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Patent Searching and Data


Title:
VIDEO SIGNAL REPRODUCING DEVICE
Document Type and Number:
Japanese Patent JPS6043247
Kind Code:
A
Abstract:

PURPOSE: To fix the position of a noise band in fast picture search and to reduce the noise band substantially by adding a speed servo circuit and a phase servo circuit to a reel motor.

CONSTITUTION: The speed servo circuit 6 generates a drive signal for the reel motor so that the period of a reel control signal is constant. A detecting circuit 27 detects the coincidence in pulse width between the output signal of a mixing circuit 25 and a speed error signal, and a magnetic tape is run at a maximum speed in this case. Further, a pulse signal divided by a frequency dividing circuit 7 to 30Hz is supplied to an input terminal 31 of the phase serve circuit 9. The output signal of an AND gate 35 is passed through an amplifier 37 and a servo error signal appears at the output terminal 13. A phase adjusting circuit 33 adjusts the position of the noise band in a reproduction screen during the fast picture search.


Inventors:
TAKAYANAGI SENJI
Application Number:
JP15118883A
Publication Date:
March 07, 1985
Filing Date:
August 19, 1983
Export Citation:
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Assignee:
SONY CORP
International Classes:
H04N5/783; G11B15/18; G11B15/467; (IPC1-7): G11B15/467; H04N5/783
Domestic Patent References:
JPS5786159A1982-05-29
JPS518820A1976-01-24
JPS5572242U1980-05-19
Attorney, Agent or Firm:
Masatomo Sugiura