| http://www.w3.org/ns/prov#value | - The DC-DC converter 9 is arranged such that the output voltage of the rectifier 1 is turned on and off at a high speed with the aid of the transistor Q4 so that voltage v4 at the output capacitor C4 becomes equal to a preset value of kVR, where k is a constant, and VR is the voltage of the reference voltage source 11.
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