Head switching signal producing circuit for a magnetic recording

Details Head switching signal producing circuit for a magnetic recording Head switching signal producing circuit for a magnetic recording

1984-02-13

1986-07-15

McElheny, Jr., Donald

Dynamic magnetic information storage or retrieval

Record editing

360 64, H04N 5783

Patent

active

046009531

ABSTRACT:
In a helical scanning type video tape recorder provided with two rotary video heads for recording and reproducing a video signal supplied to the heads in the oblique direction of a magnetic tape by alternately switching the two rotary video heads, there is generated a switching signal for the heads which is stable in standard and high speed reproducing modes and thereby stable reproduction always can be obtained. For this purpose, there are provided a circuit for detecting the rotary phase of any one of the two rotary heads, a clock signal generator circuit for generating a clock signal, a counter apparatus for counting the clock signal on the basis of the output of the rotary phase detecting circuit, and a circuit for generating a switching signal for alternately switching the two heads on the basis of the counted value of the counter apparatus.

REFERENCES:
patent: 4420775 (1983-12-01), Yamazaki et al.
patent: 4428004 (1984-01-01), Mino
patent: 4509082 (1985-04-01), Kroner

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