| http://www.w3.org/ns/prov#value | - Note that the switching circuit and the arrangement on the primary side of each transformer can take the forms shown in FIGS. 6, 7, 9, 11, and 12. [0117] (Sixth Embodiment) [0118]FIG. 20 is a circuit diagram showing a circuit to which the sixth embodiment of the present invention can be applied. [0119] Referring to FIG. 20, this circuit includes switching elements 701 to 704 constituted by MOSFETs
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