Application of the active inductor circuit (AI) based band pass Filter (BPF)

A novel active inductor approach, which can improve the quality-factor, was presented in this report. A current reuse active inductor circuit topology was proposed, which can substantially improve its equivalent inductance. This active inductor was implemented by using a 0.13um- CMOS technology, which gives a maximum quality-factor of 1.45 with a 40 nH at 2.259GHz. An optimized differential topology of an RF active filter and its performances are presented. It make use of negative resistance and fully differential in order to independently tune the central frequency and the quality factor with a minimum power consumption of 1.98 mW. The principle seems to be sufficiently general to be used for other active filters single–ended or differential topologies based on simulated inductors