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AND, OR, AND COPY functions can be performed with a conventional memory array modified so that word lines are independently addressable.
English (United States)
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Memory Array Performs Logical Functions
AND, OR, AND COPY functions can be performed with a conventional
memory array modified so that word lines are independently addressable.
COPY functions - read a memory word and after the signals on the bit lines
have been amplified, the word line for the location into which data is to be copied
is brought high, gating data into that word. COPYs can be made to the same half
of the array or to the half on the opposite side of the sense amplifiers 11.
AND functions - before the amplify operation in a read cycle, the word lines
corresponding to the words to be added (both words must be on the A [data true]
side of the array 12 - use the "COPY" function to accomplish this) are both
brought high at the times a single line would be brought high in a conventional
OR functions - same operation as the "AND" function except both sides must
be on the B (data complement) side 13 of the array. _ _ _____ R S = R + S. I/O - single ended, connected to the bit lines on the A side of the array 14.