Patent ID: 7282987

Claim:
An internal voltage generator for stably generating an internal voltage, comprising: a latch unit for generating a first and a second driving signals which have exact 180-degree phase difference based on a periodic signal; a first pump block for generating the internal voltage in response to the first driving signal; and a second pump block for generating the internal voltage in response to the second driving signal, wherein the first pump block includes: a first pumping control signal generation unit for generating a first control signal in response to the first driving signal; and a first charge pumping unit for performing a positive pumping operation to a first power supply voltage in response to the first control signal in order to generate the internal voltage, wherein the first charge pumping unit includes: a first p-type metal oxide semiconductor (PMOS) transistor coupled to a first node and having a gate receiving the first control signal; a first n-type metal oxide semiconductor (NMOS) transistor coupled to a second power supply voltage and having a gate receiving the first control signal, a blocking NMOS transistor coupled between the first node and the first NMOS transistor and having a gate receiving the first power supply voltage; and a first capacitor coupled between the first node and an output node for outputting an output voltage.