臺灣博碩士論文加值系統

目前無線充電越來越盛行，越來越多的產品與技術相繼出現，除了傳輸的線圈外，前端的功率放大器，後端的AC/DC整流器也越來越重要。由於近代無線充電的能量需求量提高，因此其技術也需要很大的改善，其中AC/DC整流器扮演很重要的角色，當發射端(TX)經由無線方式將能量傳給接收端(RX)時，所傳輸的能量為交流電，接收端需要一AC/DC整流器來將交流訊號轉成直流訊號，因此當整流器的能量效率轉換比(PCE)越高，轉換的能量損失越少，能提供更多的能量給後續的電路。除此之外，目前傳統的full bridge rectifier由於使用diode，在工作電壓低的環境下，diode所吃的壓降比較大，就算利用Shockley diode在成本考量下也並不符合效益，為此我們提出了一個全CMOS的AC/DC converter，不儘能節省成本，又能兼顧能量效率轉換比。

Now wireless power transfer is much more popular. More and more products or techniques have appeared one after another. Expect the transmission coil, the power amplifier on the front end and the AC/DC converter on the backend is much more important. In modern times, the power demand of wireless power transfer is increased. Technique need to be improved. All of these, AC/DC converter act important part of the wireless power transfer. When the transmitting terminal(TX) transfer power to the receiving terminal(RX) by wireless power transfer. The Trans missive power is in an ac current form. Receiving terminal needs the AC/DC converter to convert alternating current to dc current. When our power conversion efficiency(PCE) is high. The current loss by transferring is low. Our AC/DC converter can offer more power to our after end. Beyond that, the tradition full bridge rectifier use diode. At the low power, diode has high voltage drop. Even if we use Shockley diode, it is not cost-effective. So we propose a fully CMOS AC/DC converter. It is not only cost saving, but also maintains our power conversion efficiency.

目錄
指導教授推薦書
口試委員會審定書
誌謝 iii
中文摘要 iv
Abstract v
目錄 vi
圖目錄 viii
第一章 序論 1
第二章 整流器原理 4
2-1 整流器電路原理 7
2-2 比較器 12
2-3 整流器模擬結果 14
第三章 倍壓器/整流器 21
3-1 倍壓器 22
3-2 開關 25
3-3 開關的切換條變 29
第四章 post simulation 39
第五章 結論 46
參考文獻 47

圖目錄
圖1-1 一般無線充電架構圖[1] 2
圖1-2 system diagram圖 3
圖2-2 傳統橋式整流器 5
圖2-3 Synchronous整流器[14] 6
圖2-5 整流器電路圖 8
圖2-6 S0: Vin<Vgs圖 9
圖2-7 S1: Vgs<Vin<Vout圖 9
圖2-8 S2: Vin>Vout圖 10
圖2-9 S3: Vout>Vin>Vgs圖 10
圖2-10 S4: Vgs>Vin圖 11
圖2-11訊號運作示意圖 11
圖2-12 Dynamic Latched Comparator圖[15] 13
圖2-13 common gate comparator圖 13
圖2-14 輸入訊號Vac=2Vpp 15
圖2-15 輸出電壓Vout=1.88V 15
圖2-16 W/O dynamic body bias 16
圖2-17 multi-stage rectifier Vin Vs Vout圖 16
圖2-18 Rlaod=500Ω~1kΩ時的PCE變化 17
圖2-19 Multi-stage rectifier 17
圖2-20 2-Stage整流器 18
圖2-21 3-Stage整流器 18
圖2-22 當Cp=5nF~50nF時之Vout 18
圖2-23 考慮bondwire後的multi-stage rectifier 19
圖2-24 加入Ind後的2-stage rectifier PCE模擬結果 19
圖2-25 加入Ind後的3-stage rectifier PCE模擬結果 20
圖2-26 加入Ind後的3-stage rectifier Vout 模擬結果 20
圖3-1 voltage doubler圖 22
圖3-2 unbalance-bias compartor圖[8] 24
圖3-3 unbalance-biased compartor simulated waveforms圖[8](a)Vin=1.2V(b) Vin=2.4V 24
圖3-4 直接切換法示意圖[7] 26
圖3-5 mode切換瞬間[7] 26
圖3-6 間接切換法示意圖[4] 27
圖3-7利用PWM須加額外的logic control與ramp generator圖[4] 27
圖3-7 vd/rec switch圖 28
圖3-8 transmission gate圖 29
圖3-9 加上R1/R2所產生的波型變化圖 31
圖3-10加上R1/R2後續inverter所濾波的圖 31
圖3-11 rec/vd AC to DC converter圖 32
圖3-12 Duty Cycle=100%圖 33
圖3-13 Duty Cycle=35%圖 34
圖3-14 Duty Cycle=0%圖 35
圖3-15 rec/vd AC to DC converter Vin Vs Vout圖 36
圖3-16直接切換法Vin Vs Vout圖 37
圖4-1 layout圖 39
圖4-3 Vin=4.5Vpp圖 40
圖4-4 post simulation Vin Vs Vout圖 41
圖4-5 Vin=4.5Vpp pre simulation 圖 43
圖4-6 Vin=4.5Vpp post simulation 圖 43
圖4-7 Vin=4.5Vpp pre simulation 圖 44
圖4-8 Vin=4.2Vpp duty cycle不斷變化圖 44

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[15] https://en.wikipedia.org/wiki/Comparator
[16] https://en.wikipedia.org/wiki/Transmission_gate