负阻抗变换器(negative impedance converter,NIC)是单埠运算放大器电路,有负阻抗特性,会将能量加到电路中,和一般负载消耗能量的情形恰好相反。负阻抗变换器的实现方式是量测一个串联电阻等效正阻抗上的电压降,再依电压降计算,加上其压降的负值。
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