Registers – Transfer mechanism – Traveling pawl
Patent
1975-08-04
1976-09-21
Atkinson, Charles E.
Registers
Transfer mechanism
Traveling pawl
G11C 2900
Patent
active
039821110
ABSTRACT:
A diagnostic system is disclosed for detecting malfunctions in the access circuitry utilized to control the reading, writing, and refreshing of a plurality of semiconductor memory modules. More specifically, a pair of access circuits are provided for each module with each access circuit only controlling the accessing of predetermined bits of each word stored in that module. During read, write and refresh operations, the output signals generated by each of the two access circuits for application to the memory elements in that module are "compared" to ensure that the memory elements are being properly accessed. Moreover, even when one memory module is accessed, the output signals of each pair of access circuits in each of the other nonaccessed modules are compared to ensure their continued operability.
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patent: 3270318 (1966-08-01), Strawbridge
patent: 3599146 (1971-08-01), Weisbecker
patent: 3806716 (1974-04-01), Lahti et al.
patent: 3814922 (1974-06-01), Nibby et al.
patent: 3844800 (1976-03-01), Beck et al.
Lerner Edward Mark
Peterson David Cartwright
Quin Terrence Thomas
Ruel Bernard George
Atkinson Charles E.
Bell Telephone Laboratories Incorporated
Landis M. S.
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