CMOS LNA & mixer design

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【文件名】:07429@52RD_CMOS LNA & mixer design.pdf
【格　式】:pdf
【大　小】:2120K
【简　介】:This thesis deal with two parts of a radio receiver. The low noise amplifier (LNA) and the
mixer.
A tuned RF front-end amplifier in CMOS with an operating frequency around 1.8 to 2GHz
has been investigated. A symmetric design has been used to improve linearity with preserved
power consumption. In this case it has been a parallel connection of complementary
devices. The symmetric solution allows the use of inductor pairs in transformer configuration
to improve the gain of the circuit.
The input impedance has been controlled by an inductive series feedback of a transconductance.
An extended investigation has been made to determine the effect of the capacitive
shunt feedback, traditionally ignored, as well as the effects of other internal parasitics. Simulation
results shows that for a required input resistance and operating frequency a maximum
transconductance of the transistor can be found. A new approximation of the input
resistance where found, valid for low frequencies and for small transconductances.
The most important part of the amplifier is the first stage (the inverter) as it will affect both
input impedance and noise. Analysis of the optimum noise figure both with the capacitive
shunt feedback excluded and included are made to show that it is possible to repeat the calculations
in the same manner both times and thereby being able to compare the results.
The major conclusion of this paper is that the shunt feedback can not be ignored and that
good design methods therefore require a more extended analysis.
Imbalances in quadrature demodulators, based on a passive CMOS mixer with capacitive
load, has been studied with respect to process spread.
A mathematical model of the mixer has been presented which explains the statistical spread
in the mixer. The mixer transfer function has been divided into a multiplier, an amplifier
and a time-variant filter, where the statistical spread will affect the filtering part of the mixer.
The filter
【目　录】:

progrese

谢谢拉，最近在做CMOS LNA

d-boy

3Q[em01]

blueskyfly

[em10][em14][em12]

stevenzz100

坚持免费，顶

liuhero_008

支持啊[em06]

pengxx

谢谢!!!
[em08][em08][em08]

amber_kuo

谢谢大哥