In a non-insulated DC-DC converter having a circuit in which a power MOS\u2022FET high-side switch and a power MOS\u2022FET low-side switch are connected in series, the power MOS\u2022FET low-side switch and a Schottky barrier diode to be connected in parallel with the power MOS\u2022FET low-side switch are formed within one semiconductor chip. The transform is such that 0 is the most likely coefficient amplitude and 1 is the next most likely coefficient amplitude. The pivotal device includes a screw and a nut. The scintillators are characterized by high light output, reduced afterglow, short decay time, and high X-ray stopping power.