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Astable Oscillator Circuits using Silicon-on-Insulator Timer Chip for Wide Range Temperature SensingTwo astable oscillator circuits were constructed using a new silicon-on-insulator (SOI) 555 timer chip for potential use as a temperature sensor in harsh environments encompassing jet engine and space mission applications. The two circuits, which differed slightly in configuration, were evaluated between -190 and 200 C. The output of each circuit was made to produce a stream of rectangular pulses whose frequency was proportional to the sensed temperature. The preliminary results indicated that both circuits performed relatively well over the entire test temperature range. In addition, after the circuits were subjected to limited thermal cycling over the temperature range of -190 to 200 C, the performance of either circuit did not experience any significant change.
Document ID
20090007954
Document Type
Technical Memorandum (TM)
Authors
Patterson, Richard L. (NASA Glenn Research Center Cleveland, OH, United States)
Culley, Dennis (NASA Glenn Research Center Cleveland, OH, United States)
Hammoud, Ahmad (ASRC Aerospace Corp. Cleveland, OH, United States)
Elbuluk, Malik (Akron Univ. Akron, OH, United States)
Date Acquired
August 24, 2013
Publication Date
November 1, 2008
Subject Category
Electronics and Electrical Engineering
Report/Patent Number
E-16581
NASA/TM-2008-215417
Funding Number(s)
CONTRACT_GRANT: NNC06BA07B
Distribution Limits
Public
Copyright
Public Use Permitted.

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NameType 20090007954.pdf STI