Patent ID: 6930518
Filing Date: 2005-08-16
Classification: H03K

Abstract:
1. A level shifter for changing an input signal whose level changes between a first voltage level and a ground voltage level into an output signal whose level changes between a second voltage level and the ground voltage level, the level shifter comprising: a first input transistor and a second input transistor which receive the input signal and an inversion signal of the input signal, respectively; a first load transistor and a second load transistor, one side of each transistor being connected to the second voltage level; a first switch transistor connected between the first load transistor and the first input transistor, the first switch transistor responds to the inversion signal; a second switch transistor connected between the second load transistor and the second input transistor, the second switch transistor responds to the input signal; a first output unit that generates the output signal in response to a signal generated at a connection node between the first load transistor and the first switch transistor and a signal at a connection node between the first input transistor and the first switch transistor; and a second output unit that generates a complementary signal of the output signal in response to a signal generated at a connection node between the second load transistor and the second switch transistor and a signal at a connection node between the second input transistor and the second switch transistor.