Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of biasing or erasing
Patent
1995-06-06
1998-06-02
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of biasing or erasing
G06F 1100
Patent
active
057609853
ABSTRACT:
There is provided an erasing device for erasing the recorded signal in each recording block on a recording medium such as a still video floppy which can individually record the signal into each of the recording blocks. The erasing device comprises: a discriminating circuit to discriminate a recording state of each recording block; an erasing circuit to generate an erasing signal; and a controller to control the erasing circuit in accordance with the result of the discrimination of the discrimination circuit. With this device, a state in which the memory area on the medium is erased can be obtained in a short time using little energy.
REFERENCES:
patent: 4670799 (1987-06-01), Ogura et al.
patent: 4740846 (1988-04-01), Ogawa
patent: 4814904 (1989-03-01), Shigihara et al.
patent: 4939598 (1990-07-01), Kulakowski
patent: 5043831 (1991-08-01), Muramoto et al.
Canney Vincent P.
Canon Kabushiki Kaisha
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