Provided is a semiconductor memory device comprising a pair of data input lines, a pair of data output lines, memory cells arranged in the form of a matrix, the memory cell of each column being connected between a pair of data lines, the memory cell of each row being connected to a row selection line,...http://www.google.com/patents/US4103345?utm_source=gb-gplus-sharePatent US4103345 - Semiconductor memory with data detection circuit
