| 摘要 |
<p>A pressure-sensitive transducer provided with a circuit for reducing the output offset and offset drift of a pressure-sensitive resistor and a circuit for reducing the variation of the resistance value of the pressure-sensitive resistor and the variation of the output caused by the variation of change characteristics of the resistance value. The transducer comprises a pressure-sensitive resistor (1), a control means (2) which is an electric circuit means adapted to measure an electrical characteristic of the pressure-sensitive resistor, connected to the pressure-sensitive resistor, including A/D converters (3,4), a D-A converter (6) and a memory (5), and adapted to correct the electrical characteristic changed by the variation in resistance value of the pressure-sensitive resistor and output the correction value from the D/A converter (6), a temperature sensor connected to an A/D input terminal of the control means, and an adjustment value input terminal (7) for inputting the error between the electrical characteristic of the pressure-sensitive resistor and the reference characteristic to an A/D input terminal of the control means. Thus the device is provided with a circuit for reducing the output offset and the offset drift of the pressure-sensitive resistor.</p> |
