“…Varactors are part of many RF integrated circuits, such as voltage controlled oscillators [1][2][3][4], whose resonance frequency diminishes with the varactor capacitance, C, as 1= ffiffiffiffiffi ffi LC p , where L stands for the LC tank inductance. Precise physical models for PN junction capacitances have been reported [5][6][7][8][9][10][11][12][13], but not for the junction parasitic resistances and, consequently, neither for the PN varactor quality factor.…”