| 摘要 |
The circuit generates a rectifier signal with a vertical synchronization signal in order to display a certain size of the cross hatched pattern on the screen without any relation to the input picture signal mode. The circuit includes an edge detector, a horizontal counter, a divider, a latch, a period counter, a comparator, and a two-step divider. It prevents an influence due to the display information loss along with an insensibility to the graphic size variation.
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