Constant wavelength magnetic recording

Details Constant wavelength magnetic recording Constant wavelength magnetic recording

1976-12-03

1978-09-19

Lucas, Jay P.

Recorders

Magnetographic

360 70, G03G 1900, G11B 2102

Patent

active

041157869

ABSTRACT:
Constant wavelength magnetic imaging is provided by generating a signal having a frequency proportional to the speed of a rotational recording member, multiplying that frequency up to a higher, desired recording frequency, and phase-locking the higher frequency signal to the unmultiplied lower frequency, thus synchronizing the recording frequency with the motor speed.

REFERENCES:
patent: 3401231 (1968-09-01), Baldwin
patent: 3441687 (1969-04-01), Inoue
patent: 3465349 (1969-09-01), Schoeneman
patent: 3499997 (1970-03-01), Kosugi
patent: 4004205 (1977-01-01), Yamamoto

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