DESIGN AND IMPLEMENTATION OF A 1.9-22.5 GHz CMOS WIDEBAND LNA WITH DUAL-RLC-BRANCH WIDEBAND INPUT AND OUTPUT MATCHING NETWORKS

被引：0

作者：

Lin, Yo-Sheng ^{[1
]}

Wang, Chien-Chin ^{[1
]}

Lee, Jen-How ^{[1
]}

机构：

[1] Natl Chi Nan Univ, Dept Elect Engn, Puli 545, Taiwan

来源：

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2014年 / 56卷 / 03期

关键词：

LOW-NOISE AMPLIFIER; GAIN;

D O I：

10.1002/mop.28186

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 1.9-22.5 GHz wideband low-noise amplifier (LNA) based on the current-reused cascade configuration in 90 nm CMOS is reported. The wideband input-impedance matching was achieved by taking advantage of the resistive shunt-shunt feedback in conjunction with a parallel LC load to make the input network equivalent to two parallel resistor-inductor-capacitor (RLC) branches, that is, a second-order wideband band-pass filter (BPF). The wideband output-impedance matching was also achieved by making the output network equivalent to a second-order wideband BPF. Theoretical analysis shows that both the frequency response of input matching and noise figure (NF) can be described by second-order functions with quality factors as parameters. The LNA (LNA-1) dissipates 9.96 mW and achieves low and flat NF of 3.24 ± 0.5 dB and high and flat S21 of 12.02 ± 1.5 dB for frequencies 1.9-22.5 GHz. The corresponding figure of merit (FOM) is 7.44 GHz/mW, one of the highest FOMs ever reported for a wideband LNA with bandwidth around 20 GHz. To study the effect of self-forward body bias (SFBB) on LNA-1, an LNA-2 consisting of LNA-1 and SFBB is implemented for comparison. The results show LNA-2 consumes less power at the expense of a worse NF due to the body noise. © 2014 Wiley Periodicals, Inc.

引用

页码：677 / 684

页数：8

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