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FLYING ERASION TYPE VIDEO TAPE RECORDER

机译:飞行侵蚀型录像带录像机

摘要

PURPOSE:To avoid such a case that the signals recorded newly on a track are attenuated or become incomplete by using an erasion current switching means to switch the erasion current to be supplied to a flying erasion head in response to the detecting result of a tape type detecting means. CONSTITUTION:An amplifier 8 of variable amplification degrees amplifies the output of an oscillator 7 and supplies an erasion current to a flying erasion head FEH. A tape type detecting circuit 9 decides whether a video tape is equal to MP or ME and switches the amplification degree of the amplifier 8 according to the MP or ME. That is, the amplification degree of the amplifier 8 is increased with MP and decreased with ME respectively. As a result, the amplitude of said erasion current is large with MP and small with ME. Then, the amplitude most suitable to erasion of an MP video tape is secured with MP; while the amplitude most suitable to erasion of an ME video tape is obtained with ME respectively.
机译:目的:为避免这种情况,通过使用擦除电流切换装置根据磁带类型的检测结果切换要提供给飞行擦除头的擦除电流,来衰减新记录在磁道上的信号或使其变得不完整检测手段。组成:具有可变放大度的放大器8放大振荡器7的输出,并将擦除电流提供给快速擦除头FEH。磁带类型检测电路9确定视频磁带是否等于MP或ME,并根据MP或ME切换放大器8的放大程度。即,放大器8的放大程度分别随着MP而增加而随着ME而降低。结果,所述擦除电流的幅度在MP时大而在ME时小。然后,用MP确保最适合于擦除MP视频带的振幅。而用ME分别获得最适合擦除ME视频带的幅度。

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