL loop (3-5) of the decoder, such matching is no longer required.
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