| 摘要 |
<p>A semiconductor integrated circuit device comprising a semiconductor region or a substrate for DC isolating a first well region on which a circuit element handling a micro signal relative to the working voltage or an analog signal is formed. The semiconductor region or the substrate is AC coupled with the potential of a semiconductor region or the substrate on the periphery of the first well region using a first capacitive element. It is amplified through an inverted amplifier circuit and the output signal is AC coupled with the semiconductor region or the substrate on the periphery of the first well region using a second capacitive element, thus canceling potential variation of the semiconductor region or the substrate and stabilizing the potential.</p> |
