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Low-voltage and low-power libraries for Medical SoCs

Balasubramanian, Sidharth
http://rave.ohiolink.edu/etdc/view?acc_num=osu1259776639

Abstract Details

2009, Master of Science, Ohio State University, Electrical and Computer Engineering.
The recent focus on Green Electronics and a rapid revolution of bio-chips has led to the need for designs operating with lower supply voltages and consuming lesser power than before. This thesis focuses on the design of a library of low-voltage and low-power circuit designs on TSMC 0.13 µm process. A survey of existing well-known architectures for bio-medical acquisition systems is done, and some modifications to the existing system is presented. A low-voltage rail-to-rail amplifier is designed with a novel voltage-mode technique to obtain constant transconductance over the entire common-mode input range. The power consumption of this amplifier is less than 3 µW. A universal figure-of-merit is established to rank a rail-to-rail input stage, taking into account the complexity in designing in sub-micron processes. This new figure-of-merit accounts for the variation in transconductance, the maximum common-mode range possible and the power consumption. A chopper amplifier with about 33 dB gain, capable of operating from 1 V to 1.8 V is presented. A sub-threshold MOS-only voltage reference operating from a 0.5 V supply with a temperature coefficient of 20.8 ppm/°C is designed. A Dickson charge pump with an output voltage of 5 V is designed for pacing applications. A 1 V successive-approximation ADC with 8-bits of resolution is designed. A 1 V rail-to-rail comparator with a 1 V D-latch is designed as part of the ADC. The digital logic of the SAR ADC was implemented in Verilog-A. Dynamic power consumption was measured over 100 clock cycles for the comparator and the latch together and was found to be 4.3 µW at a 1 MHz clock.
Mohammed Ismail El-Naggar, PhD (Advisor)
Waleed Khalil, PhD (Committee Member)
97 p.
Electrical Engineering
analog circuits; vlsi; rail-to-rail; rail-rail; chopper amplifier; dickson charge pump; sar adc; data conversion; medical socs; biochips; biosignals; voltage references; MOS

Recommended Citations

Citations

  • Balasubramanian, S. (2009). Low-voltage and low-power libraries for Medical SoCs [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1259776639

    APA Style (7th edition)

  • Balasubramanian, Sidharth. Low-voltage and low-power libraries for Medical SoCs. 2009. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1259776639.

    MLA Style (8th edition)

  • Balasubramanian, Sidharth. "Low-voltage and low-power libraries for Medical SoCs." Master's thesis, Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1259776639

    Chicago Manual of Style (17th edition)

osu1259776639
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© 2009, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.