Patent ID: 7545201
Filing Date: 2009-06-09
Classification: G11C,H03K

Abstract:
1. A system for providing a voltage, the system comprising: a first transistor including a first gate, a first terminal, and a second terminal, the first terminal configured to receive a first predetermined voltage, the first gate configured to receive a first control signal from a level shifter; a second transistor including a second gate, a third terminal, and a fourth terminal, the second gate configured to receive a second control signal, the third terminal being biased to a second predetermined voltage, the second terminal and the fourth terminal being directly connected to a first node, the first node being associated with a first voltage level, the second transistor being turned off if the first transistor is turned on; a third transistor including a third gate, a fifth terminal, and a sixth terminal, the third gate configured to receive a third predetermined voltage, the fifth terminal directly connected to the first node; and a fourth transistor including a fourth gate, a seventh terminal, and an eighth terminal, the fourth gate directly connected to the first node, the eighth terminal configured to receive the third predetermined voltage, the seventh terminal being coupled to the sixth terminal.