| 摘要 |
<p>A power supply circuit for supplying internal voltage to an output node includes a pull-up driver, a pull-down driver, a pull-up drive blocking unit, and a pull-down drive blocking unit. In response to a result obtained by comparing the internal voltage to first reference voltage, the pull-up driver is driven to generate the internal voltage from power supply voltage. In response to a result obtained by comparing the internal voltage to second reference voltage, the pull-down driver is driven to discharge the internal voltage level. In response to the result obtained by comparing the internal voltage to the second reference voltage, the pull-up drive blocking unit blocks the pull-up driver from being driven. In response to the result obtained by comparing the internal voltage to the first reference voltage, the pull-down drive blocking unit blocks the pull-down driver from being driven. [Reference numerals] (13) Pull-up driver; (23) Pull-down driver; (31) Pull-up drive blocking unit; (33) Pull-down drive blocking unit</p> |
