Browse Prior Art Database

Sense Line Decoding

IP.com Disclosure Number: IPCOM000097365D
Original Publication Date: 1962-Oct-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Mahrous, H: AUTHOR

Abstract

Sense line decoding allows a single sense amplifier to service the several sense line segments within a memory plane. The decoding can be controlled by the same addressing mechanism which causes the memory to read out information onto the sense line segments.

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Sense Line Decoding

Sense line decoding allows a single sense amplifier to service the several sense line segments within a memory plane. The decoding can be controlled by the same addressing mechanism which causes the memory to read out information onto the sense line segments.

High speeds desired in modern, large capacity memories have made it necessary to segment the sense lines so that the nanosecond per foot speed limitation of electrical signals along the sense line does not become a limiting factor. So that various noise signals can be localized and their effects neutralized, drive lines sometimes are also segmented. Segmenting of the sense lines usually requires a sense amplifier for each segment. Since sense amplifiers presently are expensive in relation to the other circuits involved in memory, the segmenting approach can be costly.

In this arrangement, a single sense amplifier services all the sense line segments involved in the production of a particular value signal. These related segments generally involve one plane. All the related segments 1...4 are in parallel with one another and in series with decoder 5 in the input circuit of sense amplifier 6. Decoder 5 selects, at any one memory reference, only a single one of the sense line segments, e.g., segment 3, for sensing.

Decoder 5 is controlled by the same addressing circuits 7 which are used to access the particular segment of the memory plane which is to provide the output on the sense line segme...