Abstract
A new technique for improving the transconductance and low frequency output impedance of recycling folded cascode (RFC) amplifiers is presented. This enhancement was achieved by using a positive feedback and upgrading the recycling structure. The new structure profits from better transconductance, slew rate, and DC gain in comparison with conventional folded cascode (FC) amplifier. Moreover, the input referred noise is reduced and the phase-margin improved. The enhanced amplifier, simulated in 0.18μm CMOS technology, exhibits a DC gain enhancement of 16.3dB as well as 115.5MHz increase in gain bandwidth compared to conventional FC configuration. The amplifier consumes 360μW @ 1.2V which makes it suitable for low-voltage applications.
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