An offset compensated and high-gain CMOS current-feedback op-amp

Versatile composite amplifier configuration

“…The resulting configuration can be viewed as a high-performance CFA that can be assembled using readily available components for immediate implementation. This is in direct contrast with the CMOS-based CFAs (Assi et al, 1998;Ismail & Soliman, 2000;Maundy, Sarkar, & Gift, 2006), which are usually in-house fabrications that are not available commercially.…”

A CMOS based operational floating current conveyor

“…The second one is the negative second generation current conveyor CCII-in which the current is copied with the same magnitude but out of phase from low impedance to a high impedance node as shown in figure 2 [2]. [5] David Nelson was the first one to design the current feedback amplifier (CFA) based on the CCII+.It was designed by using the same topology as a CCII followed by a buffer, as shown in figure 3 [6][7][8]. Figure 3: CFA block diagram [6] As the CCII used to be a part of the current-feedback amplifier circuit construction; the CFA was also used as a part the operational floating conveyor OFC that was introduced by Toumazou, Payne, and Lidgey as shown in figure 4 [9].…”

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

“…The low-input offset voltage is considered as an important aspect of the performance of an amplifier especially when signals are in the range of few hundred micro volts [4]. Several CMOS realizations for the CFOA have been reported in the literature [5][6][7][8][9][10][11][12]. The design still suffers from many drawbacks such as high distortion, high noise, high consumption of power and complex circuitry.…”