BIT LINE PRECHARGE CIRCUIT

摘要

PURPOSE: A bit line precharge circuit is provided to reduce precharge time without increasing an area of a main cell. CONSTITUTION: A precharge circuit comprises memory cell array including a plurality of memory cells operated in accordance with signals of a word line, a bit line(B/L) and a bit line bar, a sense amplifier(22) sensing memory cell data through the bit line and bit line bar, a first precharge circuitry(23) pre charging the bit line and bit line bar, a column selection unit(24) selecting column address of the memory cell array, first and second switching transistors connecting the sense amplifiers(22) with the bit line and bit line bar, and a second precharge circuitry(25) connected with the bit line and bit line bar in dummy cell area. The second precharge circuitry(25) receives a precharge driving signal and then pre charges the bit line and bit line bar to a precharge level signal.