A Low-Power Complex Active-RC Filter for Low-IF Receivers Using a New Class-AB Operational Amplifier

Author

Abrishamifar, A. ; Zanbaghi, R. ; Mehrmanesh, S. ; Lahiji, G.R.

Author_Institution

Iran Univ. of Sci. & Technol., Tehran

fYear

2007

fDate

26-28 Sept. 2007

Firstpage

309

Lastpage

312

Abstract

The design of a complex active-RC filter for low-IF wireless applications is described. Fifth-order complex Butterworth filter is designed using class-AB operational amplifier architecture. This new structure makes the filter suitable for low power applications with high dynamic range. Simulation results show that the filter provides more than 40 dB image rejection ratio (IIR) and dynamic range of 82 dB. The complete filter including on-chip tuning circuit consumes only 4.3 mW with 1.8 V single supply voltage.

Keywords

Butterworth filters; active filters; low-power electronics; operational amplifiers; receivers; tuning; Butterworth filters; active-RC filter; class-AB operational amplifier; low-IF receivers; on-chip tuning circuit; power 4.3 mW; voltage 1.8 V; Attenuation; Circuit simulation; Circuit topology; Dynamic range; Frequency; IIR filters; Operational amplifiers; Passive filters; Power filters; Tuning; CMOS; Iow-IF; active-RC; complex filter; image rejection; op-amp;

fLanguage

English

Publisher

ieee

Conference_Titel

Integrated Circuits, 2007. ISIC '07. International Symposium on

Conference_Location

Singapore

Print_ISBN

978-1-4244-0797-2

Electronic_ISBN

978-1-4244-0797-2

Type

conf

DOI

10.1109/ISICIR.2007.4441860

Filename

4441860