Any good anagrams for frequency dependent negative resistor?

A frequency dependent negative resistor (FDNR) is a circuit element that exhibits a purely real negative resistance -1/(ω2kC) that decreases in magnitude at a rate of -40 dB per decade. The element is used in implementation of low-pass active filters modeled from ladder filters. The element is usually implemented from a generalized impedance converter (GIC) or gyrator. The impedance of a FDNR is Z = 1 s 2 k C {\displaystyle Z={\frac {1}{s^{2}\mathrm {kC} }}} or Z = − 1 ω 2 k C {\displaystyle Z={\frac {-1}{\omega ^{2}\mathrm {kC} }}} when s = jω. The definition and application of frequency dependent negative resistors is discussed in Temes & LaPatra, Chen and Wait, Huelsman & Korn. The technique is attributed to L. T. Bruton.

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