Dynamic magnetic information storage or retrieval – Head – Core
Patent
1978-03-07
1980-01-01
Robinson, Thomas A.
Dynamic magnetic information storage or retrieval
Head
Core
179 15BW, 360 23, 358134, H04B 166, H04N 578
Patent
active
041818229
ABSTRACT:
Methods and apparatus for partitioning a wide-band signal into a plurality of separate narrow-band signals partition the wide-band signal into a low-frequency component and a high-frequency component at least partially above the low-frequency component in the spectrum of the wide-band signal. The low-frequency component is translated into a first narrow-band signal having a band of frequencies at least partially higher than the frequencies of the low-frequency component. The high-frequency component is partitioned into at least two separate further narrow-band signals, each having a bandwidth smaller than the bandwidth of the high-frequency component. Alternatively or additionally, sequential pluralities of elements (samples) of the wide-band signal are distributed over a plurality of groups, and each plurality of elements in each group is separately stored. Narrow-band signals are provided by separately releasing stored pluralities of elements from the groups in an at least partially time-coincident relationship.
REFERENCES:
patent: 2629010 (1953-02-01), Graham
patent: 2760011 (1956-08-01), Berry
patent: 3030450 (1962-04-01), Schroeder
patent: 3684838 (1972-08-01), Kahn
patent: 3806640 (1974-04-01), Furukawa
patent: 3809805 (1974-05-01), Kasprazak
patent: 3914554 (1975-10-01), Seidel
Bell & Howell Company
Robinson Thomas A.
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