Title :
A Low Power Dual-Mode Sigma-Delta Modulator for GSM/WCDMA Receivers
Author :
Lee, Inhee ; Chae, Youngcheol ; Han, Gunhee
Author_Institution :
Yonsei Univ., Seoul
Abstract :
This paper proposes a low power dual-mode sigma- delta (SigmaLambda) modulator for GSM and WCDMA receivers. The proposed modulator satisfies both standards by modifying the transfer function without changing sampling frequency or the loop order. The simulation results show 85 dB dynamic range for a GSM mode and 55 dB for a WCDMA mode. The proposed modulator is designed in a 0.35 mum CMOS process and consumes 5.5 mW of power under 1.8-V supply.
Keywords :
CMOS integrated circuits; broadband networks; cellular radio; code division multiple access; low-power electronics; radio receivers; sigma-delta modulation; CMOS process; GSM; WCDMA receiver; low power dual-mode sigma-delta modulator; power 5.5 mW; size 0.35 mum; voltage 1.8 V; wideband code division multiple access; CMOS process; Delta modulation; Delta-sigma modulation; Dynamic range; Frequency locked loops; GSM; Multiaccess communication; Power supplies; Sampling methods; Transfer functions;
Conference_Titel :
Electronics, Circuits and Systems, 2007. ICECS 2007. 14th IEEE International Conference on
Conference_Location :
Marrakech
Print_ISBN :
978-1-4244-1377-5
Electronic_ISBN :
978-1-4244-1378-2
DOI :
10.1109/ICECS.2007.4511199
