Patent ID: 8638121

Claim:
A device comprising: first, second and third power supply lines supplied respectively with first, second and third power voltages that are different from one another; first and second input terminals and an output terminal; an output circuit coupled to the first power supply line, the first and second input terminals and the output terminal; a first inverter including an input node coupled to the first input terminal and an output node coupled to the second input terminal; a first transistor coupled in series to the first inverter between the second and third power supply lines, the first transistor being rendered non-conductive to deactivate the first inverter and conductive to activate the first inverter; and a control circuit configured to prevent the output terminal from being brought into an electrical floating state during deactivation of the first inverter: wherein the first power supply line is continuously supplied with the first voltage during both activation and deactivation of the first inverter.