To accurately measure electrostatic discharge energy, a resistive-capacitive voltage discharge approach was used to measure the parasitic capacitance in a circuit. As a result, an output-stage parasitic capacitance in the circuit during the discharge process and a non-negligible storage-stage parasitic capacitance during the charging process were identified. By comparing the data obtained from the resistive-capacitive discharge voltage model and spark current RCL circuit model, the maximum relative deviation from the total circuit capacitance was 5.4% for both approaches. A model based on graded-stage parasitic capacitance was established to analyze the effect of this capacitance on discharge energy. The energy stored in the charging process increased because of the storage-stage parasitic capacitance, and the discharge energy decreased because of the output-stage parasitic capacitance. The energy calculated by the graded parasitic capacitance model was larger than that calculated by the single-stage parasitic capacitance model, with a maximum relative deviation of 36.7% under the test conditions. The smaller the charging capacitor, the more evident the effect of the parasitic capacitance on the discharge energy.

为了准确测量静电放电能量，使用阻容电压放电方法来测量电路中的寄生电容。结果，确定了放电过程中电路中的输出级寄生电容和充电过程中不可忽略的存储级寄生电容。通过比较从阻容放电电压模型和火花电流 RCL 电路模型获得的数据，两种方法与总电路电容的最大相对偏差为 5.4%。建立基于分级寄生电容的模型，分析该电容对放电能量的影响。由于存储级寄生电容，充电过程中存储的能量增加，由于输出级寄生电容，放电能量降低。分级寄生电容模型计算的能量大于单级寄生电容模型计算的能量，在测试条件下最大相对偏差为36.7%。充电电容越小，寄生电容对放电能量的影响越明显。