Design and Implementation of a Zero-IF RF Front-End Circuit for Wireless LAN
Date Issued
2004
Date
2004
Author(s)
Chang, You-Wei
DOI
en-US
Abstract
In recent years, with the growth of semiconductor process and technology, the wireless communication replaces the wired system gradually. More and more solutions are developed toward low power and high integration.
The target of our laboratory research is to design an 802.11b WLAN transceiver by using zero-IF architecture. We divide the transceiver into several parts: Front-End Receiver, Channel Select Filter, Variable Gain Amplifier and Phase Lock Loop. This Thesis is focused on the design flow and implementation of a front-end receiver. The building blocks include a Low Noise Amplifier (LNA), two modified Gilbert cell mixers, and a divider with driving buffers. The Electro-Static-Discharge (ESD) protection circuit, package model, and transmission line effect have all been considered in the design process.
We use the TSMC CMOS 0.25μm process technology. We stress on the solution of zero-IF architecture for IEEE 802.11b. The whole circuit used on-chip inductors and achieved a small size and low power design.
The power supply is 2.7V. The simulation results of the proposed LNA are 25.4dB gain, 3.5dB noise figure, -18dBm IIP3, and -27dBm P1-dB at the high-gain mode. In the low-gain mode, the performances are 1.8dB gain, 13.8dB noise figure, 7.2dBm IIP3 and -5dBm P1-dB. The simulation results of the mixer are 6.4dB gain, 19.8dB noise figure, 2.8dBm IIP3 and -6.2dBm P1-dB. The divider with driving buffers provide -4dBm LO signal at 2.4GHz.
Subjects
混波器
低雜訊放大器
無線區域網路
Wireless LAN
Mixer
802.11b
LNA
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-93-R91943061-1.pdf
Size
23.31 KB
Format
Adobe PDF
Checksum
(MD5):99b2bcb08a658bd1171508c33c0e4e34