A High Q Gm-C Filter for Multi-band Wireless Applications

Author

Gao, Zhi-Qiang ; Yu, Ming-yan ; Lai, Feng-Chang ; Ye, Yi-Zheng

Author_Institution

Microelectron. Center, Harbin Inst. of Technol.

fYear

2006

fDate

2006

Firstpage

1733

Lastpage

1735

Abstract

In this paper, a full CMOS six-order Gm-C Chebyshev filter based on passive LC-ladder synthesis is designed in TSMC standard 0.25mum CMOS process, which uses a highly linear operational transconductance amplifier (OTA) based on cross-coupled differential pairs, which exhibits a wide product of gain and bandwidth. A common-mode feedback (CMFB) with improved stability is introduced. The simulated results show the center frequency tuning range of the filter is from about 1.5MHz to 11 MHz and the maximum quality factor of 150 at the center frequency 6MHz. The filter is suitable for multi-band wireless applications

Keywords

CMOS integrated circuits; Chebyshev filters; Q-factor; ladder filters; mobile communication; operational amplifiers; passive filters; 0.25 micron; CMOS process; CMOS six-order Chebyshev filter; Gm-C Chebyshev filter; OTA; common-mode feedback; cross-coupled differential pairs; high Q Gm-C filter; highly linear operational transconductance amplifier; multiband wireless applications; passive LC-ladder synthesis; quality factor; Band pass filters; Bandwidth; CMOS process; Chebyshev approximation; Differential amplifiers; Frequency; Nonlinear filters; Operational amplifiers; Passive filters; Transconductance;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State and Integrated Circuit Technology, 2006. ICSICT '06. 8th International Conference on

Conference_Location

Shanghai

Print_ISBN

1-4244-0160-7

Electronic_ISBN

1-4244-0161-5

Type

conf

DOI

10.1109/ICSICT.2006.306409

Filename

4098526