A Low Power Dual-Mode Sigma-Delta Modulator for GSM/WCDMA Receivers

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.

[1]  Jen-Shiun Chiang,et al.  Dual-mode sigma-delta modulator for wideband receiver applications , 2003, Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03..

[2]  Hannu Tenhunen,et al.  A Triple-Mode Sigma-Delta Modulator for Multi-Standard Wireless Radio Receivers , 2006 .

[3]  Jere Järvinen,et al.  A 1.2V Dual-Mode GSM/WCDMA - Modulator in 65nm CMOS , 2006, 2006 IEEE International Solid State Circuits Conference - Digest of Technical Papers.

[4]  A. Dezzani,et al.  A 1.2-V dual-mode WCDMA/GPRS /spl Sigma//spl Delta/ modulator , 2003, 2003 IEEE International Solid-State Circuits Conference, 2003. Digest of Technical Papers. ISSCC..

[5]  Eric Andre,et al.  3.3 A 1.2-V Dual-Mode WCDMA/GPRS Σ∆ Modulator , 2003 .

[6]  J. A. Michell,et al.  Fully pipelined TSPC barrel shifter for high-speed applications , 1995 .

[7]  Bernhard E. Boser,et al.  The design of sigma-delta modulation analog-to-digital converters , 1988 .

[8]  R. Schreier,et al.  Delta-sigma data converters : theory, design, and simulation , 1997 .

[9]  M. Ismail,et al.  A low power multi-standard sigma-delta ADC for WCDMA/GSM/Bluetooth applications , 2004, The 2nd Annual IEEE Northeast Workshop on Circuits and Systems, 2004. NEWCAS 2004..