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A new technique is proposed for the determination of the parameters of the capacitance-voltage relationships of the p-n junction varactor. Special charts are used in conjunction with the measured values of varactor capacitance at five bias voltages. The determination of the Fourier capacitance coefficients of the pumped varactor is then discussed, another chart being used, in conjunction with the parameters of the capacitance voltage relationship, to determine values for these coefficients. The chart is applicable to voltage and current pumping. Experimentally-determined capacitance coefficients are compared with those obtained using the chart.