Demodulator for television signals with feedback to correlate frames or lines
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United States of America Patent
Stats
-
Mar 31, 1987
Grant Date -
N/A
app pub date -
Sep 17, 1985
filing date -
Jan 17, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A demodulator for television signals includes a feedback loop which incorporates a delay for feeding back a first portion of a modulating signal to be compared with a following portion of the signal. This allows correlation of the modulating signals between the first portion of the signal and the following portion. Such correlation can be applied in feedback type demodulation such as phase-locked loops, to increase the threshold performance of the loop. The circuitry can be applied in normal demodulation circuits to effect a frequency tracking circuit allowing the use of a band pass filter with a narrower band than would be normally allowable.
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Family
International Classification(s)
Cited Art Landscape
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