Emerging technologies of computation
This presentation is the property of its rightful owner.
Sponsored Links
1 / 10

Emerging Technologies of Computation PowerPoint PPT Presentation


  • 59 Views
  • Uploaded on
  • Presentation posted in: General

Emerging Technologies of Computation. Montek Singh COMP790-084 Sep 20, 2011. Today: Energy Harvesting Systems. Basics of energy harvesting why must some systems harvest energy? where do you scavenge energy from? Introductory case studies Philips CEA-LETI Next class: More case studies

Download Presentation

Emerging Technologies of Computation

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Emerging technologies of computation

Emerging Technologies of Computation

Montek Singh

COMP790-084

Sep 20, 2011


Today energy harvesting systems

Today: Energy Harvesting Systems

  • Basics of energy harvesting

    • why must some systems harvest energy?

    • where do you scavenge energy from?

  • Introductory case studies

    • Philips

    • CEA-LETI

  • Next class:

    • More case studies

    • Challenges and Benefits

    • Open questions


Basics of energy harvesting

Basics of energy harvesting

  • What is energy harvesting?

    • no power supply, no batteries

    • somehow scavenge energy from physical env

  • What type of systems must harvest energy?

    • hard to replace/recharge batteries

    • hard to have batteries at all

    • examples?


Basics of energy harvesting1

Basics of energy harvesting

  • Where do you harvest energy from?

    • ambient light/solar: using photovoltaic cells

      • range: 0.1W/sq cm direct sun; 0.1mW/sq cm indoors

      • silicon solar cells only 5-20% efficiency; 0.6V/cell

    • temperature gradients: using thermoelectric generators

      • Seebeck effect turns temp gradients into electricity

      • few hundred mV with a few Kelvin gradient


Basics of energy harvesting2

Basics of energy harvesting

  • Where do you harvest energy from? (contd.)

    • Vibration energy: using electrostatic transducers

      • below 100Hz

    • RF power: using tuned antenna

      • if 2W emitted by reader: 0.5-2mW harvested at 1-2 meters distance

      • used in RFID tagging

    • Inertial kinetic energy: from human body

      • using knee brace, backpack, etc.

      • Seiko automatic watches!


Basics of energy harvesting3

Basics of energy harvesting

  • Where do you harvest energy from? (contd.)

    • Biosensing: use blood glucose!

    • Acoustic vibrations: using piezoelectric transducers

    • Wind energy…

    • Tidal/water waves…


Case study philips smartcard

Case Study: Philips smartcard

  • Contactless smart card

    • basic architecture


Case study philips smartcard1

Case Study: Philips smartcard

  • Why asynchronous?

    • async overall consumes less energy

    • async has better current/power profile: more spread

    • async has no fixed clock rate


Case study philips smartcard2

Case Study: Philips smartcard

  • Graceful performance adaption with voltage


Case study philips smartcard3

Case Study: Philips smartcard

  • Smart card chip layout

    • RAM

    • ROM

    • EEPROM

    • async microcontroller


  • Login