標題: 一個使用低功率相位鍵移解調變器同時傳功率與資料
A Low-Power Binary Phase Shift Keying Demodulator for Power and Data Telemetry Systems in Biomedical Implants
作者: 王俐嵐
闕河鳴
電信工程研究所
關鍵字: 相位鍵移調變;解調變電路;資料遙測系統;BPSK;demodulator;data telemetry
公開日期: 2012
摘要: 本論文成功地實現一個同時傳輸功率和資料之遙測系統,並針對相位鍵移解調變的部分有特別的改善。以往的相位鍵移解調變電路都是使用鎖相迴路來重現基頻資料,但由於鎖相迴路之功率消耗過大,本論文將以數位電路實現相位鍵移解調變器。首先線圈接受到的載波訊號會經過比較器等電路做數位化的處理,再由後續數位電路偵測訊號之正緣或負緣來做資料的解調。相比以往的解調變電路,此電路的功率消耗很低,適用於植入性的系統。理論上,此解調方式並可支持百分之百的資料率對載波頻率之比例。我們使用台積電0.18微米製程實現一個操作在13.56兆赫茲的相位鍵移解調變電路,此解調電路之功率消耗為191毫瓦。我們考慮到線圈、整流器與解調變器之關係,且選擇適當品質因數的線圈,成功實現一個同時傳輸資料與功率的遙測系統。線圈之品質因數因線圈尺寸的限制而有一定的最佳值,在此最佳之線圈下我們傳輸的資料率可達到每秒傳678千位元之資料率。並且位元錯誤率可達到十的負九次方。
This paper presents a fully digital binary-phase-shift keying (BPSK) demodulator for data and power telemetry. This demodulator recovers BPSK signals by detecting the symbol edge of the digitized received carrier. Parameters of the coupling coils, rectifier DC output, and data rate are taken into consideration in the early design stage. The demodulator achieves a data rate of 13.56Mb/s at a carrier frequency of 13.56MHz, achieving 100% data rate to carrier frequency ratio. Given a limited coil size and quality factor, the maximum data rate of this system achieves 678kb/s with BER < 10-9. Fabricated in a 0.18μm CMOS process, the chip area is 0.445mm2. The chip core dissipates 191μW at 13.56MHz. A system prototype was developed to transmit data and power simultaneously through a pair of coils.
URI: http://140.113.39.130/cdrfb3/record/nctu/#GT079813626
http://hdl.handle.net/11536/47105
顯示於類別:畢業論文


文件中的檔案:

  1. 362601.pdf