In one example, a method includes selectively activating, by control logic and based on a control signal, a switch; in response to determining that an electrical characteristic of a signal provided to the switch satisfies a threshold while the switch is deactivated, activating, by the control logic and regardless of the control signal, the switch until determining that a potential of the signal provided to the switch satisfies a threshold potential; and in response to determining that the potential of the signal provided to the switch satisfies the threshold potential, deactivating the switch.