Altera Corporation

Luqiong Wu

Toan D Do

Jack Chui

Linda Chu

Praveen Krishnanunni

A level shifter circuit includes first and second transistors that receive a first input signal at control inputs. A level shifted output signal is generated by the first and the second transistors. Third and fourth transistors receive a second input signal at control inputs. The first input signal is an inverse of the second input signal. A first multiplexer circuit is configurable to couple a control input of a fifth transistor to the first and the second transistors. A second multiplexer circuit is configurable to couple a control input of a sixth transistor to the third and the fourth transistors.

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Luqiong Wu