An Image-Reject Low-Noise Amplifier with Passive Q-Enhanced Notch Filters

Author

Anand, Pranavi ; Belostotski, Leonid ; Townsend, Kenneth ; Randall, Robert G. ; Haslett, James W.

Author_Institution

Univ. of Calgary, Calgary

fYear

2007

fDate

22-26 April 2007

Firstpage

368

Lastpage

371

Abstract

An image-reject low-noise amplifier with passive Q-enhanced notch filters in 0.18 mum CMOS is presented. Available IR-LNA designs employ a single notch filter to reject the precise image frequency and therefore require an additional automatic tuning circuit. This design achieves image-rejection over a bandwidth by using two series-connected passive notch filters, thereby relaxing the requirement of any additional tuning circuit. The proposed image-reject low noise amplifier has 16 dB gain at the signal frequency of 2.4 GHz and 58 dB rejection over a bandwidth of 100 MHz centered at the image frequency of 1.6 GHz. Noise Figure of 2.25 dB and P1dB of -13 dBm are obtained with bias current of 3.9 mA drawn from a 1.5 V power supply.

Keywords

CMOS integrated circuits; integrated circuit design; low noise amplifiers; notch filters; passive filters; tuning; CMOS; IR-LNA design; current 3.9 mA; frequency 1.6 GHz; frequency 2.4 GHz; image frequency rejection; image-reject low-noise amplifier; passive Q-enhanced notch filters; size 0.18 mum; tuning circuit; voltage 1.5 V; Band pass filters; Bandwidth; Circuit noise; Circuit optimization; Frequency; Gain; Low-noise amplifiers; Noise figure; Passive filters; Power supplies;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 2007. CCECE 2007. Canadian Conference on

Conference_Location

Vancouver, BC

ISSN

0840-7789

Print_ISBN

1-4244-1020-7

Electronic_ISBN

0840-7789

Type

conf

DOI

10.1109/CCECE.2007.98

Filename

4232757