Abstract: In accordance with an embodiment, monolithically-integrated circuit includes a radio frequency (RF) switch; a first terminal configured to receive a first reference voltage signal for an ON-state of the RF switch; a second terminal configured to receive a second reference voltage signal for an OFF-state of the RF switch; decoder circuitry configured to decode a control sequence encoded in at least one of the first and the second voltage signals for controlling a switch state of the RF switch; and level-shifter circuitry configured to adjust, based on the control sequence, the switch state of the RF switch by selectively level-shifting a voltage level of one of the first reference voltage signal or the second reference voltage signal, and supplying the level-shifted first reference voltage signal or the level-shifted second reference voltage signal to the RF switch.