A CMOS continuous-time active biquad filter for gigahertz-band applications

Author

Chang, Yuyu ; Choma, John, Jr. ; Wills, Jack

Author_Institution

Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA, USA

Volume

2

fYear

1999

fDate

36342

Firstpage

656

Abstract

A general high-Q biquad filter architecture capable of operating in the GHz range is proposed and analyzed. This filter, which is usable in bandpass and low-pass applications, utilizes two effective Q-enhancement techniques to circumvent the low-Q characteristics inherent in the circuit. Simulation results employing standard 0.5 μm CMOS technology have successfully verified that the center frequency tuning and hybrid Q-tuning techniques operate between 1 GHz to 2.3 GHz center frequencies with Q ranging from 4.8 to over 1000. A tunable bandpass filter with a center frequency at 1.5 GHz and a low-pass filter with a center frequency at 2.07 GHz each having Q equal to 31 have been designed to have 63 dB and 44 dB input dynamic range, and power dissipation equal to 30.5 mW and 27.8 mW, respectively

Keywords

CMOS analogue integrated circuits; Q-factor; UHF filters; UHF integrated circuits; band-pass filters; biquadratic filters; circuit tuning; continuous time filters; linear network synthesis; low-pass filters; 0.5 micron; 1 to 2.3 GHz; 27.8 mW; 30.5 mW; CMOS active biquad filter; CMOS continuous-time filter; Q-enhancement techniques; UHF IC; active filters; bandpass applications; center frequency tuning; gigahertz-band applications; high-Q biquad filter architecture; hybrid Q-tuning technique; low-pass filter; lowpass applications; tunable band-pass filter; Active filters; Band pass filters; CMOS technology; Circuit optimization; Circuit simulation; Dynamic range; Frequency; Low pass filters; Tunable circuits and devices; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on

Conference_Location

Orlando, FL

Print_ISBN

0-7803-5471-0

Type

conf

DOI

10.1109/ISCAS.1999.780850

Filename

780850