| 摘要 |
PURPOSE:To suppress charge-discharge current instantaneously flowing through a sense amplifier circuit and a source wiring by a method wherein a plurality of transistors have mutual conductance values different with the impedance of the source wiring. CONSTITUTION:A source wiring 61 gets connection of the respective drains of a plurality of sense amplifier driving NMOSs 641-64n, and a source wiring 71 connection of the respective drains of a plurality of sense amplifier driving PMOSs 741-74n: out of NMOS 641-64n, the mutual conductance, e.g., the gate width, of the furthest end PMOS 641 is equalized with that of the NMOS 64n and gradually decreased like 641<642<...<64n-1<64n with decreases in impedance of the source wiring 61. Moreover, the mutual conductance, e.g., the gate width, of PMOSs 741-74n is equalized with that of the PMOS 24n at the furthest PMOS 74n and gradually decreased with decreased in impedance of the source wiring 71 like 741<742<...<74n-1<74n. |
