Transcript Wideband LNA for a Multistandard Wireless Receiver in 0.18μm

Wideband LNA for a
Multistandard Wireless Receiver
in 0.18μm CMOS
指導教授:林志明
學生:黃世一
[email protected]
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Outline
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Abstract
Introduction
Design of the LNA input stage
Design of the LNA output stage
Measure Performance and Discussion
Conclusion
References
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Abstract
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A differential wideband LNA for a
multistandard receiver
The circuit topology is a two-stage
amplifier with active feedback
Bandwidth enhancement with inductive
shunt-peaking
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Introduction 1
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The increasing number of wireless
standards and multistandard
transceivers increase.
WCDMA , WLAN (802.11a,b,g,…),
HIPERLAN etc.
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Introduction 2
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The RF frontend for all these standards
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One RF frontend for each standard
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A wideband RF frontend
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A narrowband LNA with multiple
passbands
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Tunable LNAs
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Design of the LNA input stage
Inductive shunt-peaking
Control the
input
impedance
Optimizing the
frequency
behavior
Current source
Reducing the Miller effect
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The gain of the input stage is
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The input impedance is
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Noise figure
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A theoretical expression for the noise
figure of a single-ended version of our
amplifier is
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Design of the LNA output
stage
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Measure Performance and
Discussion
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S21
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S11 and S22
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NF
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IIP3
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1-dB compression point
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Conclusion
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A wideband LNA
The chosen circuit topology
Measured and simulated results
A gain of 13.1 dB with an almost 7 GHz
3-dB bandwidth
Noise figure is low
Input / out reflection coefficient
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References
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S. Andersson, C. Svenson, O. Drugge, Wideband LNA
for a Multistandard Wireless Receiver in 0.18μm
CMOS, Solid-State Circuits Conference, 2003.
ESSCIRC '03. Proceedings of the 29th European 1618 Sept. 2003 Page(s):655 - 658
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Thank You For Your Attention
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