Bernhard Boser (Advisor)

Interface Electronics for Ultrasonic Transducers

Hao-Yen Tang
Bernhard E. Boser
David A. Horsley
Liwei Lin
2016

Ultrasound has long been used for medical imaging. Recent advances of miniaturized MEMS ultrasonic transducers new applications such as gesture recognition, personal fitness devices, and fingerprint sensors. These devices are considerably smaller than conventional transducers. To benefit from their lower excitation power requirements and address the reduced sensitivity requires the design of novel interface electronic circuits.

The first part of this thesis describes new circuits capable of generating all the high voltage drive signals for MEMS transducers on-chip from a single low...

CMOS Magnetic Particle Flow Cytometer

Pramod Murali
Bernhard E. Boser
Ali M. Niknejad
Luke P. Lee
2015

Neutrophils, a class of white blood cells, are our body’s first line of defense against invading pathogens. When the number of neutrophils in blood drops to 200cells/$\mu$L, it leads to a critical clinical condition called neutropenia. Currently, optical flow cytometry is the most common and powerful technique used to diagnose neutropenia, but the centralized nature of the test, time-consuming sample preparation and high cost prevent real-time modification of treatment regimens.

In this thesis, we propose an approach of using magnetic labels to tag and detect cells that allows us...

Pramod Murali

Alumni
Electrical Engineering and Computer Sciences
Professor Bernhard E. Boser (Advisor)
Ph.D. 2015

Hao-Yen Tang

Alumni
Electrical Engineering and Computer Sciences
Professor Bernhard E. Boser (Advisor)
Ph.D. 2016

Turgut Aytur

Alumni
Electrical Engineering and Computer Sciences
Professor Bernhard E. Boser (Advisor)
Ph.D. 2007

Behnam Behroozpour

Alumni
Electrical Engineering and Computer Sciences
Professor Bernhard E. Boser (Advisor)
Ph.D. 2016

Efthymios Papageorgiou

Alumni
Electrical Engineering and Computer Sciences
Professor Bernhard E. Boser (Advisor)
Ph.D. 2019

Chip-scale Lidar

Behnam Behroozpour
Bernhard E. Boser
Ming C. Wu
Liwei Lin
2016

The superiority of lidar compared to radio-frequency and ultrasonic solutions in terms of depth and lateral resolution has been known for decades. In recent years, both application pull such as 3D vision for robotics, rapid prototyping, self-driving cars, and medical diagnostics, as well as technology developments such as integrated optics and tunable lasers have resulted in new activities. Pulsed, amplitude-modulated continuous-wave (AMCW), and frequency-modulated continuous-wave (FMCW) lidars can all be used for ranging. The latter option enables excellent depth resolution at the...

A CMOS Biosensor for Infectious Disease Detection

Turgut Aytur
Bernhard E. Boser
Kristofer S.J. Pister
2007

This dissertation describes the design and implementation of an immunoassay platform based on micron-scale magnetic beads. We target the diagnosis of infectious diseases in developing countries, where small, inexpensive, and automated tests are required. Conventional sensor technologies, such as Giant Magneto-Resistors (GMRs), have excellent sensitivity but are expensive and difficult to integrate with other circuitry. The system presented here is built around a CMOS sensor chip and uses standard manufacturing techniques present in the electronics industry. CMOS technology can...

BEB6: Electrostatic Actuator Design for a Digital Output Gyroscope

Joseph Seeger
2003

This research investigates the dynamics, design, and control of gap-closing, electrostatic actuators. Because of nonlinearity, gap-closing actuators can give rise to complicated behavior, such as instability, frequency tuning, and parametric resonance. We have demonstrated charge control circuits that stabilize gap-closing actuators and increase the range of motion from 33% of the gap to more than 90% of the gap. We have designed a gyroscope proof-mass with parallel-plate actuators for low voltage oscillation in air with frequency tuning. We have identified parasitic effects, such as...