Title page for etd-0808111-162539


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URN etd-0808111-162539
Author Yain-Reu Lin
Author's Email Address No Public.
Statistics This thesis had been viewed 5350 times. Download 508 times.
Department Electrical Engineering
Year 2010
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Low Power Half-Run RC5 Cipher Circuit for Portable Biomedical Device and A Frequency-Shift Readout Circuit for FPW-Based Biosensors
Date of Defense 2011-07-28
Page Count 77
Keyword
  • frequency-shift readout system
  • RC5
  • flexural plate wave
  • biomedical system
  • low power
  • ZigBee
  • Abstract This thesis consists of two topics. We proposed a low power half-run RC5 cipher for portable biomedical devices in the first part of this thesis. The second topic is to realize a frequency-shift readout system for FPW-based biosensors.
      In the first topic, a half-round low-power RC5 encryption structure is proposed. To reduce hardware cost as well as power consumption, the proposed RC5 cipher adopts a resource-sharing approach, where only one adder/subtractor, one bi-directional barrel shifter, and one XOR with 32-bit bus width are used to carry out the entire design. Two data paths are switched through the combination of four multiplexers in the encryption/decryption procedure. For the sake of power reduction, the clock in the key expansion can be turned off when all subkeys are generated.
      In the second topic, an IgE antigen concentration measurement system using a frequency-shift readout method for a two-port FPW (flexural plate-wave) allergy biosensor is presented. The proposed frequency-shift readout method adopts a peak detecting scheme to detect the resonant frequency. A linear frequency generator, a pair of peak detectors, two registers, and an subtractor are only needed in our system. According to the characteristics of the FPW allergy biosensor, the frequency sweep range is limited in a range of 2 MHz to 4 MHz. The precision of the measured frequency is proved to the 4.2 kHz/mV, which is for better than that of existing designs.
    Advisory Committee
  • Sying-Jyan Wang - chair
  • Soon-Jyh Chang - co-chair
  • Shen-Fu Hsiao - co-chair
  • Chua-Chin Wang - advisor
  • Files
  • etd-0808111-162539.pdf
  • Indicate in-campus at 3 year and off-campus access at 5 year.
    Date of Submission 2011-08-08

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