Motor speed control circuit for a videocassette recorder

Details Motor speed control circuit for a videocassette recorder Motor speed control circuit for a videocassette recorder

1996-10-04

1999-10-26

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Synchronizing moving-head moving-record recorders

360 75, 360 7306, 386 86, 386 14, G11B 2104, H04N 595

Patent

active

059738731

ABSTRACT:
In a motor control circuit for a VCR, a microcomputer calculates a center frequency to be targeted by a drum motor based on frequency pulses from the capstan motor, and generates a speed control signal for the drum motor based on a frequency deviation of the drum motor from the center frequency. Thus, in the motor control circuit, color misplacement occurring during a tape speed change is eliminated easily and surely.

REFERENCES:
patent: 5231548 (1993-07-01), Yamada et al.
patent: 5239245 (1993-08-01), Lee
patent: 5319500 (1994-06-01), Yu
patent: 5459622 (1995-10-01), Tajima et al.

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