Design Report on RF Front-End Receiver__VCO and Synthesizer-Divider

kevinwjs

This study was done within the scope of the European project PAPRICA and its purpose
is to demonstrate a new architecture for the channels of radio reception that permits high
levels of integration.
This report also serves as a practical guide for those who wish to design LNAs and
Mixers, putting less relevance on the theoretical basis. For a more in-depth knowledge in this
area, the publications referenced during this text are recommended.
Prototypes of two of the blocks that make up the RF Front-End, namely a low-noise
amplifier (LNA) and a Mixer block for use in DECT Standard wireless telephone equipment,
were realized, in integrated circuit, using 0,35μm CMOS technology from ATMEL ES2. Two
LNAs are presented, both having as a base a totally differential structure. The difference
between them lies in the way that the matching of the input impedances is done. The first
matching is done internally, resorting to only two external inductors for elimination of the
impedances’ reactive component. This is possible due the use of made-to-fit pads and without
protection against electrostatic discharges. In the second, we opted to use the technology’s
standard pads, which, due to their great parasitic capacity, made it impossible to internally
match the impedances making it necessary to resort to an external network.
The final result of the study is the database necessary for the implementation of the
integrated circuits in silicon. Only the simulation results of the circuits extracted from the
layout, and the respective conclusions, are presented as, at the date of conclusion of this
report, the integrated circuits had still not been made available by the manufacturer.
The version of the LNA with better performance was the one that needed the external
network for matching of the impedance. For a voltage supply of 2,6 V this LNA presents a
voltage gain of 21 dB, a noise factor of 1,73 dB, a IIP3 of 5 dBm and 50  of input
impedance. Under the same conditions, the LNA without a network of external matching
presented a voltage gain of 18 dB, a noise factor of 2,1 dB, an IIP3 of 4,5 dBm and 52  of
input impedance. Both the LNAs present a current consumption of 11 mA.
The Mixer used is based on the Gilbert cell and carries out a movement in frequency of
1,9 GHz (RF) to an intermediate frequency of 150 MHz (FI). In this study, two identical
Mixers were used, one in phase (I) and the other in quadrature (Q), this way allowing image
rejection.
The results obtained for this block revealed a conversion gain of 2 V/V and a point of
third-order intersection of 12 dBm. The Mixer block’s structure, which contains two Mixers
and other blocks necessary for its functioning, have a consumption of 17,3 mA to 3 V of
power supply.

kevinwjs

Forget the attached file,sorry.

fanjx

看看看看

fanjx

超棒文章超棒啊

donnie

看看吧

yantom

RFIC LNA MIX PLL design

hainihao

各种好东西！

tlu3

感謝您的分享阿!!

zengql2007

为什么我下载下来就打不开呢？郁闷

lixian1984

thank you very much