| 摘要 |
PURPOSE:To improve the circuit integration with simple circuit and stable operation, by providing an NOR gate for an input side of a write circuit and performing write recovery operation. CONSTITUTION:When a write control signal externally changes to an L level, a write control signal WE' formed with a control circuit 7 goes to H level to turn on MOSFETs Q18 and Q19 and to connect the output terminal of a circuit 6 and a common data line CD. When the control signal formed at a circuit 7 is changed to L level, NOR gates G1 and G2 are opened and write is made to one memory cell selected. At the end, the circuit 7 is formed so that the leading of a signal is made faster by a time td than the signal WE'. Thus, through the turning on of Q15 and Q16, since the signal changes to H level while the line CD is kept coupled to the output terminal of the circuit 6, the circuits G1 and G2 are closed and the both outputs attain L level. Thus, the level of the line CD quickly changes to H level for the recovery operation. |
