Patent ID: 7786791

Claim:
An internal voltage generation circuit, comprising: a reference oscillation signal generator configured to generate a reference oscillation signal according to a result of a comparison of a pumping voltage with a reference voltage; an oscillation signal generator configured to generate a plurality of oscillation signals having a predetermined phase difference, in response to the reference oscillation signal; and a pumping voltage generator configured to generate the pumping voltage through sequential charge pumping operations performed in response to the respective oscillation signals, wherein the oscillation signal generator includes a plurality of control signal generators configured to generate a plurality of control signals sequentially activated in response to the reference oscillation signal, and a plurality of oscillation signal output units configured to output the plurality of oscillation signals in response to the plurality of control signals, and wherein the plurality of control signal generators include a first control signal generator configured to output an input signal as a first control signal in response to the reference oscillation signal, and at least one second control signal generator configured to output the first control signal as a second control signal in response to the reference oscillation signal.