Multiplexing for Systems with Multiple Supply Sources

A method, comprising:

• applying a control signal to an inverter element of a multiplexer;
• in response to the control signal, inverting a signal input to at the inverter;
• applying the inverted signal to a first terminal of a first gate element;
• and
• in response to the inverted signal, restricting signal flow across the first gate element.

A circuit comprising;

• a first transistor;
• a second transistor connected in series with the first transistor, the first and second transistors situated in a mirrored configuration;
• a third transistor connected in parallel with the first and second transistors;
• and
• an inverter to, in a first mode, pass a signal input from a signal source and provide the signal to the gate of the first transistor;
• where the second transistor receives a control signal, the third transistor and the second transistor to switch the circuit among the first mode in which transmission is allowed and a second mode in which transmission is restricted based on the control signal.