Static information storage and retrieval – Analog storage systems
Patent
1983-08-04
1990-03-20
Fears, Terrell W.
Static information storage and retrieval
Analog storage systems
36518901, 36523001, 365222, G11C 1300
Patent
active
049107062
ABSTRACT:
The present invention is directed to an analog memory for storing digital information in analog signal form. Typically, digital information is stored in digital signal form, where each digital bit is stored in a separate digital memory cell. In accordance with the present invention, an analog memory such as a charge transfer device (CTD), bubble memory, or magnetostrictive memory is used to store analog signals. Each analog signal is representative of a plurality of digital bits, thereby providing storage for a plurality of digital bits in each analog memory cell. Use of such an analog memory in combination with a digital system facilitates a hybrid memory, where digital information is stored in analog signal form. In one embodiment, a digital to analog converter is used to convert digital information from a digital processor to analog signal form for storage in an analog memory and an analog to digital converter is used to convert analog signals stored in an analog memory to digital signal form for processing with the digital processor. In another embodiment, an analog read only memory is used to store a program for a stored program digital computer in analog signal form. Storage of digital information in analog signal form increases the efficiency of storage because a plurality of digital bits can be stored in each memory cell. An embodiment having analog error compensation utilizes a reference signal for adaptive compensation of errors. Various systems using such memories are disclosed including signal processors, stored program computers, reverberation systems, and others.
REFERENCES:
patent: 3763480 (1973-10-01), Weimer
patent: 3772658 (1973-11-01), Sarlo
patent: 3914748 (1975-10-01), Barton
patent: 3958210 (1976-05-01), Levine
patent: 3986176 (1976-10-01), Weimer
patent: 3991409 (1976-11-01), Dautremont
patent: 4092734 (1978-05-01), Collins et al.
patent: 4271488 (1981-06-01), Saxe
Huskey et al., Computer Handbook, First Edition, McGraw-Hill Book Company, Inc., New York, 1962, pp. 6-26, 27, 44 (hereinafter Huskey).
Fears Terrell W.
Hyatt Gilbert P.
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