Cancellation of Series-Loss Resistance in UWB Active Inductors using RC Feedback

One of the most important features of the active inductors (ais) is their input equivalent resistance, namely series-loss resistance, which should be low enough to have a high quality factor (qf). most of the previous methods by this goal did not yield a high enough qf. this paper presents a new method, namely applying an rc feedback, to cancel series-loss resistance entirely. as the rc feedback cancels series-loss resistance, it enhances the self-resonant frequency (srf) as well. the srf of the ai has a range as high as 0.25-12.5 ghz. compared to the previous reports, the qf has been improved by applying the rc feedback. the structure is such that the qf can be adjusted independent of the srf.