Wideband Amplifier and Automatic Gain Control Amplifier
Date Issued
2004
Date
2004
Author(s)
Chen, Wei-Sheng
DOI
en-US
Abstract
The goal of this work is to use a standard CMOS process to construct a wideband amplifier with low power consumption. And two applications of this wideband amplifier are presented. This thesis covers three major topics. First, the fundamental theories of wireless/optical communication systems are introduced. Then a wideband amplifier structure is proposed. Finally, a UWB amplifier and a AGC amplifier built by the proposed wideband amplifier are discussed.
Some important fundamental theories of wireless/optical receiver front-end are reviewed. Some essential circuit parameters are also introduced.
Then, we would show the design of a 7.5 GHz wideband amplifier and its bandwidth improving technique. Then this amplifier is used to construct a UWB front-end wideband amplifier of 20dB gain tuning range, 1.8 – 8.8 GHz measured bandwidth, and 40mW power consumption.
At last, the principles and architectures of the automatic gain control are discussed. With discussing the typical structures and existing solutions of AGC circuits, an AGC is composed. Complete mathematical analysis both in time and frequency domains will be introduced. And a 6.5 Gb/s AGC loop has been implemented and experimental results are presented.
Subjects
放大器
自動增益調整
寬頻
wideband
amplifier
AGC
Type
thesis
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