| 摘要 |
PURPOSE:To realize a simple-constitution circuit which features a high-speed operation and small amount of power consumption at the queuing time, by securing both the capacitor charging concurrently with application of the input voltage and the bootstrap function via the capacitor at one time. CONSTITUTION:MOSFET5 is connected between point A and the earth point, and the gate is connected to input terminal C along with the gate of MOSFET4. The high-level voltage is always applied to terminal C, and FET4 and 5 are ON. And voltage VA and VB of point A and output terminal B are at the earth potential each. When input voltage VC to terminal C becomes to a low level, voltage VA at point A increases quickly to make MOSFET2 conduct. And then voltage VA is raised up to secure the ON state for FET2, and output voltage VB holds VDD. When voltage VC turns to a high level again, both voltage VB and VA are set to the earth potential again. |
