| 摘要 |
<p>PROBLEM TO BE SOLVED: To make continuable the operation over a wide operation range outside an operation guarantee temperature range without using an electronic component of a wide operation guarantee temperature range, a cooling device or a heating device by changing a power supply voltage to be supplied to an arithmetic processing circuit based on voltage information supplied from a temperature measurement circuit. SOLUTION: The temperature measurement circuit 3b measures the ambient temperature, surface temperature and peripheral substrate temperature, etc., of an arithmetic processing unit 1 by temperature sensors such as a thermistor or the like and sends the voltage information to a power source circuit 5 based on the temperature. The temperature measurement circuit 3b is provided with a temperature/voltage conversion table inside and the voltage information for keeping the electronic moving speed of the arithmetic processing circuit 1 is analog/digital converted in the temperature/voltage conversion table and outputted from the temperature/voltage conversion table. Then, in the power source circuit 5, the power supply voltage is changed based on the voltage information outputted from the temperature measurement circuit 3 and the power supply voltage is supplied to the arithmetic processing circuit 1.</p> |
