Patent ID: 7049881

Claim:
A circuit, comprising: a comparing means for comparing an internal voltage to a reference voltage for outputting a first driving signal; an internal voltage driving means for outputting the internal voltage in response to the first driving signal; an internal voltage detecting means for detecting the internal voltage and for generating a second driving signal in response to an active signal; and an overdriving control means for controlling the first driving signal in response to the second driving signal, wherein the internal voltage detecting means includes: a first inverter for inverting the active signal to generate an inverted active signal, wherein the first inverter is connected between the internal voltage and a ground voltage; a second inverter for inverting the inverted active signal, wherein the second inverter is connected between the internal voltage and the ground voltage; a first voltage generating circuit for receiving an output signal of the second inverter and for outputting a first voltage derived from the output signal; a first transistor connected to the internal voltage, wherein the first transistor is turned on to activate the second driving signal in response to the inverted active signal; a second transistor connected to a ground voltage, wherein the second transistor is turned on to inactivate the second driving signal when the first voltage is greater than a predetermined voltage; and a switching transistor, wherein the switching transistor is turned onto inactivate the second driving signal in response to the inverted active signal.