Fish & Chips 

University of Rhode Island

Department of Electrical and Computer Engineering



  Project Description:

        This project involves the design of an archival temperature monitoring tag to be used to collect habitat information of Atlantic salmon during the marine phase of the species' natural history.  The monolithic circuit should not exceede an average power dissipation of 3.4uW, so that a small 3V, 30 mAh lithium battery will provide the device with the expected lifetime of 3 years.  The thermal sensor is realized by a p-n junction.  The recorded junction voltages are digitized and stored in static RAM cells.  The tag is programmed before deployment by an external computer via a serial interface.  The device's temperature-monitoring protocol is defined at this stage.  Upon retrieval of the tag, the stored temperature values will be transferred to a computer where the geographical location of the fish at the actual sampling time will be deduced through retrospective navigation based on known sea temperature distribution.


 Fishtag Lifecycle:

            This is a graphical representation of how we forsee the fishtag being used.

 Fishtag lifecycle



 Circuitry Layout and Photographs:

(Click on Image for Larger View) 

Magic layout

Entire chip
Fishtag layout

Micro-photograph

Entire Chip
Fishtag photo

Detailed analog sensing portion
Fishtag layout
Detailed analog sensing portion
Fishtag analog photo




 Development Team:

Godi Fischer
 Professor, Department of Electrical & Computer Engineering
Conrad Recksiek
 Professor, Department of Fish, Animal & Vet. Science
H. Thomas Rossby
 Professor, Graduate School of Oceanography
Sangmok Lee
 Ph.D. Candidate, Department of Electrical & Computer Engineering
Michael Obara
 Ph.D. Candidate, Department of Electrical & Computer Engineering

 


 Publications:

Godi Fischer, Sangmok Lee and Michael Obara: "A Programmable Monolithic Temperature Logging Device."  Proc. of MWSCAS '02, Tulsa OK, Aug 4-8 2002

G. Fischer and S. Lee.  "Monolithic temperature sensors."  Sensor and Surface Technology (SST) Seminar, University of Rhode Island, Mar. 1999

G. Fischer, J.C. Daly, C.W. Recksiek, K.D. Friedland, B. Watkins, S. Lee, and D. Hyun: "A Programmable Data Logging Device for Fish Habitat Observation."  Proc. of CMOC '98, Hartford, CT, March 24, 1998.

G. Fischer, J.C. Daly, C.W. Recksiek, and K.D. Friedland: "A Programmable Temperature Monitoring Device for Tagging Small Fish - A Prototype Chip Development."  IEEE Trans. on VLSI Systems, Vol. 05/04, pp.401-407, Dec. 1997.

G. Fischer and B. Watkins. "A programmable temperature monitoring device for tagging small fish."  Sensor and Surface Technology (SST) Seminar, University of Rhode Island, Mar. 1997

J.C. Daly, G. Fischer, K.D. Friedland, C.W. Recksiek, and C. Yang.  "Design of a programmable temperature monitoring device for tagging small fish"  Proc. of IEEE Intl. Symposium on Low Power Electronic Design, Monterey, CA.  1996


Updated 7/21/03 by MJO