Patent ID: 8629704

Claim:
A level shifter comprising: an input end configured to receive an input voltage signal, the input voltage signal including a first state transition from a first voltage state to a second voltage state; an output end configured to output an output voltage signal having a second state transition from a third voltage state to the second voltage state corresponding to the first state transition of the input voltage signal; a driver stage coupled between the input end and the output end, the driver stage comprises a first transistor and a second transistor; an inverter having an input coupled with the input end; a third transistor having a gate end coupled with an output of the inverter, the third transistor having a drain end and a source end, the drain end of the third transistor being coupled with a line capable of providing a pumped voltage; a fourth transistor coupled with the output end, the fourth transistor having a drain end and a source end, the source end of the fourth transistor being coupled with the line; a fifth transistor being coupled with the input end, the fifth transistor having a drain end and a source end, the source end of the fifth transistor being coupled with the third and fourth transistors; and a sixth transistor being coupled with the input end, the sixth transistor having a drain end and a source end, the drain end of the sixth transistor being coupled with the drain end of the fifth transistor and gates of the first and second transistors.