Title :
An improved recycling folded cascode amplifier with gain boosting and phase margin enhancement
Author :
Ahmed, Moaaz ; Shah, Ikramullah ; Fang Tang ; Bermak, Amine
Author_Institution :
Dept. of ECE, Hong Kong Univ. of Sci. & Technol., Hong Kong, China
Abstract :
An improved recycling folded cascode operational transconductance amplifier with gain boosting and enhanced phase-margin is proposed. Among four variants of folded cascode amplifiers that have been implemented in TSMC 0.18μm CMOS process under same power and area constraints, the proposed amplifier achieves the lowest settling error of less than 0.5% compared to 1.1% settling error by Improved Recycling Folded Cascode (IRFC), 1.4% settling error by Recycling Folded Cascode (RFC) and 30% settling error by conventional Folded Cascode (FC) amplifier. This performance enhancement is attributed to 30dB increment in low-frequency gain and 7° improvement in the phase margin when compared with the second best performing Improved Recycling Folded Cascode amplifier.
Keywords :
CMOS integrated circuits; operational amplifiers; TSMC CMOS process; gain boosting; improved recycling folded cascode amplifier; low-frequency gain; operational transconductance amplifier; phase margin enhancement; settling error; size 0.18 mum; CMOS process; Gain; Mirrors; Noise; Recycling; Transconductance; Transistors; Gain boosting; Improved recycling folded cascode amplifier; phase margin enhancement;
Conference_Titel :
Circuits and Systems (ISCAS), 2015 IEEE International Symposium on
Conference_Location :
Lisbon
DOI :
10.1109/ISCAS.2015.7169186
