Title :
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
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;
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
DOI :
10.1109/ISICIR.2007.4441860
