Abstract
ld have referred to [2] which
reports a voltage mode topology that is much like the current-mode
filter presented in [1]. This was an unintentional negligence and we
sincerely apologize for it. Although the transistor configuration is al-
Manuscript received November 17, 2010. Date of publication January 06,
2011; date of current version January 28, 2011.
The authors are with the Dipartimento di Elettronica, Università degli Studi
di Pavia, 27100 Pavia, Italy (e-mail: antonio.liscidini@unipv.it).