A Wideband Differential Low-Noise-Amplifier With IM3 Harmonics and Noise Canceling

Author

Hankyu Lee ; Taeyoung Chung ; Heesong Seo ; Inyoung Choi ; Bumman Kim

Author_Institution

Dept. of Electr. Eng., Pohang Univ. of Sci. & Technol. (POSTECH), Pohang, South Korea

Volume

25

Issue

1

fYear

2015

fDate

Jan. 2015

Firstpage

46

Lastpage

48

Abstract

This letter presents a wideband 2-stage differential LNA which utilizes the canceling techniques of IM3 harmonic distortion and noise. The 1st stage adopts a gm-boosted cross-coupled push-pull amplifier to achieve an input matching and reduce the NF. The 2nd stage simultaneously cancels the IM3 and thermal noise of the transistors in the 1st stage. The LNA has a gain of 16~18 dB in a wide bandwidth of 0.1~2.5 GHz, while consuming 13 mW from a 1.2 V power supply. The NF is 1.7~2.7 dB and IIP3/IIP2 are -3 ~ 0/18~21.5 dBm, respectively. The LNA is fabricated in 65 nm digital CMOS technology and the chip area is 0.008 mm².

Keywords

CMOS digital integrated circuits; differential amplifiers; harmonic distortion; interference suppression; low noise amplifiers; thermal noise; wideband amplifiers; IM3 harmonic distortion; IM3 harmonics noise; NF reduction; digital CMOS technology; gm-boosted cross-coupled push-pull amplifier; noise canceling techniques; power 13 mW; power supply; size 65 nm; thermal noise; transistors; voltage 1.2 V; wideband 2-stage differential LNA; wideband differential low-noise-amplifier; CMOS integrated circuits; Gain; Harmonic analysis; Harmonic distortion; Noise; Noise measurement; Wideband; ${rm gm}$-boosted; IM3 cancellation; noise cancellation; wideband low-noise-amplifier (LNA);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2014.2365733

Filename

6945912