The magnitude of the source impedance can affect the noise performance of the feedback coulombmeter.
源阻抗的大小能够影响反馈库仑计的噪声性能。
A new signal source for electric impedance tomography system is developed to improve the high-frequency performance and to reduce the noise level of the old one.
目的研制用于电阻抗断层成像系统的信号源，提高现有系统的高频特性，同时降低其噪声水平。
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