Rotary head type digital magnetic recording-reproducing apparatu

Details Rotary head type digital magnetic recording-reproducing apparatu Rotary head type digital magnetic recording-reproducing apparatu

1992-07-13

1993-08-24

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

360 64, H04N 578

Patent

active

052394220

ABSTRACT:
A rotary digital magnetic recording-reproducing apparatus includes an envelope detecting unit and a one-of-heads jamming detector. The envelope detector receives an RF signal, reproduced through two heads, having first envelopes indicative of a first head and a second envelope indicative of a second head. The envelope detecting unit produces from the RF signal a train of pulses indicative of the first and second envelopes. The one-of-heads jamming detector monitors the train of pulses to output a signal indicative of the trouble or jamming of one of the first and second heads when an envelope corresponding to one of the first and second heads is lost.

REFERENCES:
patent: 4137547 (1979-01-01), Yamamitsu et al.
patent: 4323934 (1982-04-01), Giraud
patent: 4591925 (1986-05-01), Trytko
patent: 4623994 (1986-11-01), Nabeshima et al.
patent: 4685004 (1987-08-01), Takahashi et al.
patent: 4692914 (1987-09-01), Yasumura et al.
patent: 4719522 (1988-01-01), Kaneko et al.
patent: 5050002 (1991-09-01), Suzuki et al.

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