S. Pipilos et Y. Tsividis, RLC ACTIVE-FILTERS WITH ELECTRONICALLY TUNABLE CENTER FREQUENCY AND QUALITY FACTOR, Electronics Letters, 30(6), 1994, pp. 472-474
The Letter discusses techniques for the electronic tuning of inductors
and capacitors, and for the active compensation of their losses and t
hus the enhancement of their quality factors. Applications to integrat
ed RLC filters using on-chip inductors are considered.