Pickup cartridge

  • Inventors:
  • Assignees: Victor Co Of Japan Ltd
  • Publication Date: April 15, 1981
  • Publication Number: JP-S5639700-A


PURPOSE:To perform excellent-SN-ratio reproduction by eliminating distortion by holding a cantilever at the best operation point by a speaker driving signal from a speed amplitude proportion type detection part and a tone arm control signal from a displacement proportion type detection part. CONSTITUTION:In reproduction, recording signal detection coil 16 in pickup cartridge 10 extracts a recording signal as an induced voltage proportional to a time change in magnetic flux flowing in core 15 and supplies it to speaker 6 via preamplifier 4 and power amplifier 5. On the other hand, a low frequency component signal obtained from the output of Hall element 17 via LPF7 is applied as a tone arm control signal to electromechanical coupling part 9 via control amplifier 8 to displace tone arm 3 by turning it. This control signal has a sufficiently high voltage and further a voltage proportional to the stylus-tip displacement, and consequently stable control is so exercised that cartridge 10 will be positioned at the fixed place of record disk 1, namely, that cantilever 13 will be at the best operation position.




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Patent Citations (1)

    Publication numberPublication dateAssigneeTitle
    JP-S5077002-AJune 24, 1975

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