| 摘要 |
In a video disc player, a stylus arm having a track-following stylus at one end has its other end secured to an arm cage by a compliant member. The arm cage is translated along a path disposed radially to the disc record during playback. Pickup circuits are employed to sense the variations in a signal representative capacitance. The capacitance is formed between an electrode, incorporated in the pickup stylus, and conductive material, disposed in the record, to recover prerecorded information from a spiral track disposed on the record.
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