具固定IF頻寬的CMOS雙頻道可調式增益升頻器

Abstract

本篇論文主要是研究在射頻積體電路中，利用本篇論文提出的新型修正電壓-電流轉換級，將中頻的可調式增益放大器與升頻器作一結合，透過電流模式的操作在同一級電路中同時實現可調式增益控制機制與頻率轉換機制。 我們使用TSMC 0.18μm CMOS與TSMC 0.35μm SiGe BiCMOS製程來實作應用於無線區域網路(WLAN)通訊系統與超寬頻(UWB)通訊系統具固定IF頻寬的可調式增益升頻器，其中為了在單晶片進行多個頻道訊號處理，同時也實現了應用於IEEE 802.11a/b/g WLAN通訊系統具固定IF頻寬的CMOS (2.4/5.7GHz)雙頻道可調式增益升頻器。

In this thesis, we focus on Radio Frequency Integrated Circuits. We combine IF variable gain amplifier with up-converter by using a new modified V-to-I transconductor stage, therefore, both frequency up-conversion and variable-gain amplification are achieved by using current-mode operation in a single chip. We implement several variable gain up-converter with constant IF bandwidth for WLAN and UWB communication systems by using TSMC 0.18μm CMOS technology and TSMC 0.35μm SiGe BiCMOS technology. Moreover, in order to do multi-band multi-mode signal processing by a single chip, we also implement a CMOS dual-band (2.4/5.7GHz) variable gain up-converter with constant IF bandwidth for IEEE 802.11a/b/g applications.