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31	Toward Cuffless Blood Pressure Monitoring: Integrated Microsystems for Implantable Recording of Photoplethysmogram Marefat, Fatemeh 07 September 2020 (has links) No description available. Electrical Engineering Biomedical Engineering Biomedical Research Health Care Biomedical Implants Implantable Microsystems Implantable Photoplethysmography CMOS Integrated Circuits PPG readout IC Cuffless blood pressure monitoring Light-to-digital converter Current sensing
32	An Exploratory Study of Pulse Width and Delta Sigma Modulators Penrod, Logan B 01 December 2020 (has links) (PDF) This paper explores the noise shaping and noise producing qualities of Delta-Sigma Modulators (DSM) and Pulse-Width Modulators (PWM). DSM has long been dominant in the Delta Sigma Analog-to-Digital Converter (DSADC) as a noise-shaped quantizer and time discretizer, while PWM, with a similar self oscillating structure, has seen use in Class D Power Amplifiers, performing a similar function. It has been shown that the PWM in Class D Amplifiers outperforms the DSM [1], but could this advantage be used in DSADC use-cases? LTSpice simulation and printed circuit board implementation and test are used to present data on four variations of these modulators: The DSM, PWM, the out-of-loop discretized PWM (OOLDP), and the cascaded modulator. A generic form of an Nth order loop filter is presented, where three orders of this generic topology are analyzed in simulation for each modulator, and two orders are used in physical testing. Delta Sigma Modulator Pulse Width Modulator Quantization Noise Time Discretization Delta Sigma Analog to Digital Conversion Class D Amplifier Controls and Control Theory Signal Processing Systems and Communications
33	NOVÉ PRINCIPY CHARAKTERIZACE HRADLOVÝCH KAPACIT PRO SIGMA-DELTA MODULÁTORY / NEW PRINCIPLES OF GATE CAPACITANCE CHARACTERIZATION FOR SIGMA-DELTA MODULATORS Sutorý, Tomáš January 2009 (has links) This thesis deals with the utilization of new principles of characterization of gate capacitances for sigma-delta modulators. Sigma-delta modulators are the integral part of sigma-delta analog-to-digital converters. The proposed new method is characterized by high resolution and modest requirements for laboratory equipment. It allows characterizing capacitances whose values are within the range which is used in sigma-delta modulators. The thesis contains description of the new method, the analysis of measurement accuracy and experimental results.

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