Sampled data vertical detail signal processor
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United States of America Patent
Stats
-
Dec 10, 1985
Grant Date -
N/A
app pub date -
Nov 28, 1983
filing date -
Nov 28, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a television receiver, apparatus for non-linearly processing a vertical detail signal includes first and second cascaded amplifiers which exhibit linear and limiting regions for processing a vertical detail signal. A first keyed sample and hold circuit provides detail signal amplitude samples to the first amplifier. A second keyed sample and hold circuit provides amplitude samples of sampled detail signals from the output of the first amplifier, to the second amplifier. The sampling circuits operate at different times such that the second sampling circuit is operative in a sampling state at times when the first sampling network is inoperative and exhibits a holding state. Output detail signals from the first and second amplifiers are combined with a linear version of the vertical detail signal to produce a combined, output vertical detail signal manifesting signal coring, amplification, and paring (attenuation) over selected amplitude ranges.
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