Title page for etd-0215117-132236


[Back to Results | New Search]

URN etd-0215117-132236
Author Yu-Ting Tu
Author's Email Address rocitydau@gmail.com
Statistics This thesis had been viewed 5559 times. Download 1313 times.
Department Electrical Engineering
Year 2016
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title A Phase Detector with Offset Voltage Calibration for Biosensors
Date of Defense 2017-02-22
Page Count 91
Keyword
  • offset calibration
  • current feedback instrumentation amplifier
  • phase shift detector
  • Abstract Biological signal measurement becomes very important as the technology rapidly advances. Consequently, it drives the development of biosensors and biosensing technologies. Particularily, the phase of the bio-signals is a significant information to tell the bio-features. Therefore, it is important to enhance the precision of the phase shift detector to ensure the credibility.
    The first research topic of this thesis is a phase shift detector with offset voltage calibration. To eliminate the offset caused by mismatch of MOSFET differential pair in the input stage of the comparator, we propose an offset calibration design. By regulating the bulk voltage of the selected MOSFET in the comparator, the offset voltage is significantly reduced. The calibrated offset voltage is 5.35 mV in the worst case by all-PVT-corner simulations. The ouptut error of the proposed phase shift detector is between -0.68% and 2.37%.
    The second topic is a current-feedback intrumentation amplifier used in the phase shift detector. It means to replace the comparator and the offset calibration in the previous topic. By taking advantage of a chopper to lower the offset voltage of the entire amplifier, and a ripple reduction loop to clamp the ripple at the output, it can reduce the offset voltage down to 10 V. The gain error is 2.7 %. In addition, the amplitude of the ripple is 4.7 mV.
    Advisory Committee
  • Ya-Hsin, Hsueh - chair
  • Tzu-Chao, Chuang - co-chair
  • Ko-Chi, Kuo - co-chair
  • Chua-Chin, Wang - advisor
  • Files
  • etd-0215117-132236.pdf
  • Indicate in-campus at 2 year and off-campus access at 2 year.
    Date of Submission 2017-03-15

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have more questions or technical problems, please contact eThesys