Abstract
An improved recycling structure for an operational transconductance amplifier is proposed. The proposed structure separates the AC path from the DC path, and achieves a significant boost in transconductance under the same power and area budget. A folded-cascode amplifier employing the improved recycling structure was implemented in SMIC standard 0.13 μm CMOS process. Simulation results show that the enhancement of transconductance leads to 230% improvement in gain-bandwidth product and 13 dB boost in gain compared with the conventional folded cascode.
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