Patent ID: 6340852
Filing Date: 2002-01-22
Classification: G05F

Abstract:
A voltage generating circuit receiving an external power supply voltage and generating an operation power supply voltage of a predetermined value, comprising:an external power supply interconnection for transmitting said external power supply voltage; an internal power supply interconnection for transmitting said operation power supply voltage; a control node: an output switch circuit activated based on the voltage level of said control node for connecting said external power supply interconnection and said internal power supply interconnection; an auxiliary voltage generating circuit, connected between said external power supply interconnection and said internal power supply interconnection and activated complementary to said output switch circuit based on the voltage level of said control node, for supplying the voltage of said predetermined value to said internal power supply interconnection; and a voltage switch control circuit for controlling the voltage of said control node to activate said auxiliary voltage generating circuit before the voltage level of said external power supply interconnection is stabilized at an activation of said external power supply interconnection and to activate one of said output switch circuit and said auxiliary voltage generating circuit, which is selected according to a relationship between said external power supply voltage and said predetermined value after the voltage level of said external power supply interconnection is stabilized.