A digital controller configured to inject a signal into a digital feedback path that facilitates regulation of a power converter and measure the corresponding phase, gain, or frequency. A circuit processes the outputs of the array of radiation detectors. The feed-forward determination module generates an EGR feed-forward value based on a difference between desired and measured mass air flow rates. The contact plug is formed on the source or the drain to connect the MOS transistors or one of the MOS transistors and one of the capacitor elements. The tine harrow assembly includes at least two transversely oriented rows of transversely spaced tines. There is a similar second array of needle-jet orifices, but with it the orifices are directed at the same angle but oppositely to the sprays of the first array.