US Patent 11245399 Level shifters and semiconductor devices including the same

A level shifter includes an input circuit configured to generate and output first and second intermediate signals based on an input signal that transitions between a first voltage level and a second voltage level. The level shifter includes a feed forward circuit configured to receive the first intermediate signal from the input circuit and generate and output a third intermediate signal enabled in a part of a period in which the first intermediate signal is enabled and to receive the second intermediate signal from the input circuit and generate and output a fourth intermediate signal enabled in a part of a period in which the second intermediate signal is enabled. Moreover, the level shifter includes a level shifting circuit configured to receive the first through fourth intermediate signals and to shift the input signal to an output signal that transitions between a third voltage level and the second voltage level.