Read only memory device with memory cells each storing one of th

Details Read only memory device with memory cells each storing one of th Read only memory device with memory cells each storing one of th

1987-08-07

1989-02-28

Hecker, Stuart N.

Static information storage and retrieval

Read only systems

365103, 365104, 365168, 365189, G11C 700, G11C 1140

Patent

active

048092240

ABSTRACT:
A ROM device includes a plurality of memory cells each storing one of three states, a cell voltage generating circuit for providing a cell voltage corresponding to the state stored in a selected one of the memory cells, and a reference cell for providing a reference voltage which is substantially the same as the cell voltage provided by a memory cell storing an intermediate state of the three states. The ROM also includes a comparator circuit for generating a logical output signal based on the result of a comparison between the cell voltage and the reference voltage.

REFERENCES:
patent: Re32401 (1987-04-01), Beilstein, Jr. et al.
patent: 4404655 (1983-09-01), Naiff
patent: 4449203 (1984-05-01), Adlhoch
patent: 4503518 (1985-03-01), Iwahashi
patent: 4653023 (1987-03-01), Suzuki et al.
IEEE Journal of Solid-State Circuits, vol. SC-16, No. 5, pp. 522, 528 & 529, (Oct. 1981).

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