The　improvement　of　a　conventional　Gyrator-C　active　inductor　consisting　of　common-emitter　configured　and　common-collector　configured　with　resistance　feedback　is　presented.　The　fixed　passive　resistor　is　replaced　with　tunable　active　resistor　(TAR)　to　enhance　the　adjustability　of　the　active　inductor.　Multi-regulated　Cascode　(MRC)　circuit　is　applied　to　boost　quality　factor　Q.　Compared　with　the　conventional　active　inductor,　the　effective　inductance　and　Q　can　be　tuned　by　changing　the　equivalent　resistance　of　TAR　or　the　bias　current　of　the　transistor,　moreover,　the　resonant　frequency　is　also　be　shifted,　as　well　as　the　frequency　that　quality　factor　Q　arriving　at　maximum.　In　addition,　quality　factor　Q　of　the　improved　active　inductor　is　boosted　noticeably.　The　maximum　Q　of　the　improved　active　inductor　can　arrive　at　526.　The　improved　active　inductor　instead　of　spiral　inductors　can　be　applied　to　filters,　low　noise　amplifiers,　voltage　control　oscillators　for　small　area,　reconfigurable　and　intelligent　RF　front-end.　©　2014　IFSA　Publishing,　S.　L.