| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a bootstrap circuit capable of setting the gate potential of a transistor to a supply voltage or lower. <P>SOLUTION: The substrate terminal of an NMOS transistor 11 is connected to the source of the NMOS transistor 11, and a control voltage Vcntl ((bootstrap voltage Vreg)+(threshold voltage VTHn of the NMOS transistor 11)) is applied to the gate of the NMOS transistor 11 while a control circuit 13 is in a hold period, and a ground potential is applied to the gate of the NMOS transistor 11 while the control circuit 13 is in a sampling period. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
