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Detecting circuit of tracking error signal of optical pickup

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专利汇可以提供Detecting circuit of tracking error signal of optical pickup专利检索,专利查询,专利分析的服务。并且PURPOSE: To eliminate a high band component and to reduce the noise generated from an actuator, by eliminating the PCM signal leaked into a tracking error signal without changing the characteristic of a tracking servo loop.
CONSTITUTION: A delaying device 9 is connected to the output of a detector 4-1 to delay the output of the detector by a time equivalent to the delay time τ between light spots 1 and 2. Both spot 2 and an optical detector 4-2 have the same PCM signal while the outputs of the preceding spot 1 and the optical detector 4-1 are delayed by the time τ. Therefore the PCM signal component is equal among input signals of a differential amplifier 6, and the output of the amplifier 6 contains no PCM signal component. As a result, no PCM signal component is contained in the input signal of a tracking servo actuator 8. Thus no noise is generated from the actuator 8.
COPYRIGHT: (C)1983,JPO&Japio,下面是Detecting circuit of tracking error signal of optical pickup专利的具体信息内容。

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