| 摘要 |
PURPOSE: A word line pull-up and pull-down circuit is provided to prevent leakage current by controlling supply of unnecessary bias voltage. CONSTITUTION: A multitude of fuses(F1 to FN) and a multitude of inverters(I1 to IN) are connected directly between a multitude of low address signal input terminals(X1 to XN) and a multitude of word lines(WL1 to WLN). A multitude of PMOS transistors(P1 to PN) are connected between supply voltage(Vcc) and input terminals of the inverters(I1 to IN). An enable fuse(EF) of a selection circuit(10) is connected between the supply voltage(Vcc) and a node(K). A plurality of inverters(G1,G2) are connected between the node(K) and an output terminal(Sout). NMOS transistors(C,N) are connected between the node(K) and a ground. The word lines(WL1 to WLN) are selected by address signals of a low decoder.
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