| 摘要 |
A voltage transform circuit transforms a transferred voltage to a desired magnitude of voltage. The voltage transform circuit includes: a first power supply unit for providing a digital voltage (Vdd- 1 ) of a first magnitude; a second power supply unit for providing an analog voltage (Vaa- 2 ) of a second magnitude; and a voltage transform unit formed with a plurality of MOS transistors, wherein the MOS transistors operate to transfer the digital voltage (Vdd- 1 ) from the first power supply unit, and output a digital voltage (Vdd- 3 ) of a third magnitude corresponding to the analog voltage (Vaa- 2 ) transferred from the second power supply unit. By using an analog voltage (Vaa- 2 ) that is higher than the digital voltage (Vdd- 1 ), it becomes possible to increase the magnitude of the output digital voltage (Vdd- 3 ). By supplying this high digital voltage (Vdd- 3 ) to a charge pump, the level of the charge pump is lowered.
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