Static information storage and retrieval – Analog storage systems
Patent
1986-02-14
1988-05-24
Popek, Joseph A.
Static information storage and retrieval
Analog storage systems
G11C 2700
Patent
active
047470755
ABSTRACT:
Storage of an analog signal sample is achieved by converting the incoming analog sample to a digital sample, by storing the digital sample in a digital memory (7) and by converting the sample read from the memory to an outgoing analog sample. Very good likeness between the incoming and outgoing samples is attained by using, due to a writing order for the analog-digital conversion a conventional closed loop comprising an analog comparator (2), an iterative logic (3) and a digital-analog converter (6), as well as by disconnecting the digital-analog converter (6) by disconnection elements (4 and 5) when the logic (3) has completed the iterative process, as well as by connecting, due to a reading order the reading output of the memory (7) to the converter (6) which then generates the outgoing analog sample. A control unit (9) prevents reading from the memory (7) when an iterative process is in progress.
REFERENCES:
patent: 3999171 (1976-12-01), Parsons
patent: 4156286 (1979-05-01), Connors et al.
O. R. Buhler et al., "Analog-to-Digital Converter Checking Circuit", IBM Technical Disclosure Bulletin, vol. 22, No. 8 B, Jan. 1980, pp. 3618-3619.
Popek Joseph A.
Telefonaktiebolaget LM Ericsson
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