A wide-band active-RC filter with a fast tuning scheme for wireless communication receivers

Author

Lim, Jinup ; Cho, Youngjoo ; Jung, Kyungsoo ; Park, Jongmin ; Choi, Joongho ; Kim, JaeWhui

Author_Institution

Dept. of Electr. & Comput. Eng., Seoul Univ., South Korea

fYear

2005

fDate

18-21 Sept. 2005

Firstpage

637

Lastpage

640

Abstract

The paper presents the design of a wide-band active-RC filter with a fast tuning circuit for wireless communication receiver applications. The filter topology is the 5^th-order Chebyshev-II lowpass filter type and the programmable bandwidth can be extended up to 10MHz while the stopband attenuation larger than 40dB is obtained. The successive approximation register (SAR) scheme is incorporated for a prompt on-chip tuning operation that should be needed for compensating RC variations. The filter is fabricated in a 0.18-μm standard digital CMOS technology and dissipates 20.7mW for a supply voltage of 1.8V. The measured 3^rd-order harmonic input intercept point (IIP3) is larger than 32dBm.

Keywords

CMOS digital integrated circuits; Chebyshev filters; RC circuits; active filters; circuit tuning; low-pass filters; mobile communication; radio receivers; 0.18 micron; 1.8 V; 20.7 mW; Chebyshev-II filter; active-RC filter; digital CMOS technology; fast tuning circuit; fast tuning scheme; filter topology; harmonic input intercept point; lowpass filter; on-chip tuning; programmable bandwidth; stopband attenuation; successive approximation register; wide-band filter; wireless communication receivers; Attenuation; Bandwidth; CMOS technology; Chebyshev approximation; Circuit optimization; Circuit topology; Filters; Registers; Wideband; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference, 2005. Proceedings of the IEEE 2005

Print_ISBN

0-7803-9023-7

Type

conf

DOI

10.1109/CICC.2005.1568750

Filename

1568750