Static information storage and retrieval – Analog storage systems
Patent
1979-12-27
1981-11-10
Hecker, Stuart N.
Static information storage and retrieval
Analog storage systems
365149, 365183, G11C 2700, G11C 1140, G11C 1124
Patent
active
043002102
ABSTRACT:
A calibrated sensing system is provided in accordance with the teachings of this invention for sensing charge in a storage medium, such as a storage capacitor, coupled to an access or bit/sense line which compensates for most sources of variability in the storage medium and in the access line. In the system, the unknown charge stored in the storage medium is transferred to a first capacitor or potential well via the access line. A high charge state of the storage medium is written into the storage medium and known fractional packets of charge are prepared therefrom, transferred selectively to a second capacitor or potential well and compared with the unknown charge in the first potential to determine the relative level of the unknown charge that was stored in the storage medium. By selectively using two or more fractional packets of charge multilevel sensing is performed.
REFERENCES:
patent: 3387286 (1968-06-01), Dennard
patent: 3764906 (1973-10-01), Heller
patent: 3819959 (1974-06-01), Chang et al.
patent: 3979734 (1976-09-01), Pricer et al.
patent: 3993917 (1976-11-01), Kalter
patent: 4035667 (1977-07-01), Heller
patent: 4040017 (1977-08-01), Lee
patent: 4085459 (1978-04-01), Hirabayashi
patent: 4137464 (1979-01-01), Heller et al.
patent: 4139910 (1979-02-01), Anantha et al.
patent: 4181865 (1980-01-01), Kohyama
patent: 4202046 (1980-05-01), Ward
Hiltebeitel et al., "Fractional Charge Packet Generator", IBM Tech. Disc. Bul., vol. 20, No. 8, 1/78, pp. 3014-3016.
Heald et al., "Multilevel Random Access Memory Using One Transistor Per Cell", IEEE Jour. of Solid-State Circuits, vol. SC-11, No. 4, 8/76, pp. 519-528.
Lee, "Converter for CCD Multilevel Shift Registers", IBM Tech. Disc. Bul., vol. 20, No. 8, 1/78, pp. 3011-3013.
Chakravarti Satya N.
Heller Lawrence G.
Pricer Wilbur D.
Hecker Stuart N.
International Business Machines Corp.
Limanek Stephen J.
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