| 摘要 |
PURPOSE:To carry out a reading at high speed under a small voltage by connecting a sense circuit disposed correspondingly to a bit line, to the bit line under a separated condition after initializing, and reading. CONSTITUTION:A CK11 is turned off in the vicinity of a Cl2 and almost at the same time a sense circuit control signal phiS1 is turned on. At this time, since the sense circuit S1 is separated from bit lines B,-B, it does not receive influences of capacities C11C12 of the bit lines but obtains a rapid reponse speed. When an input and an output BS1,-BS1 of the circuit S1 are determined, a CK 15 is turned on, a CK16 is turned off and an input and an output of the sense circuit is changed over from BS2,-BS2 to the BS1, -BS1. The BS2,-BS2 are precharged by a CK14. While, after the bit line is turned off in the word line Cl2, it is precharged in a phip. In this manner, an amplitude of the bit line of the operating voltage is made small, and a high speed and a low power consump tion can be attained. |
