Title :
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
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;
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
DOI :
10.1109/ICECS.2012.6463715
