| 摘要 |
A semiconductor sensor apparatus includes a resistor connected between an output terminal and a power source terminal or a ground terminal of the semiconductor sensor apparatus while an output voltage corresponding to a physical parameter measured by the apparatus is generated. An output voltage limiting circuit in the semiconductor apparatus, during normal operation, limits the output voltage to values between an upper limit and a lower limit. When at least one of the power source terminal, the output terminal, and a ground terminal is open, the limiting circuit causes the output voltage to fall outside of the predetermined range. Thus, the disconnection of any of the power source terminal, the output terminal, and the ground terminal can be detected from the output voltage.
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