Video image blanking signal generator
A video monitor includes apparatus for generating a horizontal blanking pulse accurately timed with respect to a horizontal image retrace interval. The leading edge of the blanking pulse is derived from a differentiated horizontal oscillator signal which is applied to one input of a gate having a th...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A video monitor includes apparatus for generating a horizontal blanking pulse accurately timed with respect to a horizontal image retrace interval. The leading edge of the blanking pulse is derived from a differentiated horizontal oscillator signal which is applied to one input of a gate having a threshold operating level. The lagging edge of the blanking pulse is generated when the amplitude of a horizontal flyback pulse applied to another input of the gate falls below the gate threshold level. |
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