| 摘要 |
<p>PURPOSE:To shorten a read access time by increasing the charging ability of a circuit, which charges a bit line to a prescribed voltage through a bit line decoder, only for a prescribed time in a sense amplifier circuit. CONSTITUTION:In addition to a feedback type bias circuit composed of an inverter 2 and an N-channel transistor Q3, the other feedback type bias circuit is composed of an inverter 3, which is controlled by a control signal ATD, and N-channel transistor Q6. This bias circuit is set in an operational state only for the prescribed time and the bit line of a memory transistor M1 is charged to the prescribed voltage through respective bit line selecting transistors Q4 and Q5. Thus, time for charging the bit line can be shortened.</p> |
