Patent ID: 7592850

Claim:
An input voltage boosting level shifter comprising: a level shifting circuit shifting a level of a boosted signal input through an input terminal connected to the level shifter and outputting the boosted signal at a new level; and a boosting circuit receiving an input signal, boosting a voltage of the input signal to generate the boosted signal, and providing the boosted signal to the input terminal, wherein the boosting circuit comprises: a first inverter which reverses the input signal; a second inverter which reverses an output signal of the first inverter; a delay unit which delays an output signal of the second inverter; a third inverter which reverses an output signal of the delay unit; a fourth inverter which reverses an output signal of the third inverter; a first capacitor having a first end connected to an output terminal of the fourth inverter and a second end connected to the input terminal; a second capacitor having a first end connected to an output terminal of the third inverter and a second end connected to a complementary input terminal of the input terminal connected to the level shifting circuit; a first control transistor having a gate connected to an output terminal of the second inverter, a first end connected to the first source voltage, and a second end connected to the input terminal; a second control transistor having a gate connected to an output terminal of the first inverter, a first end connected to the input terminal, and a second end connected to a reference voltage; a third control transistor having a gate connected to an output terminal of the first inverter, a first end connected to the first source voltage, and a second end connected to the complementary input terminal; and a fourth control transistor having a gate connected to an output terminal of the second inverter, a first end connected to the complementary input terminal, and a second end connected to the reference voltage.