a ku-band interference-rejection cmos low-noise amplifier using current-reused stacked common-gate...
TRANSCRIPT
A Ku-Band Interference-Rejection CMOSLow-Noise Amplifier Using Current-Reused
Stacked Common-Gate Topology
Adviser : Zhi-Ming Lin
Postgraduate : Chia-Wei Chang
Wen-Lin Chen, Sheng-Fuh Chang, Guo-Wei Huang, Yuh-Sheng Jean and Ta-Hsun Yeh
Microwave and Wireless Components Letters, IEEE Volume 17, Issue 10, Oct. 2007 p.p718 - 720
Outline
Introduction
Circuit Design
Measurement Results
Conclusion
Introduction
With the rapid growth of wireless and mobile communications, wireless radios require effective interference and image rejection.
To rejection the image interference of wireless radio, the LNA with its followed interference-rejection (IR) BPF will be used.
Circuit Design
Fig1.Schematic diagram of the proposed IR LNA
Two common-gate stages are stacked together as a current-reused stacked common-gate topology
Fig2.small-signal model
Measurement Resultspower gain is
10.8 dB at 15GHz
NF is 2.6 dB at 15GHz
The measured power gain is 10.8 dB at 15GHz
The IR is 38.5dB due to a transmission zero is generated at
24GHz
Microphotograph of the LNA.
TABLE
COMPARISON OF CMOS LNAS OF THIS WORK AND REPORTED WORKS IN LITERATURE
A UWB CMOS LNA has been implemented in a 0.13 -μm CMOS process.
Power gain of 10.8 dB
23.3-dB gain control range at 15 GHz
38.5-dB rejection on interference at 24 GHz
A current-reused stacked common-gate LNA is proposed for high IR, wide gain control range, and low dc power consumption at Ku-band.
Conclusion
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[2] M. H. Koroglu and P. E. Allen, “A 1.9 GHz image-reject front- end with automatic tuning
in a 0.15 um CMOS technology,” in IEEE Int. Solid-State Circuits Conf. Tech. Dig., San
Francisco, CA, Feb. 2003, pp. 264 – 265.
[3] H. Samavati, H. R. Rategh, and T. H. Lee, “A 5 GHz CMOS wireless LAN receiver front end,” IEEE J. Solid-State Circuits, vol. 35, no. 5, pp. 765–772, May 2000.
[4] J. W. M. Rogers and C. Plett, “A 5 GHz radio front-end with automatically Q-tuned notch
filter and VCO,” IEEE J. Solid-State Circuits, vol. 38, no. 9, pp. 1547–1554, Sep. 2003.
[5] Razavi, “A 60-GHz CMOS receiver front-end,” IEEE J. Solid-State Circuits, vol. 41, no. 1,
pp. 17–22, Jan. 2006.
Thank You For Your Attention