| 摘要 |
<p>PURPOSE:To shorten a programming time by raising a comparative electric potential at the time of writing without operating outside. CONSTITUTION:When a reading time, or a writing voltage Vp is not impressed, an output electric potential of a circuit 14 is set at an intermediate electric potential between a main unit's a ''0'' level potential of main unit and a ''1'' level potential. While at the time of writing, when the writing voltage Vp is impressed, a transistor C11 is conducted and the output potential of the circuit 14 is higher than output potential at the time of reading, by which power source potential Vc is raised and effects can be obtained the same as several writing pulses given from a point that writing is completed, thereby shortening a programing time.</p> |
