Stable level shifters in high slew rate or noisy environments

A method, comprising:

• driving a first transistor and a second transistor with a level shifter;
• biasing the first transistor and the second transistor with a bias current;
• detecting a slew of a voltage source;
• and
• responsive to determining that the slew exceeds a threshold, increasing the bias current.

A system, comprising:

• a level shifter coupled to a voltage source, a first transistor, and a second transistor;
• a first current source coupled to the first transistor and the second transistor and configured to bias the first transistor and the second transistor;
• a slew detector coupled to the voltage source and to the first current source, wherein the slew detector is configured to detect a change in voltage of the voltage source, and further configured to provide current to the first current source responsive to detecting the change;
• and
• a second current source coupled in parallel to the first current source, wherein the second current source is configured to provide current to the first current source responsive to a control signal.