Analysis and implementation of an improved recycling folded cascode amplifier

A generally improved recycling folded cascode (IRFC) is analyzed and implemented. Analysis and comparisons among the IRFC, the original recycling folded cascode (RFC) and the conventional folded cascode (FC) are made, and it is shown that with the flexible structure of IRFC, significant enhancement in transconductance, slew rate and noise can be achieved. Prototype amplifiers were fabricated in 0.13 μm technology. Measurement shows that IRFC has 3× enhancement in gain-bandwidth and slew rate over conventional FC, and the enhancement is 1.5× when compared with the RFC.

[1]  José Silva-Martínez,et al.  The Recycling Folded Cascode: A General Enhancement of the Folded Cascode Amplifier , 2009, IEEE Journal of Solid-State Circuits.

[2]  P.R. Kinget,et al.  A 0.5-V 8-bit 10-Ms/s Pipelined ADC in 90-nm CMOS , 2008, IEEE Journal of Solid-State Circuits.

[3]  Willy Sansen,et al.  analog design essentials , 2011 .

[4]  Ramón González Carvajal,et al.  A free but efficient low-voltage class-AB two-stage operational amplifier , 2006, IEEE Transactions on Circuits and Systems II: Express Briefs.

[5]  E. Zhian-Tabasy,et al.  Slew rate enhancement method for folded-cascode amplifiers , 2008 .

[6]  A. Tekin,et al.  A Differential-Ramp Based 65 dB-Linear VGA Technique in 65 nm CMOS , 2009, IEEE Journal of Solid-State Circuits.