| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve a problem in that a temperature is not reduced even when a voltage supplied to an amplifier unit is switched from high voltage to low voltage in an amplification device which switches a voltage supplied to the amplifier unit depending on temperature.SOLUTION: When a temperature T measured by a temperature sensor 8 is no more than 65°C, a microcomputer 2 controls a voltage supply circuit 7 to supply high voltage to a power amplifier circuit 5. Further, when the temperature T measured by a temperature sensor 8 is no less than 70°C, the microcomputer 2 controls the voltage supply circuit 7 to supply low voltage to the power amplifier circuit 5. Furthermore, when the temperature T measured by a temperature sensor 8 is higher than 65°C, the microcomputer 2 controls, after supplying low voltage to the power amplifier circuit 5, a volume adjusted by a volume adjusting circuit 4 to be lowered by 6 dB.</p> |
