| 摘要 |
PURPOSE:To prevent surely multiplex selection by using a push-pull MOS inverter to the pre-stage of the output stage inverter of an address input signal drive circuit and using the push-pull inverter as the said output stage inverter. CONSTITUTION:The pre-stage of the output stage inverter of the address input signal drive circuit of an insulation gate integrated circuit is provided with push-pull inverters I3, -I3, I3', -I3' comprised of an enhancement drive MOS transistor (TR) and a load MOS TR having >=1 a mutual conductance gm ratio and the said output stage inverter consists of push-pull inverters I5, -I5 comprised of a load MOS TR having a depletion MOS TR and an enhancement MOS TR in parallel and of an enhancement drive MOS TR. In such a case, when the level of an address input signal is at a middle level, plural NOR circuit decoders are hardly in decoding at the same time, then the multiple selection of memory cells is prevented.
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