| 摘要 |
PROBLEM TO BE SOLVED: To enable a high speed of a memory access by forming a signal transmission path of a length enough to intersect a memory array, by a method wherein a main amplifier and a Y decoder are disposed at both ends across the memory array. SOLUTION: If a Y address is inputted, it is passed through an address buffer ADDBUP and transmitted to a Y decoder YDC disposed on a circumferential side of a chip via a relief circuit RED and a predecoder PDC provided in an intermediate part of a memory array, and a Y selection signal is formed therein. A complementary bit line of one sub-array is selected from the Y selection signals, which are transmitted to a main amplifier MA on a center part side of the chip counter thereto, and are amplified and outputted through an output circuit. Accordingly, in an intermediate part leading from the center part to a portion where an address decoder is provided, a predecoder for decoding an address signal is disposed, whereby it is possible to shorten a signal transmission path while avoiding a jam of wirings, and to contrive a high speed. |
