Title:
VIDEO DISC PLAYER
Document Type and Number:
Japanese Patent JPS6013367
Kind Code:
A
Abstract:
PURPOSE:To obtain a fine picture signal by forming a tracking signal for correcting the eccentricity of a turn table independently of a circuit controlling the position of a stylus and adding the tracking signal at the reproducing of the picture signal. CONSTITUTION:When a switch 23 is connected to the (a) side, an adder 15 supplies only a tracking signal to a tracking coil 5. When the turning speed of the turntable is increased and reaches a fixed speed, the switch 23 is turned from (a) to (b), but immediately before the switching, the amplitude component of the tracking signal is converted into DC voltage by a rectifier 21 and held by a holder-2 22. The phase difference between a rotation pulse and the tracking signal is converted into the time width of a square wave by a phase meter 18 and the DC voltage proportional to the time width is taken out by a rectifier-1 19 and held in a holder-1 20. If the switch 23 is turned from (a) to (b) under said state, fixed DC and AC components are applied to the input of a multiplier 16, so that the output component of the multiplier 16 almost coincides with the tracking signal immediately before the switching of the switch 23.
Inventors:
KISO MATAICHIROU
Application Number:
JP12134383A
Publication Date:
January 23, 1985
Filing Date:
July 04, 1983
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
G11B9/06; G11B21/10; (IPC1-7): G11B21/10
Attorney, Agent or Firm:
Masuo Oiwa
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