Level displacement circuit

The utility model discloses a level displacement circuit. In allusion to the defects of the conventional level displacement circuit that the area of a smaller circuit layout and the effective level displacements of different duty ratio input voltages can not be realized at the same time, the utility model provides a level displacement circuit, comprising a double-pulse generating and shaping circuit, a high/low level displacement converting circuit, a high-voltage pulse filtering shaping circuit and an RS trigger. The level displacement circuit is characterized in that the high/low level displacement converting circuit comprises an LDMOS tube, a NMOS tube, a first resistor, a second resistor, a third resistor, a first diode and a second diode. Compared to the conventional level displacement circuit of using two LDMOS tubes, the level displacement circuit of the utility model just uses one LDMOS tube, so that the layout area is reduced, and the effective level displacements of different duty ratio input voltag