Patent ID: 7397297

Claim:
A level shifter circuit comprising: a low voltage circuit for performing a switching operation in accordance with a first switching voltage, which changes in relation with an input voltage applied to an input terminal, to output voltage between a low drive voltage and a low reference voltage, which is lower than the low drive voltage; a high voltage circuit for performing a switching operation based on a second switching voltage, which is higher than the first switching voltage and changes in relation with the input voltage, to output voltage between a high drive voltage and a high reference voltage, which is lower than the high drive voltage; a potential adjustment circuit for shifting an output of the high voltage circuit from the high drive voltage to the low drive voltage and from the high reference voltage to the low reference voltage; and an output selection circuit for outputting a signal in accordance with an output of the potential adjustment circuit when a signal at the input terminal shifts from a low level to a high level, and for outputting a signal in accordance with an output of the low voltage circuit when the signal at the input terminal shifts from a high level to a low level.