A low-voltage active-RC filter for wideband communication transceivers

Author

Lim, Jinup ; Cha, Sanghyun ; Yang, Huikwan ; Lee, Seungym ; Lee, Sangheon ; Choi, Joongho

Author_Institution

Univ. of Seoul, Seoul

fYear

2007

fDate

17-19 Oct. 2007

Firstpage

260

Lastpage

263

Abstract

A low -voltage wide-band active-RC filter for wireless communication transceivers is presented. It is the 5th-order Chebyshev-II low pass filter with the bandwidth of 20 MHz. To guarantee high linear characteristic at a low supply voltage, the input common-mode level shifting circuit is added at the inputstage of the operational amplifier so that the input common-mode levelof the amplifier can be set close to one of the supply rails. The measured result of the IIP3 (3rd-order input intercept point) is about 24 dBm. A fast and accurate frequency tuning circuit is included to compensate RC variation. The filter is fabricated in a 0.25-mum CMOS standard process and dissipates 30 mW for a supply voltage of 12 V.

Keywords

CMOS integrated circuits; Chebyshev filters; RC circuits; active filters; low-pass filters; operational amplifiers; transceivers; 0.25-mum CMOS standard process; 3rd-order input intercept point; Chebyshev-II low pass filter; IIP3; bandwidth 20 MHz; common-mode level shifting circuit; frequency tuning circuit; low-voltage active-RC filter; operational amplifier; power 30 mW; size 0.25 mum; voltage 12 V; wideband communication transceiver; Band pass filters; Bandwidth; Chebyshev approximation; Circuits; Low pass filters; Operational amplifiers; Rail to rail amplifiers; Transceivers; Wideband; Wireless communication; CMOS Active-RC filter; low-voltage; wideband; wireless communication transceivers;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Information Technologies, 2007. ISCIT '07. International Symposium on

Conference_Location

Sydney,. NSW

Print_ISBN

978-1-4244-0976-1

Electronic_ISBN

978-1-4244-0977-8

Type

conf

DOI

10.1109/ISCIT.2007.4392026

Filename

4392026