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采用差分电桥，超导磁体和双氦池等技术研制成功高灵敏的量子电容谱测试系统，系统灵敏度高达０．００１ＰＦ，系统信噪比在测试频率大于１００Ｈｚ、被测信号为１０ＰＦ时高达１５０。
Using differential bridge, superconducting magnet and double helium pool and other technologies developed highly sensitive quantum capacitance spectroscopy test system, the system sensitivity up to 0.001PF, the system signal to noise ratio in the test frequency is greater than 100Hz, the measured signal is 10PF up to 150 .