研究生: |
傅士豪 Fu, Shih-Hao |
---|---|
論文名稱: |
LDMOSFET特性分析及其模型的建立 Analysis and Model Establishment of N-type Lateral Diffused Metal Oxide Semiconductor Field Effect Transistor (LDMOSFET) |
指導教授: |
龔正
Gong, Jeng 黃智方 Huang, Chin-Fang |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
電機資訊學院 - 電子工程研究所 Institute of Electronics Engineering |
論文出版年: | 2009 |
畢業學年度: | 98 |
語文別: | 中文 |
論文頁數: | 127 |
中文關鍵詞: | LDMOS 、fT 、fmax 、小訊號等校電路模型 、switch circuit 、insertion loss |
相關次數: | 點閱:3 下載:0 |
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本論文利用0.25-um BCD製程設計適合做高壓以及高頻應用的LDMOSFET,在直流特性部份,元件的臨界電壓為2.3V;在崩潰電壓方面可以達到25V。在高頻特性部份,高頻參數電流增益截止頻率(fT)為9.11GHz、最大振盪頻率(fmax)為7.16GHz。
建立LDMOSFET的小訊號等效電路模型對於分析元件特性包含增益、隔離度、插入損耗等有很大的幫助,本論文的LDMOSFET小訊號等效電路模型的參數萃取方法是利用Z-參數萃取外質部分,利用Y-參數萃取本質部份。在廣泛偏壓範圍及寬度的模擬結果都可以與量測結果契合。
利用萃取的小訊號參數可以建立收發切換開關(SPDT RF T/R Switch)的等效電路模型,收發切換開關具有低插入損耗、好的隔離度、低電壓與低消耗功率特性。
本論文設計的LDMOSFET所建立的小訊號模型與收發切換開關的特性,如增益、插入損耗、隔離度、P1dB以及IP3等表現都適合於頻為900-MHz的應用。
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