WIND VELOCITY SENSOR, MASS AIRFLOW SENSOR, AND FUEL BATTERY SYSTEM

摘要

PPROBLEM TO BE SOLVED: To provide a wind velocity sensor capable of improving responsiveness using a simple circuit while reducing costs; to provide a mass airflow sensor using such a wind velocity sensor; and to provide a fuel battery system using such a mass airflow sensor. PSOLUTION: The fuel battery system comprises: diodes D1, D2 arranged in a gas for detecting wind velocity; resistors R1, R2 for supplying a forward current to the diodes D1, D2; a zener diode ZD1 for heating the diode D2; and a differential amplification circuit 531 for outputting a differential signal S1 for indicating the difference between a forward voltage Vd1 generated in the diode D1 and a forward voltage Vd2 generated in the diode D2 as a signal for indicating wind velocity. PCOPYRIGHT: (C)2008,JPO&INPIT