Different operational transconductance amplifier topologies for obtaining very small transconductances. - Anand Veeravalli; Edgar Sánchez-Sinencio; José Silva-Martínez (ISCAS, 2000)

Transconductance amplifier structures with very small transconductances: a comparative design approach. - Anand Veeravalli; Edgar Sánchez-Sinencio; José Silva-Martínez (IEEE J. Solid State Circuits, 2002)

A CMOS transconductance amplifier architecture with wide tuning range for very low frequency applications. - Anand Veeravalli; Edgar Sánchez-Sinencio; José Silva-Martínez (IEEE J. Solid State Circuits, 2002)