| 摘要 |
A sensor has a voltage output circuit and a potentiometric resistor for dividing the voltage of the voltage output circuit. The resistance of the potentiometric resistor is regulated by trimming in order to regulate the output voltage of the sensor. A sensor has a voltage output circuit and a serial resistor connected in series with the voltage output circuit. The total resistance of the voltage output circuit and the serial resistor is regulated by trimming so as to have a certain relation with the output voltage of the voltage output circuit. The resistance of the potentiometric resistor or the serial resistor may be 100 times or more as much as the resistance of the voltage output circuit. The voltage output circuit may comprise a resistor having a positive resistance temperature coefficient, a semiconductor whose resistance changes in accordance with a gas concentration, or a piezoelectric element for converting a stress into a piezoelectric signal. According to the sensor, the unevenness of the output voltage can be reduced.
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