| http://www.w3.org/ns/prov#value | - FIG. 5B is a circuit schematic of an polarity adjustable voltage source with circuit elements similar to that of FIG. 5A. However, as shown in FIG. 5B, the polarity control circuit signals, CA and CB, are used to control two independent adjustable polarity adjustable voltage source circuits 25, 26 with two corresponding polarity corrected output voltages VDA and VDIG. The first adjustable polarity
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