Logic circuit capable of level shifting
AssigneeSamsung Electronics Co., Ltd.
InventorsJonghoon Jung, Sounghoon Sim, Mi yeon Ahn
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Abstract
A logic circuit includes a logic gate unit, an inverter, and a switching circuit. The logic gate unit receives a power supply voltage and an input signal to output a first signal. The inverter receives the first signal to output a second signal. The switching circuit provides one of first and second power supply voltages as the power supply voltage of the logic gate unit in response to the first and second signals. The first power supply voltage and the second power supply voltage have different voltage levels, thus enabling stable level shifting.
Claims14
A logic circuit comprising:
- a logic gate unit receiving a power supply voltage and an input signal to output a first signal;
- an inverter receiving the first signal to output a second signal;
- and
- a switching circuit providing one of first and second power supply voltages to a power input terminal of the logic gate unit in response to the first and second signals, wherein a first transistor of the switching circuit directly receives the first signal and a second transistor of the switching circuit receives the second signal,
- wherein the power input terminal of the logic gate unit comprises one of a source and a drain terminal of a transistor of the logic gate unit, and
- wherein the first power supply voltage and the second power supply voltage have different voltage levels.
A logic circuit comprising:
- a first inverter receiving an input signal at a first input terminal, the first inverter outputting a first signal;
- a logic gate unit receiving a power supply voltage and the first signal to output a second signal;
- a second inverter receiving the second signal to output a third signal;
- a first switching circuit receiving the third signal and providing a first power supply voltage as the power supply voltage of the logic gate unit in response to the third signal;
- and
- a second switching circuit directly receiving the second signal and providing a second power supply voltage as the power supply voltage of the logic gate unit in response to the second signal,
- wherein the first power supply voltage and the second power supply voltage have different voltage levels.
Dependencies are inferred from the claim text.