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

fYear

2014

fDate

15-17 Sept. 2014

Firstpage

1

Lastpage

4

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 V_DD 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;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference (CICC), 2014 IEEE Proceedings of the

Conference_Location

San Jose, CA

Type

conf

DOI

10.1109/CICC.2014.6946066

Filename

6946066