Circular zig-zag scan video format
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United States of America Patent
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-
Jun 9, 1992
Grant Date -
N/A
app pub date -
Mar 21, 1991
filing date -
Mar 21, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A circular, ziz-zag scan for use with vidicon tubes. A sine wave is generated, rectified and its fourth root extracted. The fourth root, and its inverse, are used to generate horizontal ramp and sync signals. The fourth root is also used to generate a vertical sync signal, and the vertical sync signal, along with the horizontal sync signal, are used to generate the vertical ramp signal. Cathode blanking and preamplifier clamp signals are also obtained from the vertical sync signal.
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