Using auxiliary amplifier to cancel third-order intermodulation distortion for a 1.9 GHz CMOS linear amplifier design

被引：0

作者：

Liang, KH ^{[1
]}

Ho, CC ^{[1
]}

Hsieh, MW ^{[1
]}

Chan, Y ^{[1
]}

机构：

[1] Natl Cent Univ, Dept Elect Engn, Chungli 32054, Taiwan

来源：

2005 IEEE RADIO FREQUENCY INTEGRATED CIRCUITS (RFIC) SYMPOSIUM, DIGEST OF PAPERS | 2005年

关键词：

CMOS; IIP3; harmonic; intermodulation; nonlinear;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A new linearization method of microwave amplifier design by canceling the third-order intermodulation component (2f(2)-f(1)) is proposed. The main amplifier is combined with an auxiliary amplifier, which is appropriately designed by the gain and bias conditions. The output frequency spectra of the main amplifier are subtracted by this auxiliary amplifier. The third-order distortion will be canceled since these two amplifiers are designed by a differential-pair stage. lIP(3) improvement as large as 11 dB has been obtained, where this amplifier achieves a 11.5 dB gain at 1.9 GHz, fabricated by using 0.18 mu m CMOS technologies. The circuit consumed 11.5 mA or 11 mA based on the condition of auxiliary amplifier on or off, respectively. The auxiliary amplifier consumes small than 0.8 mW dc power and causes only 0.2 dB gain reduction of the main amplifier.

引用

页码：237 / 240

页数：4

共 6 条

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[4] [No title captured]
[5] [No title captured]
[6] [No title captured]

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