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D Marioli,E Sardini and A Taroni,High-accuracy measurement techniques for capacitance transducers,Meas.Sci.Technol.4 (1993) 337-343. 李锻炼;向平;何明一;抗寄生干扰的小电容测量电路研究;仪表技术与传感器;1997-07.