Reconfigurable low pass filter with Automatic Frequency Tuning for WCDMA and GSM application

Author

Jiang, Chen ; Xie, Renzhong ; Li, Weinan ; Huang, Yumei ; Hong, Zhiliang

Author_Institution

State Key Lab. of ASIC & Syst., Fudan Univ., Shanghai, China

fYear

2011

fDate

25-28 Oct. 2011

Firstpage

1066

Lastpage

1069

Abstract

A reconfigurable baseband low-pass filter (LPF) with automatic cut-off frequency tuning for WCDMA and GSM application is presented. Cut-off frequencies of 2.1MHz and 200-KHz, and out of band IIP3 at least 20.8dBm and 22.7dBm are achieved under WCDMA and GSM mode respectively. The in band ripple is below 0.5dB in both modes. By utilizing digital frequency tuning technique, a cut-off frequency error of less than 2.5% is obtained. The total tuning time is about 5.5μs. The LPF is fabricated in SMIC 0.13μm CMOS technology with chip area of 0.35mm², and the current consumptions are 8.3mA and 1.1mA for WCDMA mode and GSM mode respectively under a power supply of 1.5V.

Keywords

CMOS digital integrated circuits; cellular radio; circuit tuning; code division multiple access; low-pass filters; radiofrequency filters; CMOS technology; GSM application; IIP3; SMIC; WCDMA application; automatic cut-off frequency tuning; current 1.1 mA; current 8.3 mA; cut-off frequency error; frequency 2.1 MHz; frequency 200 kHz; reconfigurable baseband LPF; reconfigurable low pass filter; size 0.13 mum; utilizing digital frequency tuning technique; voltage 1.5 V; Baseband; Chebyshev approximation; GSM; Multiaccess communication; Spread spectrum communication; Tuners;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC (ASICON), 2011 IEEE 9th International Conference on

Conference_Location

Xiamen

ISSN

2162-7541

Print_ISBN

978-1-61284-192-2

Electronic_ISBN

2162-7541

Type

conf

DOI

10.1109/ASICON.2011.6157392

Filename

6157392