Patent ID: 7973783

Claim:
A power circuit, comprising: a frequency dividing circuit driven by a source voltage to divide frequency of a first signal to which at least a level shift processing has been applied; a boosting circuit driven by a source voltage to boost the voltage according to at least one of an output signal from the frequency dividing circuit and a second signal having a lower frequency than that of the first signal as a boosting pulse; a level shifter that shifts the level of the first signal by an output voltage from the boosting circuit; and a switching unit that complementarily inputs an output signal from the level shifter to the frequency dividing circuit and the second signal to the frequency dividing circuit or the boosting circuit, wherein the first signal has a first amplitude, and the second signal has a second amplitude equal to or larger than the first amplitude and equal to or lower than the level of the source voltage which includes the first amplitude, and the switching unit obtains a boosted voltage output from the boosting circuit after a boosting operation performed by the boosting circuit having received the second signal, inputs the boosted voltage output to the level shifter such that the level shifter can execute level conversion of the first signal, and stops the boosting operation performed according to the second signal, thereafter inputting the level-shifted first signal to the boosting circuit via the frequency dividing circuit to obtain final boosted voltage.