[Paper]CMOS Low-Noise Amplifier Design Optimization Techniques

gmc832002

Abstract—This paper reviews and analyzes four reported low-noise amplifier (LNA) design techniques applied to the cascode topology based on CMOS technology: classical noise matching, simultaneous noise and input matching (SNIM), power-constrained noise optimization, and power-constrained simultaneous noise and input matching (PCSNIM) techniques. Very simple and insightful sets of noise parameter expressions are newly introduced for the SNIM and PCSNIM techniques. Based on the noise parameter equations, this paper provides clear understanding of the design principles, fundamental limitations, and advantages of the four reported LNA design techniques so that the designers can get the overall LNA design perspective. As a demonstration for the proposed design principle of the PCSNIM technique, a very low-power folded-cascode LNA is implemented based on 0.25- m CMOS technology for 900-MHz Zigbee applications. Measurement results show the noise figure of 1.35 dB, power gain of 12 dB, and input third-order intermodulation product of 4 dBm while dissipating 1.6 mA from a 1.25-V supply (0.7 mA for the input NMOS transistor only). The overall behavior of the implemented LNA shows good agreement with theoretical predictions.

Index Terms—CMOS, low-noise amplifier (LNA), low power, low voltage, noise optimization, RF, Zigbee.

abab1394

谢谢。。。

iyahsue

Frequency Compensation Techniques For Low-Power Operational Amplifiers

tiandihu

谢谢你！

honkinlg

谢谢楼主哦

ryanbowen40

谢谢楼主哦

一意孤行

不错，谢谢啦

ahhuh

谢谢分享，nice article.

jianchongzhou

是好文章,可惜已经有了