专利名称：VTR TRACKING CORRECTION DEVICE 发明人：HASHIMOTO HIROSHI遗嘱怎么写范文
英语角活动策划>广西桂林市申请号：JP24709089青豆虾仁的做法
申请日：19890922
公开号：JPH03113769A
公开日：
心动瞬间
19910515
乌兰布通
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摘要：PURPOSE:To obtain a stable TV picture free from noi by detecting pha error voltage without using a tracking regulator, and correcting tracking on the basis of it. CONSTITUTION:The envelope of an FM video image reproduced from a head for a video signal and the envelope of an FM sound signal reproduced by the head for the sound signal are detected 6, 9. The detected signals are quantized by A/D conversion circuits 7, 10, and are sampled more than three times, at least, in one scanning, and the minimum value of the sampling signal and sampling data held in a microprocessor 3 are compared with each other. The pul width of a multivibrator 2 of a pha regulation circuit is changed by small data bad on the result of comparison, and pha difference between the pul width and CLT is detected as the pha error voltage by a pha-voltage conversion circuit 1. The pha of a capstan motor is controlled by this pha error voltage.
申请人：FUJITSU GENERAL LTD
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