| 摘要 |
A temperature detecting circuit comprising a three-wire temperature sensor module including a temperature responsive resistance, three cable leads and first, second and third terminals connected to the three leads, a reference voltage source having first and second power terminals, said first terminal being connected to the first power terminal, a first resistance connected across said third terminal and second power terminal, a second and a third resistance connected in series across said second terminal and said second power terminal, a potential divider being connected across the first and second power terminals and having a movable contact, and an adder which sums a first voltage appearing at a junction between the third terminal and said first resistance, a second voltage appearing at a junction between said second and third resistances and a third voltage appearing on said movable contact and generates an output signal when said temperature responsive resistance senses a detection temperature and said movable contact is positioned to a point corresponding to the detection temperature.
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