A low power variable GBW opamp from 60MHz to 2GHz for multi-standard receivers

Author

Atac, Aytac ; Harder, Christian ; Wunderlich, Ralf ; Heinen, Stefan

Author_Institution

Integrated Analog Circuits & RF Syst., RWTH Aachen Univ., Aachen, Germany

fYear

2012

fDate

9-12 Dec. 2012

Firstpage

1

Lastpage

4

Abstract

This paper presents a fully differential low power operational amplifier (opamp) with a variable gain bandwidth (GBW) product, ranging from 60MHz to 2GHz. The design is targeted for the filter design of continuous time wide band multi-mode ΔΣ ADC´s and variable baseband filters within the low power multi-standard receivers. For the first time in literature, the offered opamp achieves 5 different GBW products 66/131/578/1080/2040MHz when loaded with high capacitive loads of 8/4/2/2/1pF differentially and by only consuming 260/410/790/1500/1900μA respectively from a 1.2V supply. The achieved figure of merit (FOM) performance is 2-3 times better than the state of the art opamps while offering a very wide GBW tuning range from 60MHz to 2GHz. The achieved performance results are given after post layout and Monte Carlo simulations, by using UMC 130nm CMOS technology.

Keywords

CMOS integrated circuits; Monte Carlo methods; UHF amplifiers; UHF filters; VHF amplifiers; VHF filters; analogue-digital conversion; delta-sigma modulation; low-power electronics; operational amplifiers; radio receivers; Monte Carlo simulations; UMC CMOS technology; capacitance 1 pF; capacitance 2 pF; capacitance 4 pF; capacitance 8 pF; capacitive loads; continuous time wideband multimode ΔΣ ADC; current 1500 muA; current 1900 muA; current 260 muA; current 410 muA; current 790 muA; filter design; frequency 60 MHz to 2 GHz; fully differential low power operational amplifier; low power multistandard receivers; low power variable GBW opamp; post layout; size 130 nm; variable baseband filters; variable gain bandwidth product; voltage 1.2 V; Bandwidth; CMOS integrated circuits; Layout; Receivers; Standards; Transistors; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems (ICECS), 2012 19th IEEE International Conference on

Conference_Location

Seville

Print_ISBN

978-1-4673-1261-5

Electronic_ISBN

978-1-4673-1259-2

Type

conf

DOI

10.1109/ICECS.2012.6463715

Filename

6463715