| 摘要 |
A temperature measuring and identification (TMID) device obtains identifi cation information and temperature information of a connected device having a temperature sensing circuit (TSC). The TSC includes a temperature sensing element (TSE) connected in parallel with a voltage clamping network (VCN) th at limits the voltage across the TSE to an identification voltage within an identification voltage range when the voltage is greater than or equal to a lower voltage of the identification voltage range. When a voltage below the lower range is applied to the TSC, the VCN appears as an open circuit and th e resistance of the TSC corresponds to temperature. A translation circuit wi thin the TMID shifts TSC voltages within the identification voltage range to a normalization voltage range. Accordingly, voltages corresponding to tempe rature as well as voltages corresponding to identification are within the no rmalization voltage range. As a result, the resolution of a voltage sensing device used for measuring the temperature and identification voltages is max imized. In addition, the translation circuit maintains a minimal current dur ing a rest state. For cost or other concerns, a first TSC may omit the VCN t o provide a maximum identification voltage and other TSCs may include VCNs w ith lower identification voltage ranges.
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