| 摘要 |
<p>In a defect compensation system for a video disc player, stretched versions of defect indication pulses are obtained in a switching control signal generator employing an envelope detector, and a comparator referencing the detector output against a selected threshold voltage. A pair of complementary outputs developed by the comparator are applied to the bases of a pair of serially disposed transistors in respective normal and substitution signal channels, driving one to cutoff and the other to inverted mode saturation, or vice versa.</p> |
