发明名称 Magnetic reproducing apparatus having a capstan servo circuit
摘要 A magnetic reproducing apparatus having a capstan servo circuit, comprises rotary heads for reproducing a recorded video signal from tracks which are formed obliquely to the longitudinal direction of a magnetic tape, a drum motor for rotating the rotary heads, and a capstan motor for rotating a capstan which drives the magnetic tape to travel. The capstan servo circuit comprises a detecting circuit for detecting a rotation of the rotary heads, and for producing a detection signal which is in accordance with the rotation of the rotary heads, a reference signal generator for generating a reference signal, a synchronizing circuit for synchronizing the phase of the reference signal from the reference signal generator and the phase of the detection signal from the detecting circuit during a high-speed reproducing mode of the reproducing apparatus, a control head for reproducing a recorded control signal from the magnetic tape, a phase comparator for comparing the phase of the control signal which is reproduced by the control head and the phase of the reference signal from the reference signal generator, and a control circuit for controlling a rotation of the capstan motor by an output signal of the phase comparator.
申请公布号 US4539606(A) 申请公布日期 1985.09.03
申请号 US19830554594 申请日期 1983.11.23
申请人 VICTOR COMPANY OF JAPAN LTD. 发明人 ITOH, KENJI
分类号 H04N5/783;G11B15/467;(IPC1-7):G11B5/008 主分类号 H04N5/783
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