A compensation technique for recycling folded-cascode amplifier

A compensation technique for recycling folded cascade (RFC) amplifier is presented. By applying the compensation technique, the proposed modified recycling folded cascade (MRFC) circuit achieves better slew rate and unity-gain frequency compared with RFC amplifier. The proposed circuit is designed using TSMC 0.18µm CMOS technology. The amplifier is verified with a 5.6pF output load under 1.8V power supply. When compared to the RFC amplifier, the proposed amplifier achieves 80MHz increment in unity-gain frequency (134.2MHz versus 214.3MHz), 13.4V/µs increment in slew rate (94.1V/µs versus 107.5 V/µs), and 19.6dB increment in dc gain (73.2dB versus 53.6dB). The power consumption of the amplifier is 870µW at a 1.8V supply.

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