(1)C.S.Vaucher and D.Kasperkovitz. "A wide-band tuning system for fully integrated satellite receiver"IEEE J.Solid-state circuits vol 33pp 987-998,July 1998
(2)N.H Sheng et al."A high-speed multimodulus HBT prescalar for the frequency synthesizer applications".IEEE J.Solid-state circuits vol 26pp 1362-1367,Oct 1991