A semiconductor memory includes a plurality of memory cells connected between word line pairs and between the digit line pairs in matrix form. To compensate for voltage drops developed along the word line, there are provided current sources, each of which is connected to a reference line to supply constant...http://www.google.de/patents/US4164791?utm_source=gb-gplus-sharePatent US4164791 - Semiconductor memory with equal word line and reference line voltage drop
