| 摘要 |
PURPOSE:To lower the operating power supply voltage of the high voltage switching circuit to the operating limit voltage of a device. CONSTITUTION:In order to transmit the level of a terminal 5 to a terminal 4 according to a control signal inputted to a terminal 3, boosting is executed by the clock of a positive phase inputted from a terminal 2 while using a charge pump circuit composed of a transistor 10, transistor 8 and capacitor 12. Further, the boosting of a connecting part 13 is executed by the clock of a reverse phase inputted from the terminal 2 while using a charge pump circuit composed of a transistor 9, transistor 7 and capacitor 11. Thus, a transistor 6 improving a boosting effect with the complementary of the charge pump circuits using the two clocks of the inverted phases prevents the level of the boosted terminal 4 and the control signal of the terminal 3 from being short-circuited. |
