Pilot fuel injection andor ignition are controlled in a pilot ignited, gas-fueled, compression ignition engine so as to maintain a relationship DpDi of <1, where Dp is the duration of the pilot injection event and Di is the ignition delay period as measured from the start of initiation of pilot fuel injection to the start of pilot fuel autoignition. A second coil structure is formed over the substrate adjacent to the first coil structure. The software component may then configure a power supply, based on the voltage setting retrieved from the voltage selection table, to supply the component with an optimal supply voltage. The back surface of the chip is adhered to the die pad. The reference arm path length adjustment module is configured to automatically adjust the reference arm path length such that the reference arm path length is based on an eye diameter of the subject.