High speed voltage level shifter

A method for performing voltage level shifting using a voltage level shifter, the voltage level shifter comprising first and second cross-coupled NOR gates, the method comprising:

• inputting a first input signal in a first power domain to the first NOR gate;
• inputting a second input signal in the first power domain to the second NOR gate;
• and
• inputting an enable signal in a second power domain to the first and second NOR gates to enable the voltage level shifter.

An interface, comprising:

• a first buffer in a first power domain;
• and
• a voltage level shifter, comprising:
• a first NOR gate having a first input configured to receive a first input signal from the first buffer in the first power domain, a second input configured to receive an enable signal in a second power domain, a third input, and an output;
• and
• a second NOR gate having a first input configured to receive a second input signal in the first power domain, a second input configured to receive the enable signal in the second power domain, a third input coupled to the output of the first NOR gate, and an output coupled to the third input of the first NOR gate;
• wherein the first and second NOR gates are powered by a supply voltage of the second power domain.