BIPOLAR MEMORY

摘要

PURPOSE:To make memory circuits with redundancy suitable for bipolar memories by a method wherein the bases of emitter followers driving word lines are connected to fuses and clamp circuits. CONSTITUTION:Bipolar memories in respective lines of a memory main body 103 are driven through the intermediary of word lines 110 selected by emitter followers 11 the bases of which are connected to low clamp circuits 12 and defective bit cutting off fuses 102. The fuses 102 can be miniaturized by flowing smaller current of 1/(current amplification degree) than that of word lines 110 due to the bipolar memories driven through the intermediary of emitter follower 11. Furthermore, when the fuses 102 are cut off by deflective bit, the potential of defective word line 110 can be clamped down on no-selective potential by the circuits 12 not to saturate a transistor feeding the bipolar memories with constant current so that any defective insulation from bipolar circuits may be prevented from occurring to make memory circuits with redundancy suitable for the bipolar memories.