Patent ID: 9019003
Filing Date: 2015-04-28
Classification: G11C,H02M

Abstract:
1. A voltage generation circuit comprising: an oscillator configured to output a first period signal and a second period signal in response to a detection signal; a period signal select unit configured to receive the first and second period signals and output one of the first and second period signals as an additional period signal in response to a control signal; a first pump section configured to charge-pump an input voltage in response to the first period signal and output a power supply voltage; a second pump section configured to charge-pump the input voltage in response to the additional period signal and output the power supply voltage; and a detection unit configured to compare a reference voltage and the power supply voltage and generate the detection signal, wherein the detection signal is enabled when a voltage level of the power supply voltage is lower than a voltage level of the reference voltage, and a voltage level of the detection signal is changed in relation to a voltage difference between the reference voltage and the power supply voltage, and wherein the oscillator outputs the first period signal when a voltage level of the enabled detection signal is under a predetermined voltage level, and additionally outputs the second period signal when a voltage level of the enabled detection signal is over the predetermined voltage level.