Temperature Limits, Ratings, and Natural Cooling Procedures for Avionic Equipment and Parts
01 Mar 1958-Ire Transactions on Aeronautical and Navigational Electronics (IEEE)-Vol. 1, Iss: 1, pp 15-24
TL;DR: In this paper, the authors outline the flow of heat within, through, and from heat producing electronic parts in terms of internal thermal limitations, part surface and environmental ratings, and cooling indices.
Abstract: The results of adequate cooling of electronic parts are gains in part life and reliability. An engineering compromise between ideal electronic part temperature and the thermal point of diminishing return must be evaluated not only with respect to desired life, but also in terms of the electronic circuit and cooling efficiencies. This paper outlines the flow of heat within, through, and from heat producing electronic parts in terms of internal thermal limitations, part surface and environmental ratings, and cooling indices. Natural heat flow design data pertinent to conduction cooling of heat sources, tube shields, the placement and mounting of parts, and ?sink connectors? are presented.
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TL;DR: In this article, two sine waves of angular frequency ω1 and ω2 are mixed to the beat signal, and the phase of beat signal is modulated to a degree of 2π in a period of ωl(ω1-ω2).
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