Fully differential variable gain instrumentation amplifier based on a fully differential DDA topology. - António J. Gano; José E. Franca (ICECS, 1999)

New multiple input fully differential variable gain CMOS instrumentation amplifier. - António J. Gano; José E. Franca (ISCAS, 2000)

Fully differential CMOS programmable analogue sensor interface based on fully differential multiple differences amplifiers. - António J. Gano; Nuno F. Especial (ICECS, 2001)