A Highly Linear Wideband CMOS Low-Noise Amplifier Based on Current Amplification for Digital TV Tuner Applications

Author

Song, Seong-Sik ; Im, Dong-Gu ; Kim, Hong-Teuk ; Lee, Kwyro

Author_Institution

Korea Adv. Inst. of Sci. & Technol., Daejeon

Volume

18

Issue

2

fYear

2008

Firstpage

118

Lastpage

120

Abstract

A differential wideband low-noise amplifier (LNA) based on the current amplification scheme is presented for digital TV tuners. In order to highly improve the linearity and exploit the noise cancellation, a common-gate stage with positive current feedback is integrated in parallel with a common-source stage using the current mirror amplifier. The proposed 0.18-mum CMOS LNA exhibits a power gain of 20.5 dB, an IIP3 of 2.7 dBm, an IIP2 of 43 dBm, and an average noise figure of 3.3 dB with 32.4 mW power consumption at a 1.8-V power supply and 0.12 mm² area.

Keywords

CMOS integrated circuits; differential amplifiers; digital television; feedback; low noise amplifiers; tuning; wideband amplifiers; common-gate stage; current mirror amplification; digital TV tuner; linear differential wideband CMOS low-noise amplifier; noise cancellation; noise figure 3.3 dB; positive current feedback; power 32.4 mW; power consumption; size 0.18 mum; voltage 1.8 V; Common-gate (CG) amplifier; current amplification; digital television (TV); low-noise amplifier (LNA); noise-canceling; positive current feedback; wideband;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2007.915101

Filename

4441366