Patent ID: 8704579

Claim:
A level shifting circuit, comprising: an input node; an output node; a first voltage node configured to receive a first voltage; a second voltage node configured to receive a second voltage different from the first voltage; a third voltage node configured to receive a third voltage different from the first voltage and the second voltage; a first circuit coupled to the input node, the output node and the first voltage node and configured to pull an output voltage at the output node toward the first voltage in accordance with an input voltage applied to the input node; a second circuit coupled to the first circuit, the output node and the second voltage node and configured to pull the output voltage toward the second voltage in accordance with the input voltage from the first circuit, the second circuit comprising a first transistor, a source of the first transistor being coupled to the second voltage node, and a drain of the first transistor being coupled to the output node; a second transistor having a source coupled to the third voltage node and a gate coupled to the drain of the first transistor, the second transistor and the first transistor having different channel types; and an output voltage controlling circuit coupled to the output node and configured to control the output voltage within a voltage range narrower than a range from the first voltage to the second voltage.