Abstract
By using Gm-C compensation (GCC) technique, a two-stage recycling folded cascode (FC) operational transconductance amplifier (OTA) is designed. The proposed configuration consists of recycling structure, positive feedback and feed-forward compensation path. In comparison with the typical folded cascode CMOS Miller amplifier, this design has higher DC gain, unity-gain frequency (UGF), slew rate and common mode rejection ratio (CMRR). The presented OTA is simulated in 0.18-μm CMOS technology and the simulation results confirm the theoretical analyses. Finally, the proposed amplifier has a 111 dB open-loop DC gain, 20 MHz UGF and 145 dB CMRR @ 1.2 V supply voltage while the power consumption is 400 μW which makes it suitable for low-voltage applications.
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