| 摘要 |
PROBLEM TO BE SOLVED: To provide a level shifter circuit where an operation is fast even when the number of elements is small. SOLUTION: When an input voltage Vin becomes a grounding voltage Vss and the gate voltage (voltage of the input terminal of a level shifter part) of a PMOS 31 and an NMOS 21 becomes a power supply voltage Vdd, an NMOS 23 is turned on. Thus, the drain voltage (voltage of the output terminal of the level shifter part) of a PMOS 33 and an NMOS 22 tends to become a power supply voltage Vpp, and an output voltage Vout tends to become the grounding voltage Vss. That is, the operation of the level shifter circuit becomes fast. Also, since the number of inverters becomes smaller compared to a conventional level shifter circuit, the number of elements is reduced. COPYRIGHT: (C)2009,JPO&INPIT
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