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In the paper a simple compact model of a transfer of a mechanical energy into an electrical energy is presented. The mechanical energy is stored in a vibrating bimetallic membrane with an electret layer. The membrane vibrations are forced by a set-up consisting of a cold and hot surfaces. During the vibrations this set-up acts as a variable capacitor with one of the electrodes being constantly charged...
The paper refers to modelling characteristics of power LEDs with thermal occurrences taken into account. The electrothermal model of the considered class of devices dedicated for SPICE is proposed. This model takes into account self-heating phenomena and the influence of temperature on their electrical and optical characteristics. The form of the worked out model is described and the results of verification...
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