fyi:

Directory Sites Press Submit Site Submit Press Release Submit Research



Login: Password: Not Register? Sign Up NOW!

Date: 25 November 2009 All Categories AERONAUTICAL AGRICULTURAL ARCHITECTURAL BIOMEDICAL CHEMICAL CIVIL ELECTRICAL ELECTRONICS ENVIRONMENTAL ERGONOMICS MARINE MECHANICAL MINING NUCLEAR OPTICAL PETROLEUM STRUCTURAL TELECOMMUNICATIONS

Trade.Information
Company
--------------
Product
|Job.Opportunity|Research|Engineering.Dictionary.&.Resources|Forum Enter your search termsSubmit search form
Web 4engr.com


New radio chip mimics human ear, could enable universal radio

Search: Category: All Categories Organic electronics Adaptive Optics Advanced Materials Advanced packaging and interconnection technologies Aeronautical Agricultural Architectural Biodesign Bioelectronics BioFuels Biomedical Chemical Civil Engineering Computer Graphics Computer science & technology Design technologies Earthquake Engineering Electrical Electronics Environmental engineering Environmental Fluid Mechanics Genetic Engineering Geo sciences & technology Integrated Systems Marine Mechanical Minning Multi-mode multimedia (M4) technologies Nanobiotechnology Nanocharacterization Nanofabrication Networking Nuclear Nuclear Magnetic Resonance Optical imaging Optoelectronics Petroleum Photonics Polymer Interfaces and Macromolecular Assemblies Quantum Computing Rapid Prototyping Robotics Solar cells STAR (Space, Telecommunications & Radioscience) STRUCTURAL Synchrotron Radiation Systems Optimization TelecommunicationType: All Types Discover, clarify, and form universal theories Observations, experimentation, and theoretical calculation Technological and socio-economical commercial feasibility
Topic Name: New radio chip mimics human ear, could enable universal radio Category: Electronics

Research persons:

Location: Cambridge, United States
Details


MIT engineers have built a fast, ultra-broadband, low-power radio chip, modeled on the human inner ear, that could enable wireless devices capable of receiving cell phone, Internet, radio and television signals. Rahul Sarpeshkar, associate professor of electrical engineering and computer science, and his graduate student, Soumyajit Mandal, designed the chip to mimic the inner ear, or cochlea. The chip is faster than any human-designed radio-frequency spectrum analyzer and also operates at much lower power. "The cochlea quickly gets the big picture of what's going on in the sound spectrum," said Sarpeshkar. "The more I started to look at the ear, the more I realized it's like a super radio with 3,500 parallel channels." Sarpeshkar and his students describe their new chip, which they have dubbed the "radio frequency (RF) cochlea," in a paper to be published in the June issue of the IEEE Journal of Solid-State Circuits. They have also filed for a patent to incorporate the RF cochlea in a universal or software radio architecture that is designed to efficiently process a broad spectrum of signals including cellular phone, wireless Internet, FM, and other signals. Copying the cochlea: The RF cochlea mimics the structure and function of the biological cochlea, which uses fluid mechanics, piezoelectrics and neural signal processing to convert sound waves into electrical signals that are sent to the brain. As sound waves enter the cochlea, they create mechanical waves in the cochlear membrane and the fluid of the inner ear, activating hair cells (cells that cause electrical signals to be sent to the brain). The cochlea can perceive a 100-fold range of frequencies -- in humans, from 100 to 10,000 Hz. Sarpeshkar used the same design principles in the RF cochlea to create a device that can perceive signals at million-fold higher frequencies, which includes radio signals for most commercial wireless applications. The device demonstrates what can happen when researchers take inspiration from fields outside their own, says Sarpeshkar. "Somebody who works in radio would never think of this, and somebody who works in hearing would never think of it, but when you put the two together, each one provides insight into the other," he says. For example, in addition to its use for radio applications, the work provides an analysis of why cochlear spectrum analysis is faster than any known spectrum-analysis algorithm. Thus, it sheds light on the mechanism of hearing as well. The RF cochlea, embedded on a silicon chip measuring 1.5 mm by 3 mm, works as an analog spectrum analyzer, detecting the composition of any electromagnetic waves within its perception range. Electromagnetic waves travel through electronic inductors and capacitors (analogous to the biological cochlea's fluid and membrane). Electronic transistors play the role of the cochlea's hair cells. The analog RF cochlea chip is faster than any other RF spectrum analyzer and consumes about 100 times less power than what would be required for direct digitization of the entire bandwidth. That makes it desirable as a component of a universal or "cognitive" radio, which could receive a broad range of frequencies and select which ones to attend to. Biological inspiration This is not the first time Sarpeshkar has drawn on biology for inspiration in designing electronic devices. Trained as an engineer but also a student of biology, he has found many similar patterns in the natural and man-made worlds (http://www.rle.mit.edu/avbs). For example, Sarpeshkar's group, in MIT's Research Laboratory of Electronics, has also developed an analog speech-synthesis chip inspired by the human vocal tract and a novel analysis-by-synthesis technique based on the vocal tract. The chip's potential for robust speech recognition in noise and its potential for voice identification have several applications in portable devices and security applications. The researchers have built circuits that can analyze heart rhythms for wireless heart monitoring, and are also working on projects inspired by signal processing in cells. In the past, his group has worked on hybrid analog-digital signal processors inspired by neurons in the brain. Sarpeshkar says that engineers can learn a great deal from studying biological systems that have evolved over hundreds of millions of years to perform sensory and motor tasks very efficiently in noisy environments while using very little power. "Humans have a long way to go before their architectures will successfully compete with those in nature, especially in situations where ultra-energy-efficient or ultra-low-power operation are paramount," he said. Nevertheless, "We can mine the intellectual resources of nature to create devices useful to humans, just as we have mined her physical resources in the past. About the Researcher : Rahul Sarpeshkar obtained Bachelor’s degrees in Electrical Engineering and Physics at MIT. After completing his PhD at Caltech, he joined Bell Labs as a member of technical staff in the department of Biological Computation within its Physics division. Since 1999, he has been on the faculty of MIT's Electrical Engineering and Computer Science Department where he heads a research group on Analog VLSI and Biological Systems. He has received several awards including the Packard Fellow award given to outstanding young faculty, the ONR Young Investigator Award, the NSF Career Award, and the Indus Technovator Award. He holds over twenty patents and has authored more than 70 publications including one that was featured on the cover of NATURE. He has given over 100 invited lectures. He is currently an Associate Editor of the IEEE Transcations on Biomedical Circuits and Systems. He has received the Junior Bose award and the Ruth and Joel Spira award for excellence in teaching at MIT. His research interests include analog and mixed-signal VLSI, biomedical systems, ultra low power circuits and systems, biologically inspired circuits and systems, molecular biology, neuroscience, and control theory. Massachussetts Institute of Technology 77 Massachusetts Avenue Room 38-294 Cambridge, MA 02139-4307 phone : 617.253.4872 e-mail: rahuls@mit.edu



Tags: MIT - radio chip - human inner ear - Rahul Sarpeshkar - cochlea - VLSI - -
Research Documents:
Related research: nanowire-based nanotechnology: sublithographic programmable logic arrays, A Colossus Gets its Name, A research project on the next generation of smartphones, An intelligent cars, Carnegie Mellon System Enables Any Digital Camera, Faster Graphene Transistors: Graphene circuits could lead to high-speed wireless devices and advanced weapons detectors., Flexible electronics with high-performance organic transistors., Flow specially of tiny bubbles specially microfluidic device mimics computer circuitry, Intruder alert: 'Smart Dew' will find you!, Lithography Past Light's Limits: A new optical etching technique could lead to faster microchips., Micro- and Nano- Systems Cluster, New ways to combat the persistent problem of thermal management, NIST Scientists measure nanoscale details of photolithography process, Protect the detector electronics of the proposed ILC, Research integrates photonic circuitry on a silicon chip, Researchers at Chalmers have succeeded in combining integrated receiver for high frequency applications, Researchers have designed a new device will make quality control of radiotherapy treatments possible, Researchers race ahead with latest Spintronics achievement, Sensors developed by MicroStrain : Life Can Be a Strain, The world first digital UWB transmitter IC, World's first ideal anti-reflection coating

Add Research

Full Name *
Email address *
Location
Your Research *







Latest Searched Researchmechanical - graphene - engineering - artificial intelligence - gold - ipod - transistors - quality protection of ground water - 5 - e - nuclear proliferation - network - spaghetti tangle - rescue - result

Home | Members.Benefit | Privacy.Policy | Bookmark.This.Page | Contact.Us
© 2006 - 2007 4engr. All Rights reserved
|Conveyor technology|