Dynamic magnetic information storage or retrieval – Converting an analog signal to digital form for recording;...
Patent
1991-03-26
1993-06-22
Mis, David
Dynamic magnetic information storage or retrieval
Converting an analog signal to digital form for recording;...
360 49, G11B 509
Patent
active
052220010
ABSTRACT:
The structure of the RAM in the signal processing circuit of a digital audio tape recorder. When the reproduction mode is switched over to the recording mode, or the sampling frequency for the recording is changed to a different sampling frequency, a RAM clear signal is automatically output. At the output of the RAM clear signal, a converting circuit disposed in the route from a read address generator to an address bus is operated so as to read the digital sound data from the RAM and supply the digital sound data to a recording head and record it on a magnetic tape. Address signals only in the odd blocks of the RAM are generated and null data is serially written thereinto, thereby clearing the RAM.
REFERENCES:
patent: 5021893 (1991-06-01), Scheffler
Patent Abstracts of Japan, vol. 13, No. 239 (P879) Jun. 6, 1989 and JP-A-01 043 871 (Hitachi Ltd.) Feb. 16, 1989.
Patent Abstracts of Japan, vol. 13, No. 175 (P-863) Apr. 25, 1989 and JP-A0-1 007 374 (Mitsubishi Electric Corp.) Jan. 11, 1989.
Patent Abstracts of Japan, vol. 9, No. 190 (P-378) (1913) Aug. 7, 1985 and JP-A-60 057 570 (Matsushita) Apr. 3, 1985.
Kitazume Hisao
Tokumatsu Hiromu
Mis David
Sanyo Electric Co,. Ltd.
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