An antenna amount including first, second, and third plates is disclosed. The relatively low purity material is exposed to conditions under which at least a portion of the metal contained therein is converted to a salt that is more readily solvated in a provided solvent than the starting material, while at the same time not substantially increasing the solubility of at least one or more of the impurities in such selected solvent. The first differential pair and the second differential pair may each be a driven pair or a victim pair. A power detection evaluation circuit controls the RFVGA gain control signal based on a voltage value of the RFVGA gain control signal or a voltage value of the output signal from the RFVGA, and a voltage value of an output signal from the low-pass filter and a voltage value of an intermediate node of the low-pass filter. Any algorithm or statistical function may be applied to the group of input values to determine the range. The power supply further comprises a control circuit coupled to the first and second generators controlling the first and second phase outputs, wherein the first phase output and the second phase output are summed to provide a variable power supply to the load.