A New Design Technique of CMOS Current Feed Back Operational Amplifier (CFOA)

A novel Nth-order voltage-mode universal filter based on CMOS CFOA

“…. ., n) represent R j and C j in proposed filter circuit, and we use A · S xyz = S a to replace (9). So we can calculate sensitivities of Nth-order low-pass filter circuit by A and S a .…”

“…The fully integrated continuous time filter has been successfully applied in ICs for communication, significant efforts have been devoted to study of MOS transistor-only (MOS-only) active components [9][10][11] and filter circuits. The CMOS CFOAs are used to design Nth-order universal filter circuit in this article.…”

Design and stability analysis of CFOA-based amplifier circuits using Bode criterion

“…In the past 10 years current-feedback operational amplifiers (CFOAs) have been basically used as active building blocks for design of high-speed amplifiers. As a kind of the monolithic operational amplifiers (op amps) family, the CFOAs have been realized to overcome the finite gain-bandwidth product of the conventional voltage-feedback operational amplifiers (VFOAs) (Jassim, 2013;Seifart, 2003). However, the CFOA-based amplifier circuits are less understood and documented in comparison with the amplifiers using VFOAs.…”

“…A relatively large number of books, publications and company application reports are devoted to the theory and the design of the amplifier circuits employing CFOAs (Jassim, 2013;Jung, 2002;Kamath, 2014;Mancini, 2001Mancini, , 2002Palumbo, 1997;Pandiev, 2012;Safari & Azhari, 2012;Schmid, 2003;Seifart, 2003;Texas Instruments, 2002;Tietze & Schenk, 2008). The authors' attention is focused on the structure and principle of operation at d.c. and large frequency range (Jung, 2002;Safari & Azhari, 2012;Seifart, 2003;Tietze & Schenk, 2008).…”

“…However, for the analysis of basic amplifier circuits a simplified model of the CFOA is used. The attention of the author in Jassim (2013) is focused on the design technique, employing CMOS CFOA. Some results on the behaviour of the non-inverting amplifier are given, which also confirm the efficiency of the designed CMOS CFOA.…”