日本丰田工业大学试制了可在外围温度＋454℃下工作的双极集成电路。具体电路实例：试制了9段环形振荡器，并确认了其工作情况。门延迟为22ns，输出振幅约30mw、工作条件：电源电压＋0．612V、电源电流903mA。通常的双极集成电路的外固温度限制为120℃左右。其主要原因是：当外 Japan’s Toyota Industries trial prototype can work at a peripheral temperature +454 ℃ bipolar integrated circuits. Specific circuit example: trial production of nine ring oscillator, and confirmed its work. Gate delay of 22ns, the output amplitude of about 30mw, working conditions: supply voltage + 0.612V, supply current 903mA. Common bipolar integrated circuit outside the solid temperature limit is about 120 ℃. The main reason is: when outside