Distributed Microsystems Distributed Microsystems Laboratory: Laboratory: Developing Microsystems that Make Sense Developing Microsystems that Make Sense • Goals: To perform true systems integration for existing or incrementally advanced sensor technologies in such a way as to meet system- level constraints related to: • power consumption • robustness in real-world environments • auto-calibration capability • small size, portable deployment • self-diagnostic capability • multi-stimulus detection • sensitivity limits without sacrificing stimulus recognition
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Distributed Microsystems Laboratory: Developing Microsystems that Make Sense
Distributed Microsystems Laboratory: Developing Microsystems that Make Sense. Goals: To perform true systems integration for existing or incrementally advanced sensor technologies in such a way as to meet system-level constraints related to: power consumption - PowerPoint PPT Presentation
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Distributed Microsystems Laboratory:Distributed Microsystems Laboratory:Developing Microsystems that Make SenseDeveloping Microsystems that Make Sense
• Goals: To perform true systems integration for existing or incrementally advanced sensor technologies in such a way as to meet system-level constraints related to:
• power consumption
• robustness in real-world environments
• auto-calibration capability
• small size, portable deployment
• self-diagnostic capability
• multi-stimulus detection
• sensitivity limits
without sacrificing stimulus recognition capability
Distributed Microsystems Laboratory:Distributed Microsystems Laboratory:Developing Microsystems that Make SenseDeveloping Microsystems that Make Sense
Areas of Research in Microsystems Development• Chemical Sensing Microsystems
• Modeling of front-end olfaction in sensor array design and architecture to enhance system robustness, resilience to broken sensors, auto-calibration capability, and sensitivity floor (detection limit).
• Streamlining of signal processing to adapt chemical discrimination algorithms to lower-overhead equivalents for implementation in portable systems
• Sensor platform development for extraction of multiple features from a single micro-sensor in an array (including instrument development)
• Miniaturization of existing larger chemical sensors and systems
• Optimization of signal conditioning and readout circuits to reduce superfluous information and enhance signal-to-noise ratios
Distributed Microsystems Laboratory:Distributed Microsystems Laboratory:Developing Microsystems that Make SenseDeveloping Microsystems that Make Sense
Areas of Research in Microsystems Development• Chemical Sensing Microsystems: Available Sensor Technologies
• ChemFETs: • streamlined signal processing, • sensor platform development, • miniaturization of systems, • optimization of signal conditioning.
• Metal-oxide Sensors: • olfactory modeling, • sensor platform development
• SPR (surface plasmon resonance): • streamlined signal processing; • miniaturization of systems
Distributed Microsystems Laboratory:Distributed Microsystems Laboratory:Developing Microsystems that Make SenseDeveloping Microsystems that Make Sense
Areas of Research in Microsystems Development• Other Microsystems
• Development of application specific integrated CMOS imagers and auditory systems modeled after biology
• Development of imaging and auditory microsystems for streamlined, low-power implementation
• Development of integrated pressure sensors for characterizing and controlling biopsy sample preparation
• Development of integrated platforms for evaluating fluorescence of living, dead, and lysed cells
• Radio Frequency Identification systems for monitoring health of trees to increase their market value (and thereby decrease the number of trees that need to be cut down).
Distributed Microsystems Laboratory:Distributed Microsystems Laboratory:Developing Microsystems that Make SenseDeveloping Microsystems that Make Sense
• What Drives Research in this Laboratory? (e.g. the Vision)• LINK TO INDUSTRY: THE APPLICATIONS
• Environment
• Environmental monitoring and remediation (groundwater and airborne pollutants)
• Protecting health and welfare of human beings
• Chemical and Biological Warfare Sensor Systems useful for widespread distributed implementation
• Improved Sensor Systems for Biomedical Research
• ENGINEERING PERSPECTIVE: SYSTEMS INTEGRATION
• MAUV
• SCIENCE PERSPECTIVE: MODELLING OF BIOLOGY
• Olfactory, Auditory, and Vision Modelling
Distributed Microsystems Laboratory:Distributed Microsystems Laboratory:Developing Microsystems that Make SenseDeveloping Microsystems that Make Sense
• What Drives Research in this Laboratory? (e.g. the Vision)• PERSONAL PERSPECTIVE AND CONVICTIONS
• Teaching• “Classes”: critical thinking are weighted as heavily as topical skills• “Laboratory”: teamwork, maturity and responsibility, long-term
potential and vision of students should be developed with as much seriousness as the topical experience. Don’t clone graduate students!
• Use (constructive) criticism and high expectations as a tool to driving students toward reaching their potential.
• Research: • No weapons of mass destruction ever• Keep “making the world a better place” at the top of the priority list
• Service:• Be kind, give easily, don’t get overextended.
Global Communication(for automatic gain control),Control/Readout Lines
Scale-Invariant A/D Conversion Scale-Invariant A/D Conversion applied to a CMOS Imagerapplied to a CMOS Imager
Ratio-based A/D Conversion: ExampleRatio-based A/D Conversion: Example
75/25 high/low
Original Image
50/50 high/low
25/75 high/low
2-bit converted image
Chemical Sensing Chemical Sensing MicroMicrosystems: systems: Scaling Down Larger SystemsScaling Down Larger Systems
• Scale: centimeter-size Capteur sensors to micron-size sensors
• Additional capability: two electrode widths determine whether analyte penetrates into the bulk or remains on the surface of the sensor; provides additional information with which to discriminate analytes
• Performance Improvements: lower power, faster response time for both sensors and sensor heaters
Chemical Sensing Chemical Sensing MicroMicrosystems: systems: Overcoming CMOS Compatibility IssuesOvercoming CMOS Compatibility Issues
• Problem: surface non-uniformity causes non-uniform chemical sensing film deposition
• Solution: use vertical sidewalls as sensor surface coatings
• Problem: conventional silicon direction-selective etching attacks bonding pads and other exposed aluminum
• Solution: use different sensor platform architectures that enable dry, isotropic etch