A plasma-generating device, comprising: a driver network for providing an AC signal including a power supply, an AC output stage, a direct digital synthesis device, a sensor component, an impedance matching network and a controller; a housing in fluid communication with a source of an ionizable gas and including a passage defined therein configured to direct a flow of the ionizable gas therethrough; a first electrode in communication with the ionizable gas flowing through the passage of the housing; and a resonant circuit including a capacitor and an inductor connected together in series, the resonant circuit having a resonance frequency and being electrically coupled to the first electrode, wherein the resonant circuit is configured to receive the AC signal having an excitation frequency to excite the ionizable gas flowing through the passage of the housing to a plasma, wherein: the driver network is electrically coupled to the resonant circuit through the impedance matching network, the impedance matching network configured to match an internal impedance of the driver network to an effective impedance of at least one of the resonant circuit when exciting the ionizable gas to the plasma and the resonant circuit when not exciting the ionizable gas to the plasma; the controller is configured to control the driver network and the AC signal supplied to the resonant circuit, the power supply is configured to supply power using a DC signal to the AC output stage, the AC output stage is configured to convert the DC signal to the AC signal supplied to the resonant circuit through the impedance matching network using a reference signal from direct digital synthesis device, the sensor component is configured to receive data from a sensor placed between the capacitor, the first electrode and the inductor, and the sensor component is coupled to the AC output stage and is configured to provide an output to the controller to permit the controller to determine the reflected and forward power. a driver network for providing an AC signal including a power supply, an AC output stage, a direct digital synthesis device, a sensor component, an impedance matching network and a controller; a housing in fluid communication with a source of an ionizable gas and including a passage defined therein configured to direct a flow of the ionizable gas therethrough; a first electrode in communication with the ionizable gas flowing through the passage of the housing; and a resonant circuit including a capacitor and an inductor connected together in series, the resonant circuit having a resonance frequency and being electrically coupled to the first electrode, wherein the resonant circuit is configured to receive the AC signal having an excitation frequency to excite the ionizable gas flowing through the passage of the housing to a plasma, wherein: the driver network is electrically coupled to the resonant circuit through the impedance matching network, the impedance matching network configured to match an internal impedance of the driver network to an effective impedance of at least one of the resonant circuit when exciting the ionizable gas to the plasma and the resonant circuit when not exciting the ionizable gas to the plasma; the controller is configured to control the driver network and the AC signal supplied to the resonant circuit, the power supply is configured to supply power using a DC signal to the AC output stage, the AC output stage is configured to convert the DC signal to the AC signal supplied to the resonant circuit through the impedance matching network using a reference signal from direct digital synthesis device, the sensor component is configured to receive data from a sensor placed between the capacitor, the first electrode and the inductor, and the sensor component is coupled to the AC output stage and is configured to provide an output to the controller to permit the controller to determine the reflected and forward power. the driver network is electrically coupled to the resonant circuit through the impedance matching network, the impedance matching network configured to match an internal impedance of the driver network to an effective impedance of at least one of the resonant circuit when exciting the ionizable gas to the plasma and the resonant circuit when not exciting the ionizable gas to the plasma; the controller is configured to control the driver network and the AC signal supplied to the resonant circuit, the power supply is configured to supply power using a DC signal to the AC output stage, the AC output stage is configured to convert the DC signal to the AC signal supplied to the resonant circuit through the impedance matching network using a reference signal from direct digital synthesis device, the sensor component is configured to receive data from a sensor placed between the capacitor, the first electrode and the inductor, and the sensor component is coupled to the AC output stage and is configured to provide an output to the controller to permit the controller to determine the reflected and forward power.