Title :
A 1.2V 110-MHz-UGB differential class-AB amplifier in 65nm CMOS
Author :
Visweswaran, Akshay ; Long, John R. ; Staszewski, Robert Bogdan
Author_Institution :
Electron. Res. Lab., Delft Univ. of Technol., Delft, Netherlands
Abstract :
A wideband, fully differential, 3-stage class-AB amplifier capable of operation at rates beyond 100 Mbps is described. Common-mode feedback is applied to increase output drive capability and reduce bias-dependent crossover distortion when operating in class-AB from a low supply voltage. Drawing 3.9mA from a nominal VDD of 1.2V in 65nm CMOS, the 0.052mm2 amplifier delivers 1.6V swing across a 50Ω load with THD+N of 82.6dB at 150kHz in the unity-gain configuration.
Keywords :
CMOS integrated circuits; differential amplifiers; feedback amplifiers; wideband amplifiers; CMOS; UGB differential class-AB amplifier; bias-dependent crossover distortion reduction; common-mode feedback; current 3.9 mA; frequency 110 MHz; frequency 150 kHz; low supply voltage; output drive capability; resistance 50 ohm; size 65 nm; unity-gain configuration; voltage 1.2 V; voltage 1.6 V; wideband differential 3-stage class-AB amplifier; Bandwidth; CMOS integrated circuits; Capacitance; Distortion measurement; Impedance; Noise; Transistors;
Conference_Titel :
Custom Integrated Circuits Conference (CICC), 2014 IEEE Proceedings of the
Conference_Location :
San Jose, CA
DOI :
10.1109/CICC.2014.6946066
