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专利名称：Track jumping method
发明人：FUELDNER, FRIEDRICH,GLEIM, GUENTER申请号：EP90107744.6申请日：19900424公开号：EP0399225A1公开日：19901128
专利附图：
摘要：1. Track jumping method for a track control loop having an optical scanningdevice, in which a sinusoidal track error signal is generated. …2. A CD player is equipped,for example, with a track control loop which passes a light beam along the data tracks ofa CD. For jumping over a number of data tracks, for example in order to search for a
different piece of music, the track control loop is opened, however. By means of acounter and a directional logic, it is determined with the control loop open how manytracks the light beam has crossed. …2. In order to make track jumping possible with thecontrol loop closed, the track control loop (RV) is fed an offset (OF), which is of such amagnitude that the light beam (L1) scanning the data radiates partly on the track (S0) andpartly on the guard track (R1). For jumping over n tracks, the track error signal (TE) isinverted 2n times. The offset (OF) is interrupted again from the track control loop at thelatest after the final inversion of the track error signal. …2. CD players, video-disc players,magnetooptical equipment, DRAW disc players. ……
申请人：DEUTSCHE THOMSON-BRANDT GMBH
地址：HERMANN-SCHWER-STRASSE 3 POSTFACH 1307; D-7730 VILLINGEN-SCHWENNINGEN,Postfach 1307 D-78003 Villingen-Schwenningen DE
国籍：DE
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