| 摘要 |
PURPOSE: To obtain an output buffer circuit in which a rise time or a fall time of an output voltage at an output terminal is decreased and transfer delay time of an output voltage is minimized. CONSTITUTION: A capacitive means including a gate electrode capacitance of an output drive MOS transistor(TR) is gradually charged to make a rise time or a fall time short in the output buffer circuit and the output buffer circuit is provided with threshold voltage charge means 1, 2 charging quickly the capacitive means up to a threshold voltage of the output drive MOS TR. |
