An Improved Recycling Folded-Cascode Amplifier with High Unity-Gain Frequency

An improved recycling folded cascode (IRFC) operational transconductance amplifier (OTA) is described in this paper. By applying the damping-factor-control (DFC) compensation technique for recycling folded cascode amplifier, the unity-gain frequency and dc gain are improved significantly. The proposed amplifier has been implemented using TSMC 0.18µm CMOS process. According to the simulation results, the proposed amplifier achieved 157MHz in unity-gain frequency and 90.1dB in dc gain while driving the same 5.6pF load.