| 摘要 |
An infrared sensor (10) includes a thermopile (16) connected in series with an ambient temperature compensation resistance temperature detector (RTD) (18) and four electrical leads (20, 22, 24, 26). The thermopile (16) produces a voltage as a function of temperature of a point of interest, while the RTD (18) varies in resistance as a function of ambient temperature. Two of the leads (22, 24) deliver current to energize the RTD (18). The other two leads (20, 24) of (26) are used for sensing voltages produced by the thermopile (16) and the RTD (18). |
