Level down converter
AssigneeFujitsu Limited
InventorsMasafumi Kondou, Toshihiko Mori
Life of this patent
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Abstract
A level down converter having a first inverter supplied a first power supply voltage, and outputting signals made by logical inversions of input signals, and a second inverter supplied a second power supply voltage being lower than the first power supply voltage, and outputting signals made by logical inversions of output signals from the first inverter, is provided. The first inverter contains a transistor including a gate insulation film having a first film thickness. The second inverter contains a transistor including a gate insulation film having a second film thickness which is thinner than the first film thickness.
Claims19
A level down converter comprising:
- a first inverter supplied with a first power supply voltage, containing at least one first transistor including a gate insulation film having a first film thickness, and outputting signals made by logical inversions of input signals;
- a second inverter supplied with a second power supply voltage being lower than said first power supply voltage, containing at least one second transistor including a gate insulation film having a second thickness which is thinner than said first film thickness, and outputting signals made by logical inversions of output signals from said first inverter;
- and
- a voltage dividing circuit dividing an output voltage of said first inverter and supplying the divided output voltage to an input of said second inverter.
Dependencies are inferred from the claim text.