應用於RFID之FSK解調系統與電流回授低壓降電壓調整器研製

Design and Implementation of FSK Demodulation System Application for RFID and Current Feedback Low-Dropout Voltage Regulator

黃世源(Shi-Yuan Huang)

指導教授 ： 陳建中

國立臺北科技大學/電資學院/電腦與通訊研究所/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00604

摘要

本論文分為兩部份，第一部份為應用於無線射頻辨識系統之移頻調變解調系統，解調系統由交流直流轉換器與解調電路組成。利用整流器與穩壓器組成交流直流轉換器，可以得到一個低漣波電壓的工作電源，提供給解調電路使用。解調電路分有類比式與數位式兩種架構，在類比式解調電路中，我們用多工器、相位頻率檢測器、電荷幫浦與電流控制振盪器來構成。至於數位式解調電路，我們使用多工器、移位暫存器、相位頻率檢測器與電荷幫浦組成。類比式解調系統與數位式解調系統都以台積電0.35μm 2P4M CMOS製程實現，類比式解調系統晶片面積為0.34mm2(不含PAD)，數位式解調系統為0.36mm2(不含PAD)。
第二部份是針對電源系統所中需要的低壓降線性穩壓器提出設計與實現。線性穩壓器穩壓方式是根據輸出電壓與參考電壓之間的電壓差，此差值經由誤差放大器放大後，用來控制功率電晶體的閘極電壓，進而調節負載電流的大小，使輸出電壓受到控制。最後，在輸出端掛上分壓電阻，將輸出電壓分壓後再與電壓調整器的負端相連，使整個系統形成穩定的負回授系統，因此我們可以預先規定輸出電壓大小，在藉由控制機制調整輸出電壓。本電路使用的是台積電0.35μm 2P4M CMOS製程實現，晶片面積為0.25mm2(不含PAD)。

關鍵字

無線射頻辨識系統 ； 移頻調變 ； 低壓降線性穩壓器

並列摘要

The major research of this thesis can be divided into two parts. The first part of the thesis is to implement a FSK demodulation system for RFID. We proposed an analog demodulation system and a digital demodulation system. The both systems use the same AC-DC converter which provides DC power for demodulation circuit. The analog demodulation circuit is composed of a multiplexer, a phase frequency detector, a charge pump, and a current controlled oscillator. The digital demodulation circuit is composed of a multiplexer, a phase frequency detector, a charge pump, and a shift register. The two demodulation systems are implemented by 3.3V TSMC 0.35μm CMOS 2P4M process. The chip area of analog demodulation system is 0.34mm2 without PAD, and the chip area of digital demodulation system is 0.36mm2 without PAD.
In the second part of this thesis, we presented a current feedback low-dropout voltage regulator. We adopted a simple circuit architecture and replaced voltage feedback by current feedback. Therefore, the characteristics of the proposed LDO are low quiescent current and fast transient response. The LDO is implemented by 3.3V TSMC 0.35μm CMOS 2P4M process. The chip area of LDO is 0.25mm2 without PAD.

並列關鍵字

RFID ； FSK ； LDO

參考文獻

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[3] Bob Watson, “FSK：Signals and Demodulation,” Tech-note, Watkins Johnson Company, 1980.

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