This paper presents a thermal model of electronic circuit based on an analy
tical solution of the heat equation. In particular, the question of modelli
ng circuit radiation cooling is discussed. The proposed model with temperat
ure dependent heat exchange coefficient is applied for the analysis of an i
ntegrated circuit. Simulation results are validated with both infrared and
p-n junction measurements. (C) 2000 Elsevier Science Ltd. All rights reserv
ed.