| 摘要 |
PURPOSE:To accurately calculate collector loss, by such simple constitution that the collector loss corresponding to output voltage or the like preliminarily stored in a memory means is read out through detecting output voltage or the like. CONSTITUTION:When the output voltage of an electric power amplifier 1 is applied through an A/D converter 3, collector loss is read out from a memory part where the collector loss corresponding to the output voltage of a microcomputer 4 is preliminarily stored to be outputted from a D/A converter 5. Therefore, the collector loss of the output transistor of the electric power amplifier 1 is calculated accurately by simple constitution. In addition, even if the collector loss corresponding to an output current is stored to be read out by the detecting output current, a similar result is obtained. |
