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Power control electronics for cryogenic instrumentationIn order to achieve a high-efficiency high-density cryogenic instrumentation system, the power processing electronics should be placed in the cold environment along with the sensors and signal-processing electronics. The typical instrumentation system requires low voltage dc usually obtained from processing line frequency ac power. Switch-mode power conversion topologies such as forward, flyback, push-pull, and half-bridge are used for high-efficiency power processing using pulse-width modulation (PWM) or resonant control. This paper presents several PWM and multiresonant power control circuits, implemented using commercially available CMOS and BiCMOS integrated circuits, and their performance at liquid-nitrogen temperature (77 K) as compared to their room temperature (300 K) performance. The operation of integrated circuits at cryogenic temperatures results in an improved performance in terms of increased speed, reduced latch-up susceptibility, reduced leakage current, and reduced thermal noise. However, the switching noise increased at 77 K compared to 300 K. The power control circuits tested in the laboratory did successfully restart at 77 K.
Document ID
19960001485
Document Type
Conference Paper
Authors
Ray, Biswajit (NASA Lewis Research Center Cleveland, OH, United States)
Gerber, Scott S. (NYMA, Inc. Brook Park, OH., United States)
Patterson, Richard L. (NASA Lewis Research Center Cleveland, OH, United States)
Myers, Ira T. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1995
Subject Category
ELECTRONICS AND ELECTRICAL ENGINEERING
Report/Patent Number
NAS 1.15:107019
NASA-TM-107019
E-9344-1
Meeting Information
1995 Canadian International Conference and Exhibition(Toronto, CA)
Funding Number(s)
PROJECT: RTOP 233-01-01-03
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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