Clock-frequency recovery device adapted to high-frequency radiocommunications in disturbed media
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United States of America Patent
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Dec 24, 1985
Grant Date -
N/A
app pub date -
Jul 15, 1983
filing date -
Jul 23, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A clock-frequency recovery device applicable to digital transmission systems for radiocommunications by tropospheric or ionospheric propagation as well as from moving vehicles includes a rectification circuit, a filter circuit, a switching circuit and an output circuit comprising a delay line controlled by a phase-locked oscillator. The input of the output circuit is connected to the output of the filter circuit when the noise level of the transmission is below a predetermined threshold value. The input of the output circuit is connected to its own output when the noise level of the transmission is higher than said threshold value.
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